S6
y 3 3

•41

1981 IOWA TURFGRASS FIELD DAY
AND EQUIPMENT SHOW

THURSDAY
JUNE 18, 1981

IOWA STATE UNIVERSITY
HORTICULTURAL RESEARCH
STATION
AMES, IOWA

PROGRAM

Thursday
June 18, 1981
9:00 A.M. to 3:30 P.M.

9:00-9:45

Registration (coffee)

9:45-10:00

Introductions & Opening Remarks

10:00-12:00

Observation of Research Area

12:00 - 1:30

Lunch served at Research Station

1:30-3:30

Educational sessions on the control
of diseases, insects and weeds.
Equipment demonstrations.

In case of rain, a morning indoor program is planned at the Research
Station.

MORNING PROGRAM

There are 10 studies on the research area that we will be looking at
between 10:00 and 12:00 this morning. There is a number on the back of
your lunch ticket which corresponds to one of these areas. At 10:00 go to
the study with the same number as that on your ticket (see map of the
research area). Each presentation will last 10 minutes. At the end of
the 10 minute period a horn will blow and your group will have two minutes
to move to the next area. Each group will see all 10 of the research areas.
There are more than 10 studies on the research plots. Please feel free
to visit any of these areas during lunch time or after 3:30. The areas
that will be discussed this morning and the individuals who will present the information on each area are as follows.

1.

Preemergent and Postemergent Herbicide Studies

Nick Christians

2.

Fungicide Trials

Laura Sweets

3.

Bentgrass Cultivar and Management Study

Mike Grooms

4.

Kentucky bluegrass, Perennial Ryegrass & Fine
Fescue Management Study

Robert Shearman

5.

Fertilizer Studies

Jeff Nus

6.

Growth Retardant Study

Sally Johnson

7.

Iron Chlorosis Study on Trees

Wayne Hefley

8.

Sod Production Study

Tom Robeson

9.

Buffalograss Management Study

David Brahm

Turfgrass Cultivar Evaluations

Ed Cott

10.

This is the first year that a research report has been prepared in conjunction with the annual Field Day.

The first projects at the field research

station were begun in the fall of 1979 and the information included in this
report is based on data taken during the 1980 season.

Many of the studies at

the station will require from three to five years before any reliable conclusions can be drawn.

However, I feel that you will find many of the results

in this report to be of interest and hopefully the information included will
be helpful to you.

Research reports of this type will be prepared as a

standard part of the Iowa Turfgrass Field Day in future years.

Nick Christians
June 1981

Sorghum
Sudan

Premium

Baron

Parade

Sod Blend

Baron

Sod Production Study

8
£

Tall Fescue

Buffalograss Management Study

Paint/Growth Retardant Study

Turfgrass
Research
Plots
Summer 1981

Baron
N & K Study —
Phosphorus^)
Fertilization
Demonstration

Fine
Fescue
Management
Study

Non-Irrigated j

Irrigated

1

Kentucky Bluegrass
Management Study

#

Non-lrrigate

Irrigated

Perennial Ryegrass
Management Study
Bentgrass
Cultivar
Study^

Creeping
Bentgrass

?

Texoka

Common

Kentucky
Bluegrass
Cultivar
)ns
Evaluation

10

Perennial
Ryegrass
Cultivar
Evaluations

Tall FescueFine Fescue
Kentucky
Cultivar
Bluegrass
Trials
Seed Mixtures
Baron

Park

I
| Liquid
Fertilization
j Study

Folian
Study

Tall Fescue
Regional Trials
Enmundi

Penneagle

Penncross

Emerald

Emerald

Penneagle

Penncross
Fall
Topdressing
Study

Sharps

Nitrogen
Source
Study

Fall
Fertilization
Study

1!

Park

Preemergent
H erbjc ideJStucty
[~Postemergent
Herbicide Study

N
Building

TABLE OF CONTENTS

Study

Page

Kentucky bluegrass Cultivar Evaluations

1

Perennial Ryegrass Evaluations

4

Tall Fescue Cultivar Trials

7

Fine Fescue Trials

9

Growth Regulator Study

12

Kentucky bluegrass Management Study

20

Perennial Ryegrass Management Study

25

Fine Fescue Management Study

30

Late Fall Topdressing Study

32

KENTUCKY BLUEGRASS CULTIVAR EVALUATIONS

Tables 1 and 2 contain information on the quality and color ratings for
49 Kentucky bluegrass cultivars.

These cultivars were seeded on September 29
2

of 1979.

They received a total of four pounds Nitrogen/1000 ft

season and were watered as needed to prevent drought stress.

in the 1980

The values listed

under each month are the means of ratings made on three replicated plots.
Yearly means of all the months in which data were taken are listed in the last
column.

These yearly means are ranked in descending order.

It should be remembered that the information included in Tables 1 and 2
is from the first year of the study.

The quality ratings were considerably

affected by rate of establishment and it is likely that the order of the
ranking will change in future years.

T a b l e I. K e n t u c k y
growing season.
C U L T 1VAR
1 .
2.
3.
4.
5.
6.
7.
8.
9.
10.
11 .
12.
13.
14.
15.
16.
17.
18.
19.
20.
21 .
22.
23.
24.
25.
26.
27.
28.
29.
30.
31 .
32.
33.
34.
35.
36.
37.
38.
39.
40.
41 .
42.
43.
44.
45.
46.
47.
48.
49.

A-20
TOUCHDOWN
KIMONO
AMERICA
SYDSPORT
ASPEN
PARADE
PARK
CHE R 1
PLUSH
AR 1 STA
VICTA
TRENTON
BRISTOL
ENMUND1
WTN-l-13
A-20-6
WABASH
ESCORT
A-34
MERION
K3-160
SV 1 NG
RAM 1
BARBIE
FYLKING
BIRKA
PENNSTAR
MAJESTIC
GLADE
RUGBY
P-164
ADELPH1
MERIT
AQUILLA
K76-86-11
S E N IC
WTN H-7
NUGGET
1528T
BARON
FANFARE
VANTAGE
BONNIEBLUE
SV 0 1 6 1 7
N535
COMMON
COLUMBIA
BFB-35

bluegrass

MAY
7.0
6.5
7.0
5.5
6.5
6.5
7.0
8.0
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
7.0
6.5
6.5
7.5
6.5
6.5
6.0
5.5
6.5
6.0
6.5
6.5
7.0
5.5
6.5
6.5
6.5
6.0
7.0
7.0
7.0
6.5
6.5
5.0
5.0
6.5
6.0
5.5
6.0
4.5
5.5
2.5
2.5

JUNE
7.5
7.5
7.0
7.5
7.5
7.0
7.5
7.5
7.5
7.0
7.0
7.5
7.5
6.5
6.5
7.5
7.5
7.0
7.5
7.5
7.0
7.0
7.5
6.5
6.5
7.0
7.5
6.5
6.0
6.5
6.5
7.0
7.0
6.5
7.0
6.5
6.5
6.5
6.0
5.5
5.5
6.5
5.5
5.5
6.5
5.0
5.0
2.5
3.5

quality

ratings

JULY

AUG

OCT

NOV

MEAN

8.0
7.5
8.0
8.5
7.5
7.5
7.5
7.0
8.0
7.5
7.5
7.5
8.0
7.5
8.0
7.5
7.5
7.5
7.5
7.5
7.5
7.0
7.5
7.5
7.0
7.0
6.5
7.5
7.0
7.5
7.0
7.5
7.0
7.5
7.5
6.5
6.5
6.5
7.0
7.0
7.0
6.5
6.5
7.0
6.5
6.0
5.0
4.0
5.0

8.5
8.0
8.5
8.5
8.0
7.5
8.0
7.5
8.0
8.0
8.0
8.0
8.0
8.0
8.0
8.0
7.5
8.0
8.0
7.5
7.0
6.5
7.5
8.0
7.0
7.5
7.0
7.0
7.0
8.0
7.5
7.5
7.5
7.5
7.0
7.0
7.0
7.0
7.0
7.5
7.5
7.0
7.0
7.0
6.5
7.0
5.5
6.5
5.0

8.5
8.5
8.0
9.0
8.0
8.0
8.5
6.5
8.0
8.0
8.0
7.5
8.0
8.0
7.5
8.5
7.5
8.0
8.0
8.0
7.5
7.0
7.0
8.0
7.0
7.5
7.0
7.5
7.0
8.0
8.0
7.5
7.5
7.5
7.5
7.0
6.5
7.0
7.0
7.5
7.5
6.5
6.5
7.5
7.0
7.5
5.0
7.0
5.5

8.0
8.0
8.0
8.0
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.0
5.0
4.5
4.5

8.0
8.0
8.0
7.5
7.5
7.5
7.5
7.5
8.0
7.5
7.5
8.0
7.5
7.5
7.5
7.5
7.5
7.5
8.0
7.5
7.5
7.0
8.0
7.0
7.5
7.5
7.5
7.0
7.0
8.0
7.0
7.5
7.5
7.0
7.5
6.5
6.5
6.5
6.5
6.5
7.0
7.0
7.0
6.5
7.0
5.5
5.5
3.0
4.0

Q u a l i t y is r a t e d a t 9 = b e s t q u a l i t y
6 or h i g h e r c o n s t i t u t e s a c c e p t a b l e

for

and 1 = d e a d
quality.

the

1980

turf. A rating

of

Table 2.
Kentucky
g r o w i ng s e a s o n ,

C U L T 1VAR

MAY

1 . RAM 1
2. CHER 1
3 . N-535
4. 1 528T
5. VICTA
6. BRISTOL
7. ENMUND1
8. MERIT
9. ESCORT
10. SYDSPORT
1 1 . P-164
12. ASPEN
13. TOUCHDOWN
14. PARADE
1 5 . K1 M O N O
1 6 . B A R B 1E
17. NUGGET
18. C0LUMB1 A
19. AMERICA
2 0 . BARON
21 . AR 1 S T A
22. FYLK1NG
2 3 . BIRKA
24. PENNSTAR
25. TRENTON
2 6 . GLADE
2 7 . RUGBY
28. ADELPHI
29. AQUILLA
30. SV-01617
3 1 . S E N IC
3 2 . MERI ON
3 3 . A-34
34. K3-160
3 5 . SV 1 N G
3 6 . PARK
37. BFB-35
38. PLUSH
39. FANFARE
4 0 . M A J E S T IC
41 . V A N T A G E
42. BONNIEBLUE
43. WTN-1-13
44 . W A B A S H
45 . A - 2 0
46. COMMON
4 7 . WTN H - 7
48 . A - 2 0 - 6
49. K 76-86-1

7.5
7.5
7.5
7.5
8.0
8.0
7.5
7.5
7.5
7.5
5.5
7.5
8.0
8.0
7.5
7.5
7.5
8.0
7.5
7.5
8.5
7.5
8.0
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.0
8.0
7.5
7.5
7.0
5.5
7.0
8.0
6.5
7.5
7.0
6.0
6.5
6.0
5.0
6.5
6.5
6.0

bluegrass

JUNE

7.5
8.0
8.0
8.5
8.5
8.0
8.5
8.0
7.5
8.5
8.5
7.5
7.5
7.5
8.0
7.5
7.5
7.5
7.5
8.0
7.5
6.5
7.5
7.5
7.5
8.0
7.5
7.5
7.5
7.0
7.5
5.5
7.5
7.5
7.5
7.5
6.5
7.5
7.5
6.5
6.5
7.5
7.5
7.5
7.5
7.5
7.5
7.0
6.5

color

JULY

8.5
8.5
8.0
8.5
8.5
8.5
8.5
8.5
8.5
8.0
8.0
7.5
8.0
7.0
8.0
8.0
8.0
8.0
8.0
8.5
8.0
8.0
7.5
8.0
7.5
8.0
7.0
7.5
7.5
7.5
6.5
7.5
7.5
7.5
8.0
7.0
7.5
8.0
7.5
7.0
7.0
7.5
7.5
7.5
7.0
7.0
6.5
7.0
6.5

ratings

for

the

1980

AUG

OCT

NOV

DEC

8.5
8.0
8.5
8.5
8.0
8.5
8.5
8.5
8.5
7.5
8.5
7.5
8.0
7.5
8.0
7.5
8.0
8.0
8.5
8.5
8.0
8.0
7.0
8.0
7.0
8.0
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.0
7.5
7.5
7.5
7.5
7.0
7.5
6.5
7.0
7.0
7.5
6.5
6.5
6.5

7.5
7.5
7.5
8.5
7.5
8.0
7.5
8.0
7.5
7.5
8.0
7.5
7.0
7.0
7.5
7.0
7.5
7.5
8.0
7.5
7.5
7.0
7.0
7.0
7.0
8.0
7.5
8.0
7.0
7.5
8.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
6.0
7.0
7.0

8.0
7.5
8.0
8.0
7.5
8.0
7.5
8.0
7.5
7.5
7.5
7.0
7.0
7.5
7.0
6.5
6.5
8.0
7.5
7.5
8.0
7.5
7.0
7.0
7.5
7.5
7.5
7.0
7.0
7.0
6.5
7.0
7.0
6.5
6.5
6.5
7.5
7.0
6.5
7.0
6.5
7.0
7.0
7.0
6.5
6.5
6.0
6.5
6.5

7.0
7.0
7.5
6.5
7.0
6.5
6.5
7.0
7.0
6.5
6.5
6.5
6.5
7.0
6.5
6.5
6.0
7.0
6.5
6.5
6.5
7.0
6.5
6.5
7.0
6.0
6.5
6.5
7.0
6.5
5.5
6.0
6.0
6.0
5.5
5.5
6.5
6.5
5.5
6.5
6.0
5.5
6.5
6.5
6.0
5.5
5.0
5.5
5.5

C o l o r is r a t e d a t 9 = d a r k e s t g r e e n a n d 1 = d e a d
6 or h i g h e r c o n s t i t u t e s a c c e p t a b l e c o l o r .

turf.

A rating

MEAN

8.0
8.0
8.0
8.0
8.0
8.0
8.0
8.0
8.0
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
6.5
6.5
6.5
6.5
6.5

of

PERENNIAL RYEGRASS CULTIVAR EVALUATIONS

Tables 3 and 4 contain information on the quality and color ratings for
22 cultivars of perennial ryegrass.

These perennial ryegrasses were seeded
2

on September 29, 1979 and received a total of four pounds Nitrogen/1000 ft
during the 1980 season.
stress.

The area was watered as needed to prevent drought

The values listed under each month are the means of ratings made on

three replicated plots.

Yearly means of all the months in which data were

taken are listed in the last column.

The yearly means are ranked in descend-

ing order.
One of the main problems with perennial ryegrasses in this area is winter
kill.

The past two winters in the Ames area have been very mild and there has

been no winter kill as of the spring of 1981. With the exception of cultivars
which have shown a poor mowing quality, the perennial ryegrasses have been
fairly uniform in their performance up to this time.

Table 3.
Perennial
g r o w i ng s e a s o n .

C U L T IVAR

1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21 .
22.

Y0RKT0WN
BL Y E S
LORETTA
CITATION
ELKA
FlESTA
DELRAY
PENNFINE
DIPLOMAT
BELLE
K5-88
MANHATTAN
REGAL
MED NORTH
DERBY
J186R24D
NK-20 0
G O A L IE
K5-94
CARAVELLE
NK-100
L 1 NN

Quality
of 6 or

ryegrass

quality

ratings

for

the

1980

MAY

JUNE

JULY

AUG

OCT

NOV

MEAN

8.0
7.5
8.0
8.0
8.0
8.0
8.0
8.0
8.0
8.0
8.0
8.0
8.0
8.0
8.0
8.0
8.0
8.0
8.0
6.5
7.5
6.5

8.0
8.5
8.5
7.5
8.0
8.0
8.0
8.0
7.5
8.0
7.5
8.0
7.0
8.0
7.5
8.0
8.0
8.0
7.5
6.0
7.0
6.5

8.0
8.0
7.5
8.0
8.0
8.5
8.0
8.0
8.0
8.0
7.5
7.0
8.5
7.5
8.0
7.0
7.0
7.0
6.5
7.0
6.5
6.5

8.0
8.0
7.0
8.0
7.0
8.0
8.0
8.0
8.0
7.5
7.0
7.5
7.0
8.0
8.0
6.5
7.0
7.0
7.0
6.0
6.5
5.5

9.0
8.5
7.5
8.5
8.0
8.0
8.5
7.5
8.0
8.5
8.0
7.5
7.0
7.5
7.0
6.0
6.5
6.5
6.5
6.0
6.0
5.0

9.0
8.0
8.0
8.0
8.0
8.0
8.0
7.5
8.0
8.5
7.5
7.5
7.0
7.5
7.0
6.5
6.5
6.5
7.0
6.5
6.5
5.0

8.5
8.0
8.0
8.0
8.0
8.0
8.0
8.0
8.0
8.0
7.5
7.5
7.5
7.5
7.5
7.0
7.0
7.0
7.0
6.5
6.5
6.0

1

is r a t e d a t 9 = b e s t
higher constitutes

qua 1 i ty and 1 = d e a d t u r f .
acceptable qualtiy.

A rating

Table 4.
Perennial
g r o w i ng s e a s o n .

ryegrass

C U L T IVAR

JUNE

JULY

AUG

OCT

NOV

DEC

MEAN

7.5
8.0
7.0
7.5
7.5
8.0
7.5
7.5
7.5
7.0
7.5
7.5
8.5
6.5
8.0
7.5
7.5
7.5
8.0
7.5
7.5
6.5

8.0
9.0
8.5
8.0
8.5
8.0
8.0
8.0
7.0
7.5
7.0
7.5
8.0
7.5
7.5
8.0
7.5
7.0
8.0
6.5
7.0
7.0

8.0
8.0
8.0
8.5
8.5
8.5
8.0
8.0
7.0
7.5
7.0
7.5
7.5
6.5
7.5
7.5
8.0
7.0
7.5
7.0
7.0
6.5

8.5
8.0
8.0
8.0
8.0
9.0
8.0
8.5
6.5
7.5
7.0
7.5
7.0
7.0
7.5
8.0
7.5
7.0
6.5
7.0
7.0
6.5

8.0
7.5
8.0
8.0
8.0
8.5
8.0
8.0
7.0
7.0
7.0
8.0
7.5
7.5
7.5
7.5
7.5
6.5
6.5
7.0
7.0
6.0

4.5
5.0
4.5
4.5
5.0
4.5
4.5
4.5
6.0
4.5
5.5
5.0
4.0
5.5
4.5
4.0
4.5
4.0
3.0
4.5
4.0
3.5

7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
6.5
6.5
6.5
6.5
6.0

1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11 .
12.
13.
14.
15.
16.
17.
18.
19.
20.
21 .
22.

BL Y E S
REGAL
CITATION
FlESTA
DERBY
Y0RKT0WN
DlPLOMAT
BELLE
J186R24D
K5-88
NK-200
MANHATTAN
LORETTA
CARAVELLE
MED-NORTH
DELRAY
PENNFINE
G O A L IE
ELKA
K 5-94
NK-100
LINN

C o l o r is r a t e d
of 6 of h i g h e r

color

ratings

at 9 = d a r k e s t g r e e n and
constitutes acceptable

for

the

1=dead turf.
color.

1980

A

rating

TALL FESCUE CULTIVAR TRIALS

Table 5 contains information on quality ratings for 20 tall fescue cultivars.

These cultivars were seeded on September 5, 1979.

They received three

2
pounds Nitrogen/1000 ft
vent drought stress.

in the 1980 season and were watered as needed to pre-

The values listed under each month are the means of

ratings on three replicated plots.

Yearly means of all the months in which

data were taken are listed in the last column.

The yearly means are ranked

in descending order.
This study is part of a national test being conducted by the USDA.
Similar plantings exist at many of the other universities in the country.
Tall fescues have very poor cold tolerance and Ames is on the northern edge
of the region in which this species will do well.

One of the primary concerns

of the Ames test is to evaluate winter hardiness.

Again, the past two winter

in Ames have been mild and no winter damage has been observed.

As of the

spring of 1981, the ratings for the various cultivars have been very uniform.

Table 5.
season.

Tall

fescue

quality

ratings

for

the

1980

growing

CULTIVAR

MAY

JUNE

JULY

AUG

OCT

NOV

MEAN

PHB-1-5
L-FZ-SYN 1
NJ-78
6
KENWELL
BELT KPH-1
BELT TF-11
BELT TF-25
T . F . 14801
KENHY
AG-125
BLEND 36-1
K 5-27
T-5
K E N T U C K Y 31
KENMONT
GOAR
BEL SYN 16-1
T.F. 14802
T.F. 14803
FAWN

6.5
6.5
6.5
7.0
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.0
6.0
6.5
6.5
1 .0

7.5
7.0
7.0
7.5
7.5
7.0
7.5
7.5
7.0
6.5
7.0
6.5
6.5
7.5
6.5
7.0
6.5
6.5
6.5
1 .5

7.5
7.5
8.0
7.5
7.5
8.0
8.0
7.5
7.0
7.5
8.0
7.5
7.5
7.5
7.0
7.5
7.5
7.5
7.5
4.5

7.5
7.5
7.5
7.5
7.0
7.5
8.0
7.5
7.0
7.5
7.0
7.0
7.5
7.0
7.0
7.0
7.5
7.0
7.5
6.5

7.5
7.5
8.0
7.5
7.5
7.5
8.0
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
6.5

7.5
8.0
8.0
7.0
7.5
7.5
8.0
7.5
7.5
7.5
7.0
7.0
7.5
7.0
7.5
7.0
7.5
7.5
7.5
6.5

7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
7.0
4.5

Quality
of 6 or

is r a t e d a t 9 = b e s t
higher constitutes

q u a l t i y and 1 = a e a d t u r f .
acceptable quality.

A

rating

FINE FESCUE CULTIVAR TRIALS

Tables 6 and 7 contain information on the quality and color ratings for
20 fine fescue cultivars.

These cultivars were seeded on August 29, 1979.
2

The study received four pounds Nitrogen/1000 ft
watered as needed to prevent drought stress.

in the 1980 season, and was

As before, the yearly means

are listed in descending order on the right.
The last five cultivars in Table 6 - Syn

W, Pennlawn, Engina, Rolax,

and Waldina - arrived late and were seeded in September of 1979.
not as fully established as the others in the spring of 1980.
for their low rating during the 1980 season.

They were

This accounts

Table 6.
Fine fescue
g r o w i ng s e a s o n .

CULTIVAR

1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.

quality

ratings

for

the

1980

JUNE

JULY

AUG

OCT

NOV

MEAN

FL-1
7.5
ENSYLVA
6.5
H IGHL IGHT 7 . 5
FORTRESS
7.5
JAMESTOWN 6.5
ATLANTA
7.0
DAWSON
6.5
SCALDI S
7.0
K4-21
7.0
7.5
CHECKER
CANADA
6.0
6.5
K 5-29
RUBY
5.5
B1L JART
5.5
TOURNAMENT6.5
SYN W
6.0
PENNLAWN
5.0
ENGINA
5.5
ROLAX
5.0
WALDINA
4.5

8.5
8.0
7.5
7.0
8.0
8.0
7.5
8.0
7.5
8.0
7.0
7.5
7.0
6.5
7.5
7.0
7.0
6.0
6.0
6.0

8.5
8.0
8.0
7.0
7.5
7.0
7.5
8.0
7.5
7.0
7.0
7.0
7.0
7.5
7.0
7.0
7.0
6.0
6.0
6.5

8.5
8.5
8.0
7.5
8.0
8.0
8.0
7.5
7.5
7.5
7.0
7.0
7.0
7.5
7.0
7.0
6.5
6.5
6.5
6.5

8.0
8.0
8.0
8.0
8.0
8.0
8.5
8.0
7.5
7.5
7.0
7.5
7.5
7.0
7.0
7.5
7.0
7.5
7.0
6.5

8.0
8.0
8.0
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.0
7.0
7.0
7.0
7.0
7.0
6.5
6.5
6.0
6.0

Q u a l i t y is r a t e d
A r a t i n g of 6 or

at 9 = b e s t q u a l i t y and l=dead t u r f .
higher constitutes acceptable quality.

Table 7.
Fine fescue
g r o w i ng s e a s o n .

C U L T IVAR

1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.

PENNLAWN
FL-1
ROLAX
BlLJART
SCALDI S
SYN W
WALDINA
FORTRESS
JAMESTOWN
ATLANTA
ENGINA
HIGL IGHT
TOURNAMENT
CANADA
K 5-29
DAWSON
ENSYLVA
K4-21
CHECKER
RUBY

color

MAY

JUNE

8.0
8.0
8.0
7.5
7.5
8.0
8.0
7.0
7.5
7.5
7.5
7.5
7.5
7.5
6.5
7.0
7.0
7.5
7.0
6.0

8.0
7.5
8.0
7.5
7.5
8.0
7.5
7.5
6.5
7.0
6.5
7.5
6.5
6.5
6.5
6.5
6.5
6.5
7.5
6.5

ratings

for

1980

JULY

AUG

OCT

NOV

MEAN

8.0
8.0
8.0
8.5
7.5
8.0
8.5
7.5
7.5
8.0
7.0
8.0
7.0
7.0
7.5
7.0
7.5
7.0
7.0
7.0

7.5
8.0
7.5
8.5
8.0
7.5
8.5
7.5
7.5
7.5
7.5
7.5
7.5
7.0
7.5
7.5
7.0
7.0
7.0
7.0

7.5
8.5
7.5
8.5
8.0
7.5
8.5
7.5
7.5
7.5
8.0
7.0
8.0
7.5
7.5
7.5
7.0
7.5
7.0
7.0

8.0
8.5
8.0
8.5
8.0
7.5
8.5
8.0
8.0
7.5
8.0
7.0
8.0
7.5
7.5
7.5
7.5
7.5
7.5
7.5

8.0
8.0
8.0
8.0
8.0
8.0
8.0
7.5
7.5
7.5
7.5
7.5
7.5
7.0
7.0
7.0
7.0
7.0
7.0
6.5

C o I o r is r a t e d a t 9 = d a r k e s t g r e e n a n d
of 6 or h i g h e r c o n s t i t u t e s a c c e p t a b l e

f

the

1 =d e a d t u r f .
color.

A rating

GROWTH REGULATOR STUDY
A growth retardant study was carried out on a common Kentucky bluegrass
turf at the research station in 1980.

The purpose of the investigation was

to observe the effects of four growth regulating chemicals on the growth and
quality of this turf.

The area was mowed at 2" prior to treatment and 2"

seven days after application.

Two applications were made on the area, a spring

application which was applied on May 12, 1980 and a summer application which
was applied on July 6.
The results following the first application can be found in Tables 8,
9 and 10.

Plots treated with Ethrel maintained an excellent quality through-

out the six week period following application.

The four and six lb a.i./a

treatments were found to be of a better quality than the control, which received no treatment.
The BAS 106 material had very little effect on the turf.
not inhibited and quality was not affected.

Growth was

The only exception was the

4.5 lb a.i./a rate applied to wet turf, which resulted in some growth reduction.
The MBR 12325 2S (Embark) and MBR 18337, which are both 3M products,
resulted in adequate growth retardation.
quite detrimetal to overall quality.

However, these materials were

THe MBR 18337 discolored the turf

badly at higher application rates, as did the MBR 12325, Table 9.
Results of observations made following the second application on July
6 can be found in Tables 8a, 9a and 10a.

Again, Ethrel was effective in

slowing growth and was observed to maintain a high quality.
The BAS 106 was very effective in controlling growth after the second
application; however, it was also quite detrimental to color and quality.
A similar thing, only in reverse, occurred with the MBR materials.

MBR

12325 and MBR 18337 were very effective following the first application,

but showed little effect following the July application.
The reason for these seasonal differences is not known.

It is not

unusual for differences of this kind to occur with the growth regulating
materials,

and much more work will be required before these chemicals

and their effects are fully understood.

Table 8.
Quality
appI i cat i o n .

ratings

on

the

growth

regulator

study

following

the

spring

DATE
TREATMENT

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

ETHREL
ETHREL
CONTROL
ETHREL
ETHREL
BAS 1 06 D R Y
BAS 1 06 D R Y
BAS 1 06 D R Y
BAS 1 06 W E T
B A S 1 06 W E T
M B R 12325 2S
M B R 12325 2S
M B R 12325 2S
M B R 18337 GR
MBR 18337 GR
MBR 18337 2EC
BAS 1 06 W E T
MBR 18337 2EC
MBR 18337 2EC
MBR 18337 GR

RATE

4
6
2
4+2
3
3 + 1 .5
4.5
3
3 + 1 .5
0.125
0.250
0.50
0.125
0.250
0.125
4.5
0.250
0.50
0.50

5-28

6-3

6-11

6-21

6-27

7-3

MEAN

9.0
8.5
9.0
8.0
9.0
8.5
8.5
8.5
8.5
9.0
6.5
6.5
6.0
8.0
7.0
6.5
8.0
6.0
6.0
5.5

9.0
8.5
9.0
8.0
9.0
8.5
8.0
8.0
8.5
8.0
6.5
7.0
6.5
7.5
7.0
7.0
7.5
6.0
6.0
5.5

9.0
9.0
9.0
8.5
9.0
8.0
8.0
8.0
8.0
7.5
7.0
7.0
7.0
6.5
6.0
7.0
7.5
6.0
6.0
5.5

9.0
9.0
9.0
8.5
9.0
8.0
7.5
7.5
7.5
7.5
8.0
7.5
7.5
6.5
6.0
8.0
6.5
7.5
6.5
5.0

8.5
8.5
8.0
8.5
7.5
7.0
6.5
7.0
6.5
7.0
9.0
9.0
9.0
8.5
8.5
8.5
7.0
9.0
9.0
8.0

8.5
9.0
8.0
8.5
7.5
7.0
6.5
6.5
6.5
7.0
9.0
9.0
9.0
9.0
9.0
9.0
6.5
9.0
9.0
8.5

9.0
9.0
8.5
8.5
8.5
8.0
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.0
7.0
7.0
6.5

Q u a l i t y is r a t e d a t 9 = b e s t q u a l i t y a n d 1 = d e a d
higher constitutes acceptable qualilty.

turf.

A rating

of

6

or

Table 9.
C o l o r ratings on the g r o w t h r e g u l a t o r study
s p r i n g a p p l i c a t i o n of g r o w t h r e g u l a t i n g c h e m i c a l s .

following

the

DATE
TREATMENT

RATE

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

4
4+2
6
2
3
3 + 1 .5
3 + 1 .5
0.125
0.125
4.5
3
4.5
0.250
0.50
0.1 25
0.250
0.250
0.50
0.50

CONTROL
ETHREL
ETHREL
ETHREL
ETHREL
BAS 106 D R Y
BAS 106 D R Y
BAS 106 W E T
M B R 1 2 3 2 5 2S
MBR 18337 2EC
BAS 106 D R Y
BAS 106 W E T
BAS 106 W E T
M B R 1 2 3 2 5 2S
MBR 12325 2S
MBR 18337 GR
MBR 18337 2EC
M B R 18337 GR
MBR 18337 2EC
MBR 18337 GR

5-28

6-3

6-11

6-21

6-27

7-3

MEAN

8.5
8.0
8.0
8.0
7.5
8.5
8.5
8.5
6.5
7.5
9.0
8.5
9.0
6.0
6.5
7.5
6.5
7.0
6.0
6.5

8.5
8.5
9.0
8.5
7.5
7.5
7.5
7.5
5.5
6.5
7.0
7.0
7.0
4.5
4.5
6.0
4.5
4.5
4.0
4.0

9.0
9.0
9.0
8.5
8.0
7.5
7.5
7.5
6.5
6.5
7.5
7.0
7.5
5.5
6.0
5.5
5.5
4.5
4.5
4.0

8.5
9.0
8.5
9.0
8.5
7.5
7.0
6.5
7.5
7.5
6.5
7.0
6.5
7.5
7.0
6.0
7.0
5.5
5.5
4.0

8.0
8.5
7.5
8.5
8.5
7.0
6.5
7.0
9.0
8.5
7.0
6.5
7.0
9.0
9.0
8.5
9.0
8.5
9.0
8.0

8.0
9.0
8.0
9.0
8.5
7.5
6.5
7.0
9.0
9.0
6.5
7.0
6.5
9.0
9.0
9.0
9.0
9.0
9.0
9.0

8.5
8.5
8.5
8.5
8.0
7.5
7.5
7.5
7.5
7.5
7.0
7.0
7.0
7.0
7.0
7.0
7.0
6.5
6.5
6.0

6 or

higher

C o l o r is r a t e d a t 9 = d a r k e s t g r e e n
constitutes acceptable color.

and

1=dead

turf.

A rating

of

Table 10.
M e a s u r e m e n t s m a d e o n t h e h e i g h t of
a p p l i c a t i o n of g r o w t h r e g u l a t i n g c h e m i c a l s .

growth

following

the

spring

DATE
TREATMENT

RATE

5-29

6-4

6-11

6-21

6-27

MEAN

16.0
18.5
16.5
15.5
15.5
18.5
19.5
17.5
20.0
18.5
17.0
18.0
20.0
18.5
18.0
18.5
19.0
19.5
19.5
26.5

16.5
19.5
18.0
16.5
16.0
2 1 .0
20.0
19.5
22.0
19.5
17.5
18.5
22.0
21.5
18.0
18.5
20.0
20.5
20.5
27.5

12.5
13.0
14.0
14.5
1 5.0
1 5.0
1 5.0
1 5.0
15.0
16.0
16.5
16.5
16.5
16.5
17.0
17.0
18.0
18.0
18.5
22.5

CM
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

MBR 18337 GR
MBR 18337 2EC
M B R 183 37 GR
ETHREL
ETHREL
M B R 1 2 3 2 5 2S
MBR 12325 2 S
MBR 18337 GR
MBR 18337 2EC
ETHREL
BAS 106 W E T
ETHREL
M B R 1 2 3 2 5 2S
MBR 18337 2EC
BAS 106 D R Y
BAS 106 W E T
BAS 106 DRY
BAS 106 W E T
BAS 106 D R Y
CONTROL

0.50
0.50
0.250
6
4+2
0.250
0.50
0.1 25
0.250
2
4.5
4
0.125
0.125
4.5
3 + 1 .5
3 + 1 .5
3
3

9.0
9.0
1 1 .5
13.5
14.0
9.5
10.5
1 1 .5
9.0
12.5
14.5
14.5
10.5
12.5
1 5.0
1 5.5
15.0
14.0
1 5.0
16.0

9.0
9.0
1 1 .5
13.5
14.0
1 1 .5
10.5
12.5
9.5
14.0
16.5
14.5
13.0
13.5
16.0
16.0
17.0
17.5
17.5
20.5

12.5
10.5
12.0
13.5
14.5
14.5
14.0
15.5
13.5
16.0
17.0
1 5.5
16.5
16.0
17.0
17.5
18.5
18.5
19.0
23.0

Table 8a.
the summer

Quality ratings
application.

on

the

growth

RATE
TREATMENT

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

lb. a . i ./a

CONTROL
ETHREL
ETHREL
ETHREL
ETHREL
M B R 1 2325 2S
M B R 1 2 3 2 5 2S
MBR 18337 GR
MBR 18337 GR
M B R 18337 GR
MBR 18337 2EC
MBR 18337 2EC
MBR 18337 2EC
M B R 1 2 3 2 5 2S
BAS 106 W E T
BAS 106 D R Y
BAS 106 D R Y
BAS 106 W E T
BAS 106 D R Y
BAS 106 W E T

4
2
4+2
6
0.125
0.250
0.1 25
0.250
0.50
0.1 25
0.250
0.50
0.50
3
3
3 + 1 .5
3 + 1 .5
4.5
4.5

regulator

study

following

DATE
8_1

8_6

8_1 9

8_27

9_3

MEAN

9.0
8.5
8.5
8.5
8.5
7.5
7.0
7.0
6.5
7.0
6.5
7.0
7.0
6.5
7.0
6.5
7.0
6.5
6.0
6.0

9.0
9.0
8.5
8.5
8.5
8.0
7.5
7.5
6.5
7.0
7.0
7.5
7.5
7.0
6.5
6.0
6.5
6.0
5.5
5.5

9.0
9.0
9.0
9.0
9.0
9.0
8.5
9.0
8.5
8.5
8.5
8.0
9.0
8.5
7.0
6.5
6.5
6.5
6.0
6.0

8.5
9.0
9.0
8.5
8.5
8.5
8.0
8.5
8.5
8.5
8.0
8.5
9.0
8.0
6.5
6.5
6.5
6.5
6.0
6.5

8.5
9.0
9.0
9.0
9.0
8.5
9.0
9.0
9.0
8.5
8.5
8.5
8.5
8.5
6.5
6.5
6.5
6.5
6.0
6.5

9.0
9.0
8.5
8.5
8.5
8.5
8.0
8.0
8.0
8.0
8.0
8.0
8.0
7.5
7.0
6.5
6.5
6.5
6.0
6.0

Table 9a.
the summer

Color
ratings
application.

on

the

growth

RATE
TREATMENT

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

lb. a.i./a

CONTROL
ETHREL
ETHREL
ETHREL
ETHREL
M B R 12325 2S
M B R 1 2325 2S
MBR 18337 GR
MBR 18337 GR
MBR 18337 GR
MBR 18337 2EC
M B R 1 2 3 2 5 2S
MBR 1 8337 2EC
MBR 1 8337 2EC
BAS 106 W E T
BAS 106 D R Y
BAS 106 D R Y
BAS 106 D R Y
BAS 106 W E T
BAS 106 W E T

2
4
4+2
6
0 . 125
0.250
0.125
0.250
0.50
0.50
0.50
0.125
0.250
3
3
3 + 1 .5
4.5
3 + 1 .5
4.5

regulator

study

following

DATE
8_1

8_6

8_1 9

8_27

9_3

MEAN

8.5
8.0
8.5
8.5
8.5
7.0
7.0
7.5
6.5
7.0
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.0
6.5
6.0

9.0
8.0
8.0
8.5
8.5
8.0
7.5
7.5
7.0
7.0
7.5
7.0
7.0
7.5
6.5
6.0
6.0
5.5
5.5
5.0

8.5
9.0
9.0
9.0
9.0
8.5
8.5
8.0
8.0
8.5
8.5
8.0
8.0
8.0
7.0
6.5
7.0
5.5
5.5
6.5

8.5
9.0
9.0
9.0
9.0
8.5
8.5
8.5
9.0
8.5
8.5
8.5
8.0
8.5
7.0
6.5
6.5
6.0
6.5
6.0

8.5
9.0
9.0
9.0
9.0
8.5
8.5
8.5
8.5
8.0
8.5
8.0
8.5
7.5
7.0
6.5
6.5
6.0
6.5
6.5

8.5
8.5
8.5
8.5
8.5
8.0
8.0
8.0
8.0
8.0
8.0
7.5
7.5
7.5
7.0
6.5
6.5
6.0
6.0
6.0

Table 10a.
application

Measurements made on
of growth r e g u l a t i n g

t h e h e i g h t of
chemicals.

RATE
TREATMENT

1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0

lb. a . i . / a .

BAS 106 D R Y
BAS 106 W E T
BAS 106 W E T
BAS 106 D R Y
BAS 106 D R Y
BAS 106 W E T
ETHREL
ETHREL
ETHREL
ETHREL
MBR 18337 GR
MBR 18337 2EC
MBR 18337 2EC
M B R 12325 2S
MBR 18337 GR
CONTROL
M B R 12325 2S
MBR 12325 2S
MBR 18337 GR
MBR 18337 2EC

4.5
4.5
3 + 1 .5
3 + 1 .5
3
3
4+2
6
2
4
0.125
0.125
0.250
0.250
0.250
0.125
0.50
0.50
0.50

growth

following

the

summer

DATE
7_31

8_6

8_19

8_27

9_3

9_19

MEAN

8.0
8.0
9.5
9.5
10.0
10.0
10.0
10.0
10.0
10.5
10.5
10.0
10.0
10.5
8.0
12.5
10.5
9.0
10.5
10.5

8.0
8.0
9.5
10.0
10.5
10.5
10.5
10.5
12.5
10.5
12.0
12.0
1 1.5
13.0
10.5
14.5
12.5
10.5
11.5
12.5

8.5
8.5
9.5
10.5
12.0
1 1.5
15.5
14.5
15.5
16.0
18.5
19.5
20.0
20.5
20.5
20.5
21.5
21.5
21.5
20.5

9.0
9.5
9.5
11.0
13.5
15.0
16.5
17.5
18.5
18.5
22.0
25.0
25.5
25.5
28.5
25.0
25.5
26.5
26.5
29.5

9.0
10.5
9.5
11.5
14.5
15.5
18.0
18.5
20.0
22.0
25.5
28.5
28.5
27.0
30.0
27.5
28.5
30.5
28.5
32.0

9.5
13.5
10.5
11.0
15.5
15.5
15.5
15.0
18.0
16.5
22.5
18.0
19.5
20.0
20.5
20.0
2 1 .0
21.5
20.0
22.0

8.5
9.5
10.0
10.5
12.5
13.0
14.5
14.5
15.5
16.0
18.5
19.0
19.0
19.5
19.5
20.0
20.0
20.0
20.0
2 1 .0

KENTUCKY BLUEGRASS MANAGEMENT STUDY

The Kentucky bluegrass management study was established on August 16, 1979.
The study which includes 10 cultivars of Kentucky bluegrass, is divided into
irrigated and non-irrigated sections.

Each cultivar is maintained at two
\

mowing heights, one and two inches,and is fertilized with IBDU at two rates,
2
one and three pounds Nitrogen/1000 ft /year.
The results of quality and color ratings can be found in Tables 11 thru
16.

When all of the data taken in 1980 were averaged, only Aquila, Sydsport,

and Touchdown had obtained an acceptable quality (Table 11).
Irrigated and non-irrigated sections of the study are compared in Tables
12 and 13.

Under irrigated conditiqns, Sydsport, Aquila, Glade, Touchdown

Majestic and fark were found to be acceptable.

The summer of 1980 was dry

and hot, and none of, the cultivars attained an acceptable rating under nonirrigated conditions.
The cultivars observed to have the best color were Glade, Baron and
Victa.
Again, the cultivars were seeded in the fall of 1979 and the low quality
ratings of some of them was probably due to a slow rate of establishment.

Table 11.
Overall quality means for irrigated
K e n t u c k y b l u e g r a s s e s in t h e m a n a g e m e n t s t u d y .

and

non-irrigated

CULT 1VARS

MAY

JUNE

JULY

AUG

SEPT

OCT

NOV

MEAN

1.
2.
3.
4.
5.
6.
7.
8.
9.
10.

5.5
5.5
5.5
5.5
5.0
5.5
5.0
4.5
4.5
4.5

4.5
4.5
5.0
4.5
4.5
4.5
4.0
4.0
4.0
4.0

6.0
6.0
6.0
5.5
5.5
5.5
5.0
5.0
5.0
5.0

6.0
6.0
6.0
5.5
5.5
5.5
5.0
5.0
5.0
5.0

6.0
6.0
6.0
6.0
5.0
5.0
5.5
4.5
4.5
4.0

6.0
6.5
6.0
6.0
5.0
5.0
5.0
4.5
4.5
4.5

6.5
6.5
6.5
6.5
6.0
6.0
5.5
5.5
5.0
5.5

6.0
6.0
6.0
5.5
5.0
5.0
5.0
4.5
4.5
4.5

A Q U 1 LA
SYDSPORT
TOUCHDOWN
MAJESTIC
PARK
GLADE
ADELPHI
MER1 ON
BARON
VICTA

Table 12.
Q u a l i t y m e a n s for the irrigated
i n c l u d e d in t h e m a n a g e m e n t s t u d y .

Kentucky

bluegrasses

C U L T 1VAR

MAY

JUNE

JULY

AUG

SEPT

OCT

NOV

MEAN

1 .
2.
3.
4.
5 .
6.
7 .
8.
9.
10.

5.5
5.0
5.5
5.5
5.5
5.0
5.0
4.5
5.0
4.5

5.0
5.0
5.0
5.0
5.0
4.5
4.5
4.5
4.0
3.5

7.0
6.0
6.5
6.5
6.0
6.0
6.0
5.5
5.5
5.0

7.0
6.5
6.5
6.5
6.5
6.0
6.0
6.0
5.5
5.5

7.0
6.5
6.0
7.0
7.0
5.5
6.0
5.0
5.0
4.0

7.5
6.5
6.0
7.0
6.5
6.0
6.0
5.0
5.0
4.5

7.0
6.5
6.0
6.5
6.5
5.5
6.0
6.0
5.0
5.0

6.5
6.0
6.0
6.0
6.0
6.0
5.5
5.0
5.0
4.5

SYDSPORT
A Q U 1 LA
GLADE
TOUCHDOWN
M A J E S T IC
PARK
ADELPH1
MERION
BARON
VICTA

Table 13.
included

Qu a 1 i ty m e a n s f o r t h e n o n - i rr i g a t e d K e n t u c k y
in t h e m a n a g e m e n t s t u d y

b 1 uegrasses

CULTIVAR

MAY

JUNE

JULY

AUG

SEPT

OCT

NOV

MEAN

1 .
2.
3.
4.
5.
6.
7.
8.
9.
10.

5.5
5.5
5.0
5.0
5.0
5.5
4.5
5.0
4.5
4.5

4.5
4.5
4.5
4.0
4.5
4.0
4.5
4.0
4.0
3.5

6.0
5.5
4.5
5.0
5.0
5.0
5.0
4.5
4.0
4.0

5.5
5.0
5.0
5.0
4.5
4.0
4.5
4.0
3.5
4.0

5.5
5.5
4.5
5.0
4.5
4.0
3.5
4.5
4.0
4.0

5.5
5.5
4.5
5.5
5.0
4.5
4.5
4.5
4.0
4.0

6.5
6.5
6.0
6.5
6.5
6.0
5.5
5.5
5.0
5.0

5.5
5.5
5.0
5.0
5.0
4.5
4.5
4.5
4.0
4.0

A Q U 1 LA
TOUCHDOWN
PARK
SYDSPORT
MAJESTIC
GLADE
V ICTA
ADELPH1
MERION
BARON

Table 14,
Overall color means for
non-irrigated Kentucky bluegrasses
study.

C U L T 1VAR

1. GLADE
2 . BARON
3 . VICTA
4. AQUILA
5. SYDSPORT
6. TOUCHDOWN
7. MAJESTIC
8. ADELPHI
9 . MER1 ON
10. PARK

JULY

AUG

SEPT

7.0
7.5
7.0
7.0
7.0
7.0
7.0
6.5
6.5
6.5

7.0
7.0
7.0
6.5
7.0
7.0
7.0
6.5
6.5
6.5

8.0
9.0
8.5
7.5
8.5
8.0
8.0
8.0
7.0
7.0

the irrigated and
in t h e m a n a g e m e n t

OCT

8.5
8.5
8.0
7.5
7.0
7.0
8.0
7.0
5.0
6.0

NOV

MEAN

6.5
5.0
5.5
6.0
5.0
5.0
6.5
5.0
4.0
4.0

7.5
7.5
7.5
7.0
7.0
7.0
7.0
6.5
6.0
6.0

Table 15.
Color means for the irrigated Kentucky
b l u e g r a s s e s i n c l u d e d in t h e m a n a g e m e n t s t u d y .
CULTIVAR

1.
2.
3.
4.
5.
6.
7.
8.
9.
10.

GLADE
BARON
V ICTA
A Q U I LA
TOUCHDOWN
MAJEST!C
SYDSPORT
ADELPH1
MER1 ON
PARK

JULY

AUG

SEPT

OCT

NOV

MEAN

7.0
7.0
7.0
6.5
7.0
6.5
6.5
6.5
6.5
6.0

7.0
7.0
7.0
6.5
7.0
6.5
6.5
6.0
6.5
6.0

8.0
9.0
9.0
7.5
8.5
7.5
8.0
8.0
7.5
7.0

8.5
9.0
8.5
7.0
6.5
7.5
6.0
6.5
4.5
5.0

8.0
6.5
6.5
6.5
5.5
6.5
5.5
6.0
4.0
4.0

7.5
7.5
7.5
7.0
7.0
7.0
6.5
6.5
6.0
5.5

Table 16.
C o l o r m e a n s f o r t h e non-irrigated Kentucky
b l u e g r a s s e s i n c l u d e d in t h e m a n a g e m e n t s t u d y .
CULTIVAR

1. GLADE
2. SYDSPORT
3. MAJESTIC
4 . A Q U I LA
5 . BARON
6 . VICTA
7. ADELPHI
8. TOUCHDOWN
9. MERION
10. PARK

JULY

AUG

SEPT

OCT

NOV

ME AN

7.5
7.5
7.0
7.0
7.5
7.5
7.0
7.5
7.0
6.5

7.5
7.5
7.5
7.0
7.0
7.0
7.0
7.0
7.0
7.0

8.5
8.5
9.0
8.0
8.5
8.0
8.0
7.5
6.5
7.0

8.5
8.0
8.5
8.0
8.5
7.5
7.5
7.0
5.5
6.5

5.5
5.0
6.0
5.0
4.0
5.0
4.5
4.0
4.0
4.0

7.5
7.5
7.5
7.0
7.0
7.0
7.0
6.5
6.0
6.0

PERENNIAL RYEGRASS MANAGEMENT STUDY

The Perennial ryegrass management study, like the Kentucky bluegrass
management study, includes 10 cultivars and is divided into irrigated and
non-irrigated sections.
one and two inches.

Each cultivar is maintained at two mowing heights,

Each plot is divided into two fertilizer treatments,
2

one and three pounds Nitrogen/1000 ft , applied as IBDU.

The study was

established on August 16, 1979.
The results of quality and color ratings can be found in Tables 17
thru 22.

Loretta, Manhattan, and Yorktown were the only cultivars which

maintained an acceptable quality over the entire season on both irrigated
and non-irrigated areas.

On the irrigated section of the area all culti-

vars except Caravelle and Linn maintained an acceptable quality throughout
the season.
able.

On the non-irrigated area, none of the cultivars were accept-

Loretta, Manhattan, and Pennfine were the three best cultivars on

the non-irrigated area.
All of the cultivars maintained an acceptable color on both irrigated
and non-irrigated areas.

Table 17.
O v e r a l l quality ratings for
p e r e n n i a l r y e g r a s s e s in t h e m a n a g e m e n t

irrigated
study.

and

non-irrigated

C U L T 1VAR

MAY

JUNE

JULY

AUG

SEPT

OCT

NOV

1 . LORETTA
2. MANHATTAN
3 . YORKTOV/N
4. PENNFINE
5. DERBY
6. CITATION
7. DIPLOMAT
8 . NK 2 0 0 •
9. CARAVELLE
10. LINN

5.0
5.5
5.0
5.0
4.5
5.5
4.5
5.0
3.0
3.5

5.0
5.0
4.5
4.5
4.5
5.0
5.0
4.5
4.0
4.0

6.5
6.0
6.0
6.0
6.0
6.0
6.0
5.5
5.0
5.5

6.0
6.0
6.0
6.0
6.0
6.0
6.0
5.5
5.0
5.5

6.0
6.0
6.0
6.0
6.0
6.0
6.0
5.0
4.5
4.0

6.5
6.5
6.5
6.0
6.0
6.0
6.0
5.0
5.0
4.5

6.5
6.5
6.5
6.0
6.5
6.0
6.0
5.5
5.0
5.0'

MEAN

6.0
6.0
6.0
5.5
5.5
5.5
5.5
5.0
4.5
4.5

Table 18. Quality ratings for the irrigated perennial ryegrasses
included in the management study.

CULT IV AR

MAY

JUNE

JULY

AUG

SEPT

OCT

NOV

MEAN

1.

Loretta

5.5

5.5

7.0

7.5

8.0

8.0

7.5

7.0

2.

Yorktown

5.0

5.0

6.5

7.0

8.0

8.0

7.5

7.0

3.

Manhattan

6.0

5.0

6.5

7.0

7.5

7.5

7.5

6.5

4.

Pennfine

5.5

5.0

6.5

7.0

8.0

7.5

7.0

6.5

5.

Derby

5.0

5.0

6.5

7.0

7.5

7.0

7.0

6.5

6.

Citation

5.0

5.0

6.0

7.0

7.5

7.5

6.5

6.5

7.

Diplomat

5.5

5.0

6.5

7.0

7.5

7.5

7.5

6.5

8.

NK 200

5.0

4 . 5*-

6.0

6.5

6.5

6.0

6.5

6.0

9.

Caravelle

3.0

4.0

5.5

5.5

6.0

6.0

6.0

5.0

Linn

3.0

4.0

6.0

6.5

4.5

4.5

5.0

4.5

10.

Table 19. Quality ratings for the non-irrigated perennial ryegrasses
included in the management study.

CULT IV AR

MAY

JUNE

JULY

AUG

SEPT

OCT

NOV

MEAN

1.

Loretta

4.5

4.5

5.5

4.5

4.5

4.5

5.0

5.0

2.

Manhattan

5.0

5.0

5.5

5.0

4.5

5.0

5.0

5.0

3.

Pennfine

4.5

4.5

5.5

5.0

4.5

5.0

5.0

5.0

4.

Derby

4.0

4.5

5.5

5.0

4.5

5.0

5.5

5.0

5.

Citation

5.5

4.5

5.5

4.5

4.0

4.5

5.0

5.0

6.

Yorktown

4.5

4.5

5.5

5.0

4.5

5.0

5.0

5.0

7.

NK 200

4.5

4.5

5.0

4.5

4.0

4.0

4.5

4.5

8.

Diplomat

4.0

4.5

5.5

5.0

4.0

4.5

5.0

4.5

9.

Caravelle

3.5

4.0

4.5

4.0

3.5

4.0

4.0

4.0

Linn

4.0

3.5

5.0

4.5

4.0

4.0

4.5

4.0

10.

Table 20,
O v e r a l l c o l o r r a t i n g s for the irrigated and
n o n - i r r i g a t e d p e r e n n i a l r y e g r a s s e s in t h e m a n a g e m e n t
study.

CULTIVAR

1.
2.
3.
4.
5.
6.
7.
8 .
9.
10.

CITATION
DlPLOMAT
YORKTOV/N
CARAVELLE
LORETTA
MANHATTAN
PENNF1NE
NK 2 0 0
DERBY
LINN

JULY

AUG

SEPT

OCT

NOV

MEAN

6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.0
6.5
6.0

7.0
7.0
7.0
7.0
6.5
7.0
7.0
6.5
7.0
7.0

8.0
7.5
7.5
7.5
7.0
7.0
7.5
6.5
7.0
6.0

7.5
7.0
7.5
7.0
7.5
7.0
7.0
6.0
6.5
5.5

6.5
6.5
6.5
6.5
6.0
6.5
6.0
6.5
6.5
5.5

7.0
7.0
7.0
7.0
6.5
6.5
6.5
6.5
6.5
6.0

Table 21.
ryegrasses

Color ratings for
in t h e m a n a g e m e n t

C U L T IVAR

1. YORKTOWN
2. PENNFINE
3. DERBY
4. CITATION
5. DIPLOMAT
6. LORETTA
7. MANHATTAN
8 . NK 2 0 0
9. CARAVELLE
10. LINN

the irrigated
study.

perennial

JULY

AUG

SEPT

OCT

NOV

MEAN

7.0
7.5
7.0
7.0
7.0
6.5
7.0
6.5
7.0
6.5

7.0
7.5
7.5
7.0
7.0
7.0
6.5
6.5
7.0
6.5

9.0
8.5
7.5
8.5
8.5
7.5
7.5
7.5
8.0
6.0

9.0
8.0
7.5
8.0
8.0
8.5
7.5
6.5
7.5
5.5

7.0
6.0
7.0
7.0
7.0
6.5
7.0
7.0
6.5

8.0
7.5
7.5
7.5
7.5
7.0
7.0
7.0
7.0

6.0

6.0

Table 22.
Color ratings for the non-irrigated
p e r e n n i a l r y e g r a s s e s in t h e m a n a g e m e n t s t u d y .

C U L T IVAR

1 .
2.
3.
4.
5.
6.
7.
8.
9.
10.

MANHATTAN
CITATION
DlPLOMAT
CARAVELLE
LORETTA
PENNFINE
NK 2 0 0
DERBY
YORKTOWN
L INN

JULY

AUG

SEPT

OCT

NOV

MEAN

6.0
6.0
5.5
6.0
6.0
6.0
5.5
6.0
5.5
5.5

7.0
7.0
7.0
7.0
6.5
6.5
6.5
6.5
7.0
7.0

6.5
7.0
6.5
7.0
6.0
6.5
6.0
6.5
6.0
6.0

6.0
6.5
6.0
7.0
6.0
6.0
6.0
6.0
6.5
6.0

6.0
6.0
6.0
6.5
5.5
5.5
6.5
6.0
6.0
5.5

6.5
6.5
6.5
6.5
6.0
6.0
6.0
6.0
6.0
6.0

FINE FESCUE MANAGEMENT STUDY

The Fine Fescue Management study includes the following cultivars:
1.
2.
3.
4.

Pennlawn Red Fescue
Scaldis Hard Fescue
Ruby Red Fescue
Atlanta Chewings Fescue

5.

K5-29 Red Fescue

6.
7.
8.
9.

Dawson Red Fescue
FL-1 Hard Fescue
Ensylva Red Fescue
Highlight Chewings Fescue

10.

Jamestown Chewings Fescue

The study includes only an irrigated section.

Non-irrigated areas

were not included in this study.

Each cultivar is maintained at two mow-

ing heights, one and two inches.

Each plot is divided into two fertilizer
2

treatments; one and three lbs. Nitrogen/1000 ft , applied as IBDU.

The

study was established on September 8, 1979.
The results of quality and color ratings can be found in Tables 23
and 24.
During this first year of the study, the Hard Fescues, Scaldis and
FL-19performed best.

These two cultivars performed exceptionally well•

at the one inch mowing height.

The low rating for Pennlawn was due to

the fact that this cultivar was established somewhat later than the
others.
Jamestown, Pennlawn and Scaldis maintained the best color throughout the season.

Table 23.
Quality ratings
i n c l u d e d in t h e m a n a g e m e n t

for the
study.

ten

Fine

Fescue

cultivars

C U L T 1VAR

MAY

JUNE

JULY

AUG

OCT

NOV

MEAN

1 . S C A L D 1S
2 . FL-1
3. ATLANTA
4. DAWSON
5. ENSYLVA
6. JAMESTOWN
7. K5-29
8. HIGHLIGHT
9 . RUBY
10. PENNLAWN

7.0
6.5
6.5
6.0
6.0
6.5
6.0
6.0
5.5
3.5

6.0
6.0
6.5
6.0
6.0
5.5
5.5
5.0
5.0
4.5

7.5
7.5
7.0
7.0
7.0
7.0
6.0
6.0
5.5
4.5

7.5
7.5
7.0
7.0
6.5
7.0
6.0
6.5
6.0
5.0

6.5
7.0
6.5
6.5
6.5
6.5
5.5
6.0
5.5
5.0

7.0
7.0
7.0
7.0
7.0
7.0
6.0
6.0
6.0
5.0

7.0
7.0
6.5
6.5
6.5
6.5
6.0
6.0
5.5
4.5

Table 2 4 . Color ratings for
included
in t h e m a n a g e m e n t

t h e 10 F i n e
study.

CULTIVAR

1.
2.
3.
4.
5.
6.
7.
8.
9.
10.

JAMESTOWN
PENNLAWN
SCALDIS
RUBY
ATLANTA
DAWSON
FL-1
ENSYLVA
HIGHLIGHT
K5-29

Fescue

cultivars

JULY

AUG

OCT

NOV

DEC

MEAN

7.0
7.5
6.5
6.0
6.5
7.0
7.0
7.0
6.5
6.0

7.0
7.5
7.5
7.0
7.0
7.0
7.5
6.5
7.0
7.0

8.0
7.5
7.5
7.0
7.0
7.5
7.5
7.0
7.5
7.0

7.5
7.0
7.0
7.0
7.0
7.5
7.0
7.0
7.0
7.0

5.0
4.0
4.5
4.5
4.5
5.0
4.0
4.5
4.5
4.0

7.0
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.5
6.0

FALL TOPDRESSING STUDY

A fall topdressing study was begun in November of 1980 on both
the modified soil (1-1-1) and native soil,Penncross creeping bentgrass
greens at the research station.

Three different treatments were included;

a) a 70-10-20 (sand-soil-peat) mix

b) a 1-1-1 topdressing mix and

a control area where no topdressing was applied.
applied at a depth of 1/4 inch.

c)

The treatments were

Each topdressing treatment was further

divided into three fertilizer treatments; a) no nitrogen,

b) 0.5 lb N/1000 ft

2

and c) 1 lb N/1000 ft .

The plots were then further split into two fung2

icide treatments; a) Chloroneb 9 ounces/1000 ft

(Tersan SP) and b) Benomyl

2

2 ounces/1000 ft

(Tersan 1991).

The treatments applied to the native soil

area were exactly the same as those applied to the modified soil.
The winter of 1980-81 was very dry and no snow mold occurred on the
greens involved in the study.
The results of color ratings made on the greens can be found in Table 25.
The modified soil area 'greened upT much slower than did the native soil
area.

The modified soil area has a lower water holding capacity and this

would be expected after a dry winter.

The topdressed areas on both greens

turned green much earlier than did the controls, which received no topdressing.

There were no real differences between the 70-10-20 and 1-1-1

topdressing mixes on either area.
Winter Kill, as it was affected by topdressing treatments and N fertilization, was also evaluated.

The results can be found in Table 26.

The modified soil green was damaged to a far greater degree than was the
native soil green.

The control plots were also damaged to a greater

extent than were the areas which were topdressed.

Increasing the rate of

2

N from 0 to 1 lb N/1000 ft

(urea), just prior to topdressing in the fall,

decreased winter kill, particularly on the modified soil.
The effects of late season applications of N may be very different
under snow cover and I do not recommend this practice be followed based
on just one year's data showing a positive effect.
I plan to continue this research in the future.

Next winter I hope

that we can expand the study to include temperature monitoring equipment
in the soil beneath the plots.

I feel that there are many advantages

to heavy fall topdresssing applications on golf course greens in the
midwestern region and you will be hearing more about this practice in
the future.

FALL TOPDRESSING STUDY

B
X

A

2

C

.

X

A

Y

1

—

B

C

B

1

Y
B

Y

1

C

B

C

Y

3

C
Y

—

-

A

Y

3

B

C

X

2

A

B

2

• -

A

-

—

A

X

C

3

Y

1.

Control

2.

70-10-20 Topdressing (.77 cu. yd./lOOO ft 2 )

3.

1-1-1 Topdressing (.77 cu. yd./lOOO ft 2 )

a

Control

-

A

Y

X

X

B

X

X

A

C
.

X

Y

A

c

b.

.5 lb. N (urea)/1000 ft 2

c.

1 lb. N (urea)/1000 ft 2
2

x.

Chloroneb 9 oz./lOOO ft

y.

Benomyl 2 oz./lOOO ft 2

B
...

Table 25. Color ratings for the modified (1-1-1-) soil green and
the native soil green in the spring of 1981.

Date
Treatment

April 7

Modified Soil
70-10-20

April 17

April 24

May 8

Mean

7.0*

7.0

7.0

6.0

6.5

1-1-1-

6.5

7.0

6.5

5.5

6.5

Control

3.5

5.5

5.5

4.5

4.5

Native Soil
1-1-1-

8.5

8.5

8.5

8.0

8.5

70-10-20

8.5

8.5

8.5

7.5

8.0

Control

4.5

7.5

7.5

6.5

6.5

*Color ratings are based on a scale of 9-1, where 9 = best color,
1 = dead turf and a rating of 6 constitues an acceptable quality.

Table 26. Winter kill ratings for both modified and native soil
greens based on data taken April 17, 1981.

Topdressing Treatment
Green

Control
0* 0.5 1.0

70-10-20
0 0.5
1.0

0

1-1-1
0.5

1.0

Modified

3.3**

4.5

5.6

6.7

8.0

8.4

5.0

7.3

8.0

Native

7.2

7.3

8.7

8.8

9.0

9.0

8.8

9.0

9.0

*Pounds of N/1000 ft
in November, 1980.
**9 = no damage;

applied just prior to topdressing treatments

1 = dead turf