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Subject: Aphids--Biological control
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Subject: Apples--Diseases and pests
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Subject: Pests--Biological control
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Apples--Diseases and pests
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Biological studies on Aphidoletes aphidimyza (Rondani) (diptera:cecidomyiidae) and its use in biological control of the apple aphid Aphis pomi Degeer (homoptera:aphididae)
Morse, Joseph Grant
Text (1981)
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