Control of the Apple Maggot and Plum Curculio with Soil Insecticides

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Abstract
The effectiveness of several soil insecticides was evaluated for control of soil inhabiting stages of the apple maggot, Rhagoletis pomonella, from 1957 through 1960. Limited studies on their effectiveness for control of similar stages of the plum curculio, Conotrachelus nenuphar were made in 1959 and 1960. Endrin averaged 97% and dieldrin 64% reduction of emerging apple maggot adults over the check population. Heptachlor and aldrin were less effective. All insecticides controlled the plum curculio. Soil residue determinations made in 1960 showed there was a close correlation between the control recorded and the insecticidal residue present. Endrin was the most persistent with 17% and heptachlor and aldrin the least persistent with 4% recovery of the applied toxicants. The results indicate that an annual application of endrin, as recommended for orchard mice, might also control the apple maggot and plum curculio.

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