Effects of five insecticides used in apple orchards on Hyaliodes vitripennis (say) (Hemiptera: Miridae) |
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| Authors: | N J Bostanian N Larocque C Vincent G Chouinard Y Morin |
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| Institution: | 1. Horticultural Research and Development Centre , Agriculture and Agri‐Food Canada , 430 Gouin Blvd., St‐Jean‐sur‐Richelieu, Qc, J3B 3E6, Canada;2. Institut de Recherche et de Développement en Agroenvironnement , St. Hyacinthe, Qc, J2S 7B8, Canada;3. Agrilus Inc. , P. O. Box 234, St. Alexandre d'Iberville, Qc, JOJ 1SO, Canada |
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| Abstract: | Abstract Azinphos‐methyl, carbaryl, dimethoate, phosmet and phosalone were used in apple orchards to manage apple aphid, apple maggot, woolly apple aphid and leaf eating caterpillars. Among the five insecticides evaluated, dimethoate, carbaryl and azinphosmethyl were the most toxic to the nymphs and adults of Hyaliodes vitripennis (Say) from two regions. Phosalone was the least toxic. Nymphs were more resistant than the adults. While the LC50 for dimethoate was 130 ppm for nymphs, it was 3 ppm for adults from St. Jean‐Baptiste‐de‐Rouville. There were also significant differences in the level of resistance between the two regions where the H. vitripennis were collected. At St. Alexandre the LC50 for phosalone on nymphs was 19, 250 ppm whereas, at St. Jean‐Baptiste‐de‐Rouville it was 160, 000 ppm. |
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| Keywords: | Toxicity Hyaliodes vitripennis (Say) apple orchards biological control |
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