Toxicity of a number of pesticides to strains ofTyphlodromus pyri andAmblyseius andersoni (Acari: Phytoseiidae) |
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| Authors: | C. Duso P. Camporese L. P. S. van der Geest |
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| Affiliation: | (1) Institute of Agricultural Entomology, University of Padua, Italy;(2) Department of Pure and Applied Ecology, University of Amsterdam, The Netherlands |
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| Abstract: | Side effects of ten pesticides used in orchards and vineyards were tested with a laboratory method on several Dutch and Italian strains of the predatory mitesTyphlodromus pyri Scheuten andAmblyseius andersoni (Chant). Resistant and susceptible strains of both species were studied. Results showed that a test which evaluates mortality of various developmental stages and fecundity of adult females is better than one that measures only survival of adult females. A definite resistance to certain pesticides was found in ItalianT. pyri andA. andersoni. The level of resistance to parathion, azinphos-methyl and carbaryl was particularly high in some strains ofA. andersoni. The high level of resistance to certain pesticides was often associated with a marked reduction in fecundity. |
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| Keywords: | Typhlodromus pyri Amblyseius andersoni pesticides side effects resistance |
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