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.
Résumé
Les effects secondaires de 10 pesticides fréquemment employés dans les vergers et les vignobles ont été étudiés en laboratoire sur 8 souches d'acariens prédateursTyphlodromus pyri etAmblyseius andersoni. Ces effects ont été testés sur des souches considérées comme sensibles ou résistantes au parathion au cours d'essais préliminaires. Certaines souches ont démontré une certaine tolérance ou résistance à plusieurs pesticides. Un haut facteur de résistance au parathion, azinphos-méthyl et carbaryl a été trouvé dans des souches deA. andersoni originaires de cultures différentes mais une réduction marquée de la fécondité a été démontrée après l'emploi de certaines insecticides. Les résultats montrent l'importance qu'il y a d'évaluer non seulement la mortalité ou le facteur de résistance aux pesticides mais aussi l'effet sur la fécondité des femelles adultes. Ces aspects sont discutés dans le cadre de la lutte intégrée.
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Duso, C., Camporese, P. & van der Geest, L.P.S. Toxicity of a number of pesticides to strains ofTyphlodromus pyri andAmblyseius andersoni (Acari: Phytoseiidae). Entomophaga 37, 363–372 (1992). https://doi.org/10.1007/BF02373110
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DOI: https://doi.org/10.1007/BF02373110