Abstract
AbstractPear psylla, Cacopsylla pyri (L.), adults collected from commercial pear orchards around Toulouse (France) were selected in the laboratory for resistance to monocrotophos. Resistance was obtained only when the insecticide selection pressure was continuous, but when some generations were not selected, resistance did not develop or even reverted. Resistance appeared to be stable after 30 generations of selection and stabilized at a level of 140‐fold. The monocrotophos‐selected strain was highly cross‐resistant to the organophosphate phosmet (155‐fold) and cross‐resistant to the formamidine amitraz (14‐fold).
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Schedule a callMore From: Journal of applied entomology = Zeitschrift fur angewandte Entomologie
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