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Selection for monocrotophos resistance in pear psylla, Cacopsylla pyri (L.) (Hom., Psyllidae)
Author(s) -
Berrada S.,
Nguyen T. X.,
Merzoug D.,
Fournier D.
Publication year - 1995
Publication title -
journal of applied entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.795
H-Index - 60
eISSN - 1439-0418
pISSN - 0931-2048
DOI - 10.1111/j.1439-0418.1995.tb01326.x
Subject(s) - monocrotophos , biology , pear , toxicology , pyrus communis , horticulture , insecticide resistance , cross resistance , pest analysis , pesticide resistance , botany , pesticide , agronomy , chemical control , virology
Pear 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).