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Evaluation of metabolic detoxifying enzyme activities and insecticide resistance in Frankliniella occidentalis
Author(s) -
Maymó Ana C,
Cervera Amelia,
Sarabia Raquel,
MartínezPardo Rafael,
Garcerá M Dolores
Publication year - 2002
Publication title -
pest management science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.296
H-Index - 125
eISSN - 1526-4998
pISSN - 1526-498X
DOI - 10.1002/ps.558
Subject(s) - thrips , biology , pest analysis , western flower thrips , esterase , pesticide , strain (injury) , toxicology , carboxylesterase , integrated pest management , agriculture , insecticide resistance , detoxification (alternative medicine) , agricultural pest , agrochemical , resistance (ecology) , thripidae , horticulture , enzyme , agronomy , ecology , biochemistry , anatomy , agricultural science , medicine , alternative medicine , pathology
The western flower thrips Frankliniella occidentalis (Pergande) is a very significant pest of a number of different agricultural crops in the south‐east of Spain. The importance of thrips as a pest is not due mainly to the direct damage inflicted on the plant, but to the loss in commercial value which occurs as a consequence of the development of dark spots caused by the tomato spotted wilt virus (TSWV) which they transmit. The economic threshold is therefore almost zero, which enhances the problems of resistance management. The present work is part of a global project that attempts to evaluate the status of insecticide resistance in field populations of thrips obtained from several agricultural crops. We have studied, in either individual or pooled insects, some enzyme systems classically related to detoxification of insecticides: esterases and glutathione‐ S ‐transferase (GST). The activity of these enzymes from laboratory populations selected with various classes of insecticides has also been measured using several appropriate substrates. An increase in GST mean activity was found in two field‐collected strains. Differences in frequency distributions of esterase and GST activities were found for both field‐collected strains and for a laboratory strain selected with acrinathrin. These activities were compared with those of a wild‐type reference strain. © 2002 Society of Chemical Industry