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Insecticide resistance in Bemisia tabaci (Homoptera: Aleyrodidae) populations from Crete
Author(s) -
Roditakis Emmanouil,
Roditakis Nikos E,
Tsagkarakou Anastasia
Publication year - 2005
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.1029
Subject(s) - bifenthrin , biology , imidacloprid , cypermethrin , endosulfan , homoptera , pyrethroid , toxicology , pest analysis , population , veterinary medicine , agronomy , botany , pesticide , demography , sociology , medicine
The resistance levels to α‐cypermethrin, bifenthrin, pirimiphos‐methyl, endosulfan and imidacloprid were determined in Bemisia tabaci (Gennadius) from Crete. Five B tabaci populations collected from greenhouse and outdoor crops were bioassayed and compared with a reference susceptible strain. Bemisia tabaci collected in a floriculture greenhouse exhibited the highest resistance against all insecticides: at LC 50 , resistance factors were 23‐fold for bifenthrin, 80‐fold for α‐cypermethrin, 18‐fold for pirimiphos‐methyl, 58‐fold for endosulfan and 730‐fold for imidacloprid. A population collected on outdoor melons was more susceptible than the reference strain against all insecticides tested, suggesting the occurrence of local highly susceptible B tabaci populations in ‘refugia’. In pairwise comparisons of resistance levels, correlation was observed between the LC 50 values of the pyrethroid insecticides bifenthrin and α‐cypermethrin. Copyright © 2005 Society of Chemical Industry