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Effect of pretreatment with piperonyl butoxide on pyrethroid efficacy against insecticide‐resistant Helicoverpa armigera (Lepidoptera: Noctuidae) and Bemisia tabaci (Sternorrhyncha: Aleyrodidae)
Author(s) -
Young Susan J,
Gunning Robin V,
Moores Graham D
Publication year - 2006
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.1127
Subject(s) - piperonyl butoxide , helicoverpa armigera , pyrethroid , noctuidae , biology , toxicology , esterase , lepidoptera genitalia , botany , agronomy , pesticide , biochemistry , enzyme
Pyrethroid resistance in B‐type Bemisia tabaci Gennadius and Australian Helicoverpa armigera Hübner field populations is primarily conferred by esterase isoenzymes which metabolise and sequester pyrethroid insecticides. It has been shown previously that pyrethroid resistance‐associated esterases in H. armigera are inhibited by the insecticide synergist piperonyl butoxide (PBO) over a 22‐h period. It is demonstrated here that similar inhibition can be obtained against B‐type B. tabaci . Small‐scale field trials showed excellent levels of pyrethroid control when insects were pretreated with PBO and then dosed with pyrethroid during the time of maximum esterase inhibition. These results demonstrate that PBO can restore pyrethroid efficacy in the field against both B‐type B. tabaci and resistant H. armigera . Copyright © 2005 Society of Chemical Industry