Effect of pretreatment with piperonyl butoxide on pyrethroid efficacy against insecticide-resistant Helicoverpa armigera (Lepidoptera: Noctuidae) and Bemisia tabaci (Sternorrhyncha: Aleyrodidae)

• Published in: Pest management science Vol. 62; no. 2; pp. 114 - 119
• Main Authors: Young, S.J, Gunning, R.V, Moores, G.D
• Format: Journal Article
• Language: English
• Published: Chichester, UK John Wiley & Sons, Ltd 01.02.2006; Wiley; Wiley Subscription Services, Inc
• Subjects: Animal populations; Animals; application rate; Bemisia tabaci; Biological and medical sciences; Control; enzyme activity; Enzyme Inhibitors; esterase; esterases; Esterases - antagonists & inhibitors; Fundamental and applied biological sciences. Psychology; Gossypium hirsutum; Helicoverpa armigera; Hemiptera - enzymology; insect control; insect pests; Insecticide Resistance; Insecticides; Insects; Kinetics; mechanism of action; Moths - enzymology; Pesticide Synergists; Phytopathology. Animal pests. Plant and forest protection; Piperonyl Butoxide; plant pests; Protozoa. Invertebrates; Pyrethrins; pyrethroid; pyrethroid insecticides; resistance; Resistance to control; Insecticide; Helicoverpa armigera; Enzyme; Insecta; Treatment efficiency; Pesticides; Piperonyl butoxide; Pyrethroids; Esterases; resistance; Pest; Homoptera; Pest management; Arthropoda; Bemisia tabaci; Lepidoptera; Hydrolases; Aleyrodidae; esterase; Noctuidae; Pretreatment; Pesticide resistance; Invertebrata; pyrethroid
• ISSN: 1526-498X; 1526-4998
• DOI: 10.1002/ps.1127

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.