Esterase-mediated resistance to pyrethroids in field populations of Helicoverpa armigera (Lepidoptera: Noctuidae) from Central Africa

Achaleke Joseph, Martin Thibaud, Ghogomu Richard T., Vaissayre Maurice, Brévault Thierry. 2009. Esterase-mediated resistance to pyrethroids in field populations of Helicoverpa armigera (Lepidoptera: Noctuidae) from Central Africa. Pest Management Science, 65 (10) : 1147-1154.

https://doi.org/10.1002/ps.1807

Article de revue ; Article de revue à facteur d'impact

Version publiée - Anglais
Accès réservé aux personnels Cirad
Utilisation soumise à autorisation de l'auteur ou du Cirad.
document_550991.pdf
Télécharger (168kB)

Quartile : Q1, Sujet : ENTOMOLOGY / Quartile : Q1, Sujet : AGRONOMY

Résumé : BACKGROUND: Evolution of pyrethroid resistance in the cotton bollworm Helicoverpa armigera (H ¨ ubner) (Lepidoptera: Noctuidae) threatens continued cotton production in Central Africa. Dose-response bioassays were conducted on areawide collection of bollworm populations from major host plants, while biochemical techniques were used to evaluate basic mechanisms underlying resistance. RESULTS: Pyrethroid resistance is primarily associated with detoxification by enhanced esterase activity. High resistance to cypermethrin (RF = 67-1771), cross-resistance to deltamethrin (RF = 60-2972) and lack of cross-resistance to the non-ester pyrethroid etofenprox (RF = 2-10) were observed among H. armigera field populations and laboratory-selected strains. Enzymatic assays showed that esterase activity, but not oxidase content or glutathione-S-transferase activity, was positively correlated with resistance to cypermethrin. Pretreatment with piperonyl butoxide (PBO) resulted in significant synergism with cypermethrin in 6/10 field populations, but not in the laboratory-selected strain, indicating that additional mechanisms such as mixed-function oxidase (MFO) may be involved in field resistance. The absence of cross-resistance to DDT ruled out a possible target-sitemodification. CONCLUSION: Knowledge of the mechanisms involved in pyrethroid resistance and the lack of cross-resistance to spinosad and indoxacarb is a key to devising new resistance management strategies aimed at restoring the efficacy of pyrethroid-based programmes.

Mots-clés Agrovoc : Gossypium, Helicoverpa armigera, pyréthrine, insecticide, estérase, résistance aux pesticides, expérimentation

Mots-clés géographiques Agrovoc : Cameroun, Tchad

Mots-clés complémentaires : Pyréthroïde

Classification Agris : H10 - Ravageurs des plantes

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations