Insecticide resistance and its management in the diamondback moth: preserving the field efficacy of Bacillus thuringienesis in Fiji.

Authors

Michael J Furlong, Nitesh Nand, Fereti Atumurirava, Mani Mua

Published in

Current opinion in insect science. Pages 101643. Oct 29, 2026. Epub Oct 29, 2026.

Abstract

Diamondback moth is a major global pest that is resistant to >100 different insecticides. Resistance is usually either incompletely recessive or incompletely dominant, and inheritance of recessive traits is almost exclusively monogenic, likely contributing to their rapid expression following selection. Key resistance mechanisms are metabolic enzymes (which can confer cross-resistance between insecticides with different modes-of-action) and target site mutations. Field resistance to deltamethrin, chlorantraniliprole and indoxacarb was detected in Fiji in 2013. In 2014 a new Bacillus thuringiensis (Bt) product was incorporated into an insecticide resistance management (IRM) strategy designed to preserve its efficacy. Field resistance declined rapidly and susceptibility to all products remained high until 2018, when resistance to abamectin and chlorantraniliprole emerged. A revised IRM strategy that included previously unavailable selective insecticides resulted in declines in resistance and populations remained highly susceptible to Bt a decade after its introduction. Effective farmer and industry engagement were critical for success.

PMID:
42956969
Bibliographic data and abstract were imported from PubMed on 30 Oct 2026.

Read full publication at:
Please sign in to see all details.

Stats

1-terrible, 9-excellent. How would you rate this publication? Sign in in to submit your rating.

Post a comment

You need to be signed in to post comments. You can sign in here.

Comments

There are no comments yet.