Acta Entomologica Sinica (1997) 40, 23-31

Kaiyun Wang, Liyi Mu, Feng Liu, Meiqin Yi and Wei Mu (1997)
[Selection of resistance of cotton bollworm to fenvalerate and other insecticides and its biochemical mechanism]
Acta Entomologica Sinica 40 (1), 23-31
Abstract: Collected from cotton fields with low level application of insecticide and reared with artificial diet at constant temperature, the larvae of cotton bollworm (Helicoverpa armigera Hubner) were separately treated with fenvalerate and four other insecticides by topical application in the laboratory. Results showed that the resistance of the larvae has respectively reached 311.0-fold (F₁₅) to fenvalerate, 10. 8-fold (F₁₂) to methomyl, 3. 5-fold (F₁₄) to parathion-methyl, 5.2-fold (F₁₃) to phoxim, and 4.8-fold (F₁₂) to mixture of parathion-methyl and phoxim. The R-fenvalerate strains have distinct cross-resistance to deltamethrin (41.8 fold) and cyhalothrin (28.1 fold). The results of enzymic inhibitor and activity respectively determined with methods of bioassay and biochemistry distinctly showed that the rise of resistance to fenvalerate was mainly associated with the increasing activities of two kinds of esteraes (mixed-function oxidases and carboxylesterase) in the larvae of cotton bollworm.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Chinese)

Research topic(s) for pests/diseases/weeds:
pesticide resistance of pest

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Helicoverpa armigera	Cotton (Gossypium)	China (NE)