Acta Entomologica Sinica (1997) 40, S43-S48

Weijia Tan, Gemai Liang and Yuyuan Guo (1997)
[Study on the mechanisms of responses to deltamethrin in susceptible and resistant strains of cotton bollworm]
Acta Entomologica Sinica 40 (Supp.), S43-S48
Abstract: The responses to deltamethrin and the changes of the detoxification enzymes were compared by bioassay and biochemical method between the susceptible and resistant strains of cotton bollworm Helicoverpa armigera. The results showed that the levels of resistance to deltamethrin were significantly high in the resistant cotton bollworm either from the field or laboratory selection, and the ratios were 195.8 and 37375-fold compared with the susceptible one, respectively. The hydrolase and mixed function oxidase might be the important enzymes to cause the high resistance of cotton bollworm to deltamethrin. The tests of inhibition by special inhibitors in vivo and in vitro indicated that there were high levels of acetylcholinesterase in the susceptible and resistant strains. However, the affinity to the inhibitors between the two strains was significantly different, suggesting that acetylcholinesterase in the susceptible and resistant strains was changed differently. Consequently, the variation of acetylcholinesterase might also be an important factor affecting the resistance of insecticides even if it is a nerve toxin to central nervous system such as deltamethrin.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Chinese)
Database assignments for author(s): Yu Yuan Guo

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