Acta Entomologica Sinica (1997) 40, S30-S34

Kong Ming Wu et al. (1997)
[The influences of gene flow between geographical populations on the evolution of insecticide resistance in Helicoverpa armigera]
Acta Entomologica Sinica 40 (Supp.), S30-S34
Abstract: The resistance levels to phoxim, cyhalothrin and endosulfan of cotton bollworm, Helicoverpa armigera (Hübner), collected from Jianyang of Sichuan Province, Wuxue of Hubei Province, Hengyang of Hunan Province, Nanjing of Jiangsu Province and Hangzhou of Zhejiang Province, were determined as 8.05-38.80, 2.86-290.00 and 5.87-19.83-fold, respectively in comparison with a susceptible cotton bollworm population. The Jianyang population (R) and Hangzhou population (S) were crossed and backcrossed in the laboratory. The results showed that the resistance levels in the F₁ to phoxim, cyhalothrin and endosulfan were 13.16 and 16.69, 10.43 and 19.00, and 12.42 and 10. 21-fold, and the degrees of dominance in heredity of resistance to the three insecticides were estimated to be -0.2220, -0.2147 and 0.0700, respectively. It indicated that phoxim or cyhalothrin resistance was incompletely recessive, and endosulfan resistance was controlled by the semi-recessive gene. The resistance levels of progenies of F₁ breeding to phoxim, cyhalothrin and endosulfan were 17.66, 7.57 and 9.03-fold, respectively, and that in F₁ backcross with the Hangzhou population were 8.79, 3. 00 and 6. 61-fold, respectively. Based on the results mentioned above, it is suggested that the gene flow between the resistant and susceptible populations would significantly reduce the resistance levels to the three insecticides.
(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): Kong Ming Wu

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		China (south)
	Helicoverpa armigera		China (NE)