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Inheritance of resistance to abamectin+pyridaben in Tetranychus truncatus Ehara.
- Source :
- Chinese Journal of Applied Entomology; 2019, Vol. 56 Issue 1, p150-154, 5p
- Publication Year :
- 2019
-
Abstract
- [Objectives] To clarify the inheritance of resistance to avermectin+pyridaben in Tetranychus truncatus Ehara. [Methods] Resistant (RR)and susceptible (SS) strains of Tetranychus truncatus Ehara were crossed and backcrossed to investigate the genes involved in resistance to avermectin+pyridaben, their dominance (D) and cytoplasmic factors involved in resistance. [Results] D values for F<subscript>1</subscript> females from SS♀xRR♂ crosses and SS♀xRR♂ crosses were in the range of 0 < D < 1 (0.625 and 0.802, respectively), indicating incomplete dominance. The 95% confidence limits of these two D values overlap, indicating that there is no significant difference between D<subscript>SR</subscript> and D<subscript>RS</subscript>. This reveals that the gene responsible for resistance is located in the autosome. A Chi-square (χ²) goodness-of-fit analysis indicated that mortality levels in F<subscript>2</subscript> females (BC<subscript>1SR</subscript> and BC<subscript>1RS</subscript>) were significantly different (χ²= 16.92, df = 9, P < 0.05) from the expected values for multiple gene control. [Conclusion] The inheritance of resistance to abamectin+pyridaben in T. truncatus can easily cause a wide spectrum of resistance that is difficult to reduce. Consequently, abamectin+pyridaben should be used in rotation with the other insecticides to reduce selection for resistance to this combination of insecticides. It's important to implement a preventive resistance management strategy and measures to manage resistance to abamectin+pyridaben. [ABSTRACT FROM AUTHOR]
Details
- Language :
- Chinese
- ISSN :
- 20951353
- Volume :
- 56
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Chinese Journal of Applied Entomology
- Publication Type :
- Academic Journal
- Accession number :
- 136898748
- Full Text :
- https://doi.org/10.7679/j.issn.2095-1353.2019.019