Effect of Vegetation and Soil on Oviposition of Locusta migratoria tibetensis Chen
[Objective] The objective of this study is to explore the effect of vegetation and soil physical and chemical properties on fecundity and oviposition distribution of Locusta migratoria tibetensis Chen. [Method] Three-factor quadratic regression general rotary combination experimental design was used to construct oviposition preference model of L. Migratoria tibetensis by using the caging simulation method in laboratory and field. [Result] L. Migratoria tibetensis had oviposition preference on different land soils, and had the highest fecundity in the grassland and barley field (36.03% and 21.20%, respectively). The soil physical and chemical properties had significant effects on oviposition preference. The salt content, water content and pH value had a great effect on oviposition preference. Single factor analysis showed that the fecundity decreased rapidly as the salt content increased in salt content intervals, but the water content and pH value had the optimum value. Double factor analysis showed that the salt content, water content and pH value had interactive effects, and the effect of salt content was the highest. The optimum oviposition soil integrated indictors were found with salt content 0.08%-0.12%, water content 2.91%-3.75% and pH value 7.35-7.65. [Conclusion] L. Migratoria tibetensis had a significant difference in fecundity on different vegetations. The salt content, water content and pH value in soil had obvious effects on the oviposition preference of L. Migratoria tibetensi.
国家科技期刊平台
NSTL
万方数据
维普
