Insecticides susceptibility difference in female and male adults of Laodelphax striatellus and Sogatella furcifera
Bioassay of six commonly used insecticides for controlling rice planthopper the male and female adults of Laodelphax striatellus and Sogatella furcifera was measured using rice seedling immersion method,in order to clarify the susceptibility differences to insecticides between female and male adults in these two rice planthoppers.The results showed that the LC50 values of nitenpyram to female adults of L.striatellus and S.furcifera were 2.88-and 3.09-folds higher than those of male adults,respectively,indicating the susceptibility of male adults of L.striatellus andS.furcifera to nitenpyram was higher than that of female adults.Besides,the LC50 value of triflumezopyrim to the female adult of L.striatellus is 1.79-fold than that of male adult.In addition,there was no sex difference in the susceptibility of these two rice planthoppers to other insecticides.Moreover,the female adults of both rice planthoppers have larger body size than that of male adults.The female adult body weight of L.striatellus and S.furcifera was 1.88-and 1.85-folds than that of male adult,respectively.In summary,there are sex differences in the susceptibility of L.striatellus and S.furcifera adult to nitenpyram and triflumezopyrim,but individual size differences are not the only reason for the different susceptibility of male and female insects to insecticides.
NETL
NSTL
万方数据
