Abstract
The small brown planthopper (SBPH), Laodelphax striatellus (Fallén), is an economically important pest that affects rice. In this study, we analyzed the sublethal effects of triflumezopyrim on the biological and demographic parameters of SBPHs in the laboratory. Treatment of third-instar SBPHs with the LC30 of triflumezopyrim prolonged the lives of male adults. The F0 individuals exhibited a significant decrease in fecundity (25.8%) after exposure to triflumezopyrim. The fecundity and egg hatchability of the progeny (F1 individuals) were not significantly affected by treatment with the LC30 of triflumezopyrim, but the mean generation time increased significantly. In addition, the intrinsic rate of increase, finite rate of increase, net reproductive rate, and doubling time did not exhibit any significant changes. However, long-term exposure to the LC75 of triflumezopyrim resulted in a significant decrease in the number of males in the SBPH population. The results of this study indicate that triflumezopyrim can be utilized in pest control programs for SBPHs.
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