Sublethal effects of diflovidazin on life table parameters of two-spotted spider miteTetranychus urticae(Acari: Tetranychidae)

Lethal and sublethal effects of fluralaner on the two‐spotted spider mites, Tetranychus urticae Koch (Acari: Tetranychidae)

“…In the current study, the population parameters and offspring of TSSM female adults treated with sublethal concentrations of fluralaner were investigated and to our knowledge, this is the first report of the sublethal effects of fluralaner on mites. Referring to other published data 4,27,28,46 (Table S2) After TSSM eggs were treated with LC 30 of fluralaner, egg duration was increased by 15.50% (Table 3), which was in agreement with report by Wang et al 28 However, the duration, fecundity and longevity of female adults in the LC 30 treatment were significantly decreased by 35.04%, 28.42%, and 13.21%, respectively, compared with the control treatment. Meanwhile, we found that sublethal concentrations of spinetoram (LC 20 ) and bifenthrin (LC 25 ) could reduce the duration of female adults, 4,28 and sublethal concentrations of diflovidazin (LC 20 ) and chlorfenapyr (LC 30 ) could reduce longevity.…”

“…According to the results shown in Table , the net reproduction rate ( R 0 ), intrinsic rate of increase ( r ) and finite rate of increase ( λ ) were decreased significantly in sublethal treatments compared with control, which were in line with previous reports on bifenthrin, chlorfenapyr, diflovidazin and fenazaquin, but completely contrary to spinetoram . Hence, we speculate that a sublethal concentration of fluralaner had virulent effects on offspring and led to a population decrease.…”

“…In the current study, the population parameters and offspring of TSSM female adults treated with sublethal concentrations of fluralaner were investigated and to our knowledge, this is the first report of the sublethal effects of fluralaner on mites. Referring to other published data (Table S2), we found that conventional indices of TSSM eggs and female adults, such as number of eggs per female adult, longevity, fecundity, mean generation time ( T ) were almost the same in the control and susceptible strain. Moreover, fluralaner had a significant adverse effect on TSSM female adults, and could significantly reduce the number of eggs per female adult by 33.45%, and longevity by 22.45%, in a LC 30 treatment compared with control groups (Table ).…”

“…However, the duration, fecundity and longevity of female adults in the LC 30 treatment were significantly decreased by 35.04%, 28.42%, and 13.21%, respectively, compared with the control treatment. Meanwhile, we found that sublethal concentrations of spinetoram (LC 20 ) and bifenthrin (LC 25 ) could reduce the duration of female adults, and sublethal concentrations of diflovidazin (LC 20 ) and chlorfenapyr (LC 30 ) could reduce longevity . By contrast, LC 10 of spinetoram could significantly enhance fecundity by 23.27% …”

“…Bioassays for TSSM 1-day-old eggs and 1-day-old female adults from the laboratory and field were performed using leaf disc dipping, as described previously. [25][26][27] Briefly, fluralaner was dissolved in acetone to a stock solution (10 000 mg L −1 ), which was then diluted to serial concentrations of working solution using a mixture of water and co-solvent 1% (v/v) Tween-80 referring to the pre-experiment. A whole kidney bean leaf was cut into small pieces measuring 2 × 2 cm.…”