Sublethal effects of imidacloprid on the development, reproduction, and susceptibility of the white-backed planthopper, Sogatella furcifera (Hemiptera: Delphacidae)

Effects of Sublethal Concentrations of Insecticides on the Fecundity of Sogatella furcifera (Hemiptera: Delphacidae) via the Regulation of Vitellogenin and Its Receptor

“…Several studies have shown that sublethal concentrations of insecticides can affect insect reproduction. For example, sublethal concentrations of thiamethoxam and imidacloprid significantly inhibited white-backed planthopper reproduction ( Yang et al 2017 , Zhou et al 2017 ), whereas lethal concentrations of triazophos and deltamethrin significantly stimulated white-backed planthopper reproduction ( Liu et al 2016 , Zhou et al 2019b ). However, whether Vg and VgR, as the primary proteins involved in white-backed planthopper reproduction, are also affected by insecticides remains unknown.…”

“…White-backed planthoppers were treated as per a previously reported method ( Zhuang et al 1999 , Zhou et al 2017 ) with slight modifications. First, thiamethoxam and triazophos were dissolved in acetone to prepare stock solutions.…”

“…When applied in the field, in addition to their lethal effects, insecticides produce sublethal effects on the behavior, reproduction, development, and drug resistance of pests due to differential individual exposure of insects to insecticides as well as due to degradation of the applied insecticides ( Desneux et al 2007 ). In our previous studies, we noted that sublethal concentrations of imidacloprid ( Zhou et al 2017 ), thiamethoxam ( Yang et al 2017 ), buprofezin ( Wang et al 2018 ), pymetrozine ( Long et al 2017 ), and cyantraniliprole ( Zhou et al 2016 ) significantly inhibited white-backed planthopper reproduction, whereas sublethal concentrations of triazophos ( Liu et al 2016 ) and deltamethrin ( Zhou et al 2019b ) stimulated white-backed planthopper reproduction. However, these studies were limited to the macro level, and molecular mechanisms underlying the effects of insecticides on white-backed planthopper reproduction have not been explored.…”

Sublethal effects of buprofezin on development and reproduction in the white-backed planthopper, Sogatella furcifera (Hemiptera: Delphacidae)

“…Our results are in line to Zhou et al . 25 reported that sublethal concentrations of imidacloprid showed significant effects on the fecundity of S. furcifera .…”

“…For instance, organophosphorus, pyrethroid, and organochlorine pesticides have been revealed to cause the resurgence of pests when insecticide contaminants degraded to near a low lethal level 23 , 24 . Some reports have found that sublethal concentrations of insecticides affect growth and increased the productivity and developmental duration in insect, for S. furcifera , the population growth was inhibited by sublethal concentration of triazophos, chlorantraniliprole and imidacloprid 25 , 26 . In various investigations, increased fecundity and survival time were also observed in M. persicae after treatment with sublethal concentrations of azadirachtin, imidacloprid 27 .…”