Sublethal effects of abamectin on the development, fecundity, and wing morphs of the brown planthopper Nilaparvata lugens

Yang, Hong; Zhou, Cao; Jin, Dao‐Chao; Gong, Mingfu; Zhao, Wei; Long, Gui‐Yun

doi:10.1016/j.aspen.2019.10.012

Cited by 8 publications

(4 citation statements)

References 44 publications

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“…Thus, insecticide-enhanced reproduction is likely a key factor in the BPH resurgence observed when farmers use EB and abamectin to control leaffolders in rice crops in China (29). Although this is the first report of sublethal doses of avermectins enhancing insect fecundity, our findings are consistent with previous studies which have shown that certain insecticides, herbicides and fungicides stimulate BPH reproduction (3, 7, 14, 63–68). Intriguingly, we show that EB only induces fecundity in female adults and is specific to BPH, with EB exposure failing to enhance reproduction in two related species, the small brown planthopper, L. striatellus and the white backed planthopper, S. furcifera , or the model insect D. melanogaster .…”

Section: Discussionsupporting

confidence: 93%

Pesticide-induced resurgence in brown planthopper is mediated by action on a suite of genes that promote juvenile hormone biosynthesis and female fecundity

Gao,

Su,

Liu

et al. 2023

Preprint

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Pesticide-induced resurgence, increases in pest insect populations following pesticide application, is a serious threat to the sustainable control of many highly damaging crop pests. Resurgence can result from pesticide-enhanced pest reproduction, however, the molecular mechanisms mediating this process remain unresolved. Here we show that brown planthopper (BPH) resurgence following emamectin benzoate (EB) exposure results from the coordinated action of a diverse suite of actors that regulate juvenile hormone (JH) levels, resulting in increased JH titer in adult females and enhanced fecundity. Following reports of BPH resurgence in rice crops when this species is exposed to EB, we demonstrate that EB treatment results in profound changes in female BPH fitness including enhanced ovary development and elevated egg production. This enhanced reproductive fitness results from the EB-mediated upregulation of key genes involved in the regulation of JH, including JHAMT, Met and Kr-h1 and the downregulation of allatostatin (AstA) and allatostatin receptor (AstAR) expression. The remodulation of gene expression following EB exposure is dependent on the action of this insecticide on its molecular target the glutamate-gated chloride channel (GluCl) receptor. Collectively, these results provide mechanistic insights into the regulation of negative pesticide-induced responses in insects and reveal the key actors involved in the JH-signaling pathway that underpin pesticide resurgence.

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Section: Discussionsupporting

confidence: 93%

Pesticide-induced resurgence in brown planthopper is mediated by action on a suite of genes that promote juvenile hormone biosynthesis and female fecundity

Gao,

Su,

Liu

et al. 2023

Preprint

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“…Similarly, LC 50 value of abamectin caused significant reduction in female longevity of Cryptolaemus montrouzieri Mulsant [44]. In contrast, LC 10 and LC 25 of abamectin significantly prolonged the longevity of N. lugens brachypterous [38]. In this study, LC 20 EMB could significantly prolong FAW longevity, but this trend was not observed on exposure to LC 10 EMB.…”

Section: Effect Of Emb On the Performance Of Faw Parental Generationmentioning

confidence: 52%

“…There was a similar pattern for the developmental time and weight of FAW in the present study that LC 20 significantly prolonged the pupal period of FAW male and increased the pupal weight of male but not of female. However, LC 10 and LC 25 abamectin had no significant effect on the nymphal stage duration of Nilaparvata lugens Stål [38].…”

Section: Effect Of Emb On the Performance Of Faw Parental Generationmentioning

confidence: 81%

“…Effects on fecundity after exposure to sublethal concentrations of pesticides were induced more negatively and less positively [18]. In N. lugens, LC 10 and LC 25 abamectin significantly inhibited the fecundity of brachypterous [38]. LC 10 , LC 20 and LC 30 abamectin severely affected the fecundity of predatory mite, Phytoseius plumifer (Canestrini and Fanzago) and Scolothrips longicornis Priesner [39,40].…”

Section: Effect Of Emb On the Performance Of Faw Parental Generationmentioning

confidence: 97%

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Sublethal Effects of Emamectin Benzoate on Fall Armyworm, Spodoptera frugiperda (Lepidoptera: Noctuidae)

Liu

Tan

et al. 2022

Agriculture

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Fall armyworm (FAW), Spodoptera frugiperda (Lepidoptera: Noctuidae), is a highly invasive polyphagous pest that causes great economic losses to agricultural production. Emamectin benzoate (EMB) is one of the most popular biopesticides with high antipest, anti-parasitic and anti-nematode activities and low toxicity. The present study was conducted to determine the lethality of EMB to FAW for 24 h. Sublethal effects of EMB on FAW parental and offspring generations were also assessed. LC10, LC20 and LC50 EMB for 24 h on FAW third instar larvae were 0.0127 mg/L, 0.0589 mg/L, and 0.1062 mg/L, respectively. A low dose of sublethal concentrations of EMB could significantly influence the life cycle of FAW parental and offspring generations. Sublethal concentration (LC20) of EMB significantly prolonged the pupal period of male and increased the pupal weight of male but not of female, and significantly delayed the oviposition period and longevity of adult FAW. In the FAW offspring generation, sublethal concentrations significantly increased the mortality of offspring pupae and pre-adults, and reduced the development time of offspring larvae and pre-adult male and female. Sublethal concentrations (LC10 and LC20) of EMB significantly decreased the FAW oviposition period. However, only LC10 significantly reduced FAW F1 female fecundity. No significant difference was found in the intrinsic rates of natural increase (rm), finite rate of population increase (λ), and net reproductive rate (R0) of FAW offspring exposed to sublethal concentrations. This is the first study to determine the sublethal concentrations of EMB on the life table parameters of two FAW generations. These findings can provide important implications for the rational utilization of FAW insecticides.

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Sublethal effects of spinetoram and emamectin benzoate on key demographic parameters of fall armyworm, Spodoptera frugiperda (Lepidoptera: Noctuidae) under laboratory conditions

Abbas

Zhao

Arshad

et al. 2023

Environ Sci Pollut Res

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Sublethal effects of abamectin on the development, fecundity, and wing morphs of the brown planthopper Nilaparvata lugens

Cited by 8 publications

References 44 publications

Pesticide-induced resurgence in brown planthopper is mediated by action on a suite of genes that promote juvenile hormone biosynthesis and female fecundity

Pesticide-induced resurgence in brown planthopper is mediated by action on a suite of genes that promote juvenile hormone biosynthesis and female fecundity

Sublethal Effects of Emamectin Benzoate on Fall Armyworm, Spodoptera frugiperda (Lepidoptera: Noctuidae)

Sublethal effects of spinetoram and emamectin benzoate on key demographic parameters of fall armyworm, Spodoptera frugiperda (Lepidoptera: Noctuidae) under laboratory conditions

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