Unraveling the feeding response and intergenerational sublethal effects of flonicamid on Rhopalosiphum padi

文献类型： 外文期刊

第一作者： Gul, Hina

作者： Gul, Hina;Liu, Xiaoxia;Gul, Hina;ul Haq, Ihsan;Khan, Shanza;Yaseen, Aqsa;Gul, Hina;Ullah, Farman;Guncan, Ali;Abbas, Arzlan;Desneux, Nicolas

作者机构：

关键词： Insecticide toxicity; electropenetrography; biological traits; demographic parameters; chemical application; life table

期刊名称：ENTOMOLOGIA GENERALIS （ 影响因子：4.6； 五年影响因子：4.4 ）

ISSN： 0171-8177

年卷期： 2024 年 44 卷 5 期

页码：

收录情况： SCI

摘要： Flonicamid is a systemic insecticide effective against sap-sucking insect pests, including wheat aphid, Rhopalosiphum padi. However, no research has been conducted on the effects of sublethal concentrations of flonicamid on key demographic parameters and feeding behavior of R. padi. In this study, we examined the sublethal effects of flonicamid on the biological characteristics along with the feeding behavior of R. padi using age-stage, two-sex life table approach, and electrical penetration graphs (EPGs). The toxicity bioassays showed that flonicamid exhibited high toxicity against R. padi adults after 48 h treatment. The adult longevity, fecundity, and reproductive days of the F-0 generation were significantly reduced following R. padi exposure to the LC5 and LC10 of flonicamid. Intergenerational sublethal effects of flonicamid were observed on the developmental stages of the progeny generation (F-1) such as increased pre-adult stages and decreased longevities. The reproduction and life table parameters, including fecundity, R-0, r, lambda, and reproductive days (RPd) were significantly decreased in F-1 generation at both sublethal concentrations of flonicamid as compared to control. Moreover, the EPG data showed that the total duration of phloem sap ingestion and concurrent salivation (E2) were significantly decreased in F-0 at both LC5 and LC10, while in F-1 generation, the E-2 was substantially reduced only at LC10 of flonicamid compared to control. Together, our findings demonstrated that sublethal concentrations of flonicamid negatively affect the demographic parameters and feeding behavior, which consequently inhibit the population growth of R. padi. These sublethal effects are an added benefit to the present mortality effects, which might be crucial in controlling this key pest.

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