Synergistic effect of imidacloprid combined with synergistic agents (Beichuang, Jiexiaoli) onMyzus persicae(Hemiptera: Aphididae)

Abstract

Myzus persicae is a well known aphid pest, which can transport plant viruses to plants of the nightshade/potato family, namely the Solanaceae, and other food crops. Our aim was to explore the effects of imidacloprid combined with synergistic agents (Beichuang and Jiexiaoli) on Myzus persicae. Different concentrations of imidacloprid combined with synergistic agents were used to treat M. persicae. Biological activity of M. persicae was analyzed under indoor conditions, and the control efficiency of the admixture was determined through field experiments. The penetration rate of the admixture on tobacco leaf and M. persicae was analyzed, and the liquid surface tension and contact angle was measured. Imidacloprid combined with Beichuang and Jiexiaoli showed significant synergistic effects with high control efficacy. Beichuang and Jiexiaoli significantly improved the penetration of imidacloprid into the cuticle of tobacco leaves and the insect body wall. The surface tension and contact angles were abated by synergists. The combination of imidacloprid with Beichuang and Jiexiaoli showed a significant synergistic effect, which can be used for decreasing the dosage of imidacloprid and improving its long-term control efficacy.

Combined Activity of Saponin B Isolated from Dodonaea viscosa Seeds with Pesticide Azadirachtin against the Pest Spodoptera litura

“…With insecticide-resistant pest populations becoming an ever-growing concern, the development of novel synergists is needed. For example, Haitao Chen reports that Beichuang substances and Jiexiaoli substances have synergistic activity with a number of bacteria and that Beichuang substances and Jiexiaoli substances exert synergistic activities by affecting the contact angle and surface tension [ 11 ]. Gaofeng Cui reported that curcumin has synergistic activity with avermectin through the enhancement of programmed cell death [ 9 ].…”

Effects of a multi‐functional adjuvant on efficacy of methoxyfenozide (SC24%) and spinosad (SC24%) to control the European grapevine moth, Lobesia botrana

“…Numerous field experiments have reported that insecticide efficacy can be increased substantially when adjuvants are added (Aioub et al, 2015; Chen et al, 2014; Demkovich et al, 2018). In viticulture, the use of adjuvants is regarded as a major mechanism for improving the efficacy of biological control agents (BCA) used against grape diseases to increase cell adherence to berry and leaf surfaces, leading to BCA establishment (Calvo‐Garrido et al, 2018).…”