Functional role of in the detoxification of spinetoram and development of .

Bull Entomol Res

Xinjiang Key Laboratory of Biological Resources and Genetic Engineering, College of Life Science and Technology, Xinjiang University, Urumqi, China.

Published: August 2025


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Article Abstract

has evolved resistance to many biological insecticides, resulting in significant annual agricultural and economic losses. Glutathione -transferases (GSTs) are one of the major insect detoxification enzyme systems. However, the detoxification metabolism of GSTs in against biological insecticides remains poorly understood. In this study, We identified five key genes (, and ) by screening from the comparative transcriptomes of two regional populations of in Xinjiang, China. Among the five GSTs, exhibited a significantly high expression level during the larval stage of following exposure to the LC dose of spinetoram. This gene was subsequently cloned, and its expression was knocked down using RNA interference to further analyse its role in the detoxification of spinetoram, as well as in the growth and development of . The results showed that contains a typical gene domain and was highly conserved within the Lepidoptera clade. Silencing of the gene led to a significant increase in the susceptibility of to spinetoram, as evidenced by an extension in the duration of leaf-mining and in the development time from the 2 to the 4 instar larval stage, which were 35.7% and 19.6% longer, respectively, than those of ddHO and ds controls. Furthermore, the mortality rate of larvae treated with ds reached 57.3% by the 7th day. These findings indicate that plays a crucial role in the detoxification of spinetoram and in the growth and development of larvae.

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http://dx.doi.org/10.1017/S0007485325100321DOI Listing

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