Natural UV protectants and humectants to improve the efficiency of Steinernema carpocapsae in controlling foliar pests

文献类型： 外文期刊

第一作者： Ha, Bingjun

作者： Ha, Bingjun;Wei, Xianqin;Lu, Peiyu;Qing, Hui;Guo, Jinxuan;Chen, Lei;Ruan, Weibin;Zhang, Renjia;Li, Xingyue;Hu, Bin;Wang, Shuaiyu;Xu, Yang;Fu, Zhen;Shapiro-Ilan, David

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关键词： foliar application; formulation; ultraviolet radiation; leaf herbivore; Steinernema carpocapsae; biological control

期刊名称：PEST MANAGEMENT SCIENCE （ 影响因子：3.8； 五年影响因子：4.3 ）

ISSN： 1526-498X

年卷期： 2025 年 81 卷 3 期

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收录情况： SCI

摘要： BACKGROUNDEntomopathogenic nematodes (EPNs) are recognized as effective biocontrol agents against various soil-dwelling pests. However, their efficacy in managing leaf pests is often constrained by factors such as ultraviolet (UV) radiation and desiccation.RESULTSWe evaluated the protective effects of five plant-derived substances, including grape seed extract, sodium copper chlorophyllin, vitamin C, beta-carotene and lutein, on Steinernema carpocapsae upon exposure to three wavelengths of artificial ultraviolet radiation (UVA, UVB, UVC). The five protectants showed efficient protective effects. Notably, grape seed extract, sodium copper chlorophyllin and vitamin C exhibited significant protective effects on infective juveniles (IJs) even after exposure to UVC for 4, 8 and 12 h. Under natural sunlight conditions, we combined these UV protectants with three humectants and evaluated their effects on IJ viability. Orthogonal experiments revealed that the combination treatment of 0.2% grape seed extract and 0.1% fire blocking gel yielded the highest IJ survival rate. This foliar formulation was tested in the field, leading to significantly higher mortality of Tuta absoluta compared with EPNs only.CONCLUSIONOur findings suggest that the formulation containing UV protectants and humectants effectively overcome the limitations encountered in the foliar application of EPNs, thereby enhancing their potential for pest management in agricultural contexts. (c) 2024 Society of Chemical Industry.

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