外文摘要：BACKGROUND Suspension concentrate (SC) is one of the most widely used formulations for agricultural plant protection. With the rapid development of unmanned aerial vehicle (UAV) plant protection, the problems of spray drift, droplet rebound and poor wettability in the application of SC from UAVs have attracted wide attention. Although some tank-mix adjuvants have been used to enhance dosage delivery for UAV, their effects and mechanisms are not fully clear, and few formulations are specifically designed for UAV. RESULTS The type and concentration of tank-mix adjuvant affect the dosage delivery of SC. MO501 can significantly reduce DV<100 mu m, and inhibit droplet rebound on peanut leaves at concentrations >= 0.5%. Silwet 408 can achieve complete wetting and superspreading after adding >= 0.2% concentrations, but only >= 0.5% can inhibit rebound. XL-70 shows excellent regulation ability even at low concentration, and 0.2% concentration can simultaneously suppress impact and promote spreading. Besides, the formulation oil dispersion (OD) can significantly reduce the driftable fine fraction and inhibit rebound at dilution ratios of <= 250-fold, thus enhancing dosage delivery. CONCLUSION SC is prone to rebound on hydrophobic leaf surfaces and shows poor wetting and spreading properties. Appropriate types and concentrations of tank-mix adjuvants and formulation improvement are two effective strategies for improving the dosage delivery of pesticides, whereas the addition of inappropriate adjuvants may cause potential risks instead. These findings provide guidance for the rational selection of tank-mix adjuvants and potential applications of OD for UAV plant protection.
外文关键词：unmanned aerial vehicle;peanut (Arachis hypogaea L.);tank-mix adjuvant;oil dispersion;dosage delivery;impact behavior
作者：Guo, Xinyu;Sun, Zhe;Zhao, Rui;Yu, Meng;Liu, Yabo;Ma, Yingjian;Gu, Yu-cheng;Formstone, Carl;Xu, Yong;Wu, Xuemin
作者单位：China Agr Univ;Syngenta Jealotts Hill Int Res Ctr
期刊名称：PEST MANAGEMENT SCIENCE
期刊影响因子：0.0
出版年份：2024
出版刊次：80（3）
原文传递申请：江苏省科技资源（工程技术文献）统筹服务平台