Application of ultra-low-volume spray for the control of vegetable disease in greenhouse: Investigation of formulation performance and potential dermal exposure

文献类型： 外文期刊

第一作者： Ma, Jiayi

作者： Ma, Jiayi;Xiang, Sheng;Shi, Yanxia;Xie, Xuewen;Chai, Ali;Li, Lei;Li, Baoju;Fan, Tengfei;Li, Baoju;Fan, Tengfei

作者机构：

关键词： fluazinam; ultra-low-volume spray; pesticide spray characteristics; deposition properties; dermal exposure

期刊名称：PEST MANAGEMENT SCIENCE （ 影响因子：4.1； 五年影响因子：4.4 ）

ISSN： 1526-498X

年卷期： 2024 年 80 卷 6 期

页码：

收录情况： SCI

摘要： BACKGROUND: The use of pesticides in greenhouse vegetable cultivation is necessary and significant. However, traditional pesticide application methods such as the use of backpack sprayers with water-diluted pesticides have certain drawbacks, e.g., uneven distribution, high labor intensity, and safety risks. RESULTS: In this work, fluazinam ultra-low-volume liquids (Flu-ULVs) were prepared using oily solvents as carriers. The effects of different oils on the physical properties of the preparations were investigated. The Flu-ULV can be sprayed directly using a hand-held ultra-low-volume (ULV) sprayer without dilution with water. Compared with commercial water-based suspension concentrates of fluazinam, the Flu-ULV samples showed better wetting of tomato leaves, better atomization, and more uniform droplet distribution. At a dosage of 300 mL/ha, the coverage rate of tomato leaves ranged from 32.47% to 79.3%, with a droplet deposition density of 556 to 2017 droplets/cm(2). Application of Flu-ULVs provided 70.86% control efficacy against gray mold in tomatoes, which was higher than those achieved with reference products. Dermal exposure to Flu-ULVs was also evaluated in greenhouse experiments. The coverage rates for all parts of the operator's body ranged from 0.02% to 0.07%, with deposition volumes of 2.23 to 12.26 mu g/cm(2). CONCLUSION: Ground ULV spraying of fluazinam was proved to be an effective and safe management option for the control of tomato gray mold in greenhouses. This study laid a foundation for the use of ultra-low volume spray to control vegetable diseases in greenhouse, especially those induced by high humidity environment. (c) 2024 Society of Chemical Industry.

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