Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, China.
Department of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, Honolulu, HI, USA.
Pest Manag Sci. 2018 Feb;74(2):448-455. doi: 10.1002/ps.4728. Epub 2017 Nov 2.
Plant protection products (PPPs) are applied in China and many other developing countries with knapsack sprayers at high volumes with coarse spray quality, resulting in a high percentage of pesticide losses. In this study, a new air-assisted electric knapsack sprayer and two conventional knapsack sprayers were evaluated in terms of pesticide deposition, residues and loss into the soil. Artificial targets fixed to the upper side and underside of the leaf surface in six zones (at two depths and three heights) were used to collect the deposition, which were analyzed by liquid chromatography triple-quadrupole mass spectrometry.
The air-assisted electric knapsack sprayer produced more deposition and better penetrability and uniformity than the two traditional spraying methods. In particular, the air-assisted electric knapsack sprayer reduced pesticide losses to the soil by roughly 37% to 75% and deposited 1.18 and 1.24 times more pesticide than the manual air-pressure and battery-powered knapsack sprayers, respectively. The residues of azoxystrobin and tebuconazole in tomato and cucumber were below the maximum residue limits (MRLs).
In general, use of the the air-assisted electric knapsack sprayer in tomato and cucumber crops could improve the effectiveness of PPPs, reduce the risk of contamination and protect food safety. © 2017 Society of Chemical Industry.
植保产品（PPPs）在中国和许多其他发展中国家被大量使用背包喷雾器进行喷洒，喷雾质量粗糙，导致大量农药流失。本研究采用人工固定在叶片上表面和下表面六个区域（两个深度和三个高度）的靶标，评估了一种新型气助电动背包喷雾器和两种传统背包喷雾器在农药沉积、残留和损失到土壤方面的性能。利用液相色谱三重四极杆质谱对沉积量进行了分析。
气助电动背包喷雾器比两种传统喷雾方法产生更多的沉积量，具有更好的穿透性和均匀性。特别是，气助电动背包喷雾器使农药向土壤的损失减少了约 37%至 75%，与手动气压和电池供电的背包喷雾器相比，分别沉积了 1.18 和 1.24 倍的农药。番茄和黄瓜中嘧菌酯和戊唑醇的残留量均低于最大残留限量（MRLs）。
总体而言，在番茄和黄瓜作物中使用气助电动背包喷雾器可以提高植保产品的效果，降低污染风险，保障食品安全。© 2017 化学工业协会。
