PMID- 28898566 OWN - NLM STAT- MEDLINE DCOM- 20180718 LR - 20221207 IS - 1526-4998 (Electronic) IS - 1526-498X (Linking) VI - 74 IP - 2 DP - 2018 Feb TI - Comparison of a new air-assisted sprayer and two conventional sprayers in terms of deposition, loss to the soil and residue of azoxystrobin and tebuconazole applied to sunlit greenhouse tomato and field cucumber. PG - 448-455 LID - 10.1002/ps.4728 [doi] AB - BACKGROUND: 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. RESULTS: 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). CONCLUSION: 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. (c) 2017 Society of Chemical Industry. CI - (c) 2017 Society of Chemical Industry. FAU - Li, Yanjie AU - Li Y AD - Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, China. AD - Department of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, Honolulu, HI, USA. FAU - Li, Yifan AU - Li Y AD - Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, China. FAU - Pan, Xiang AU - Pan X AD - Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, China. FAU - Li, Qing X AU - Li QX AD - Department of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, Honolulu, HI, USA. FAU - Chen, Ronghua AU - Chen R AD - Institute of Pesticide and Environmental Toxicology, Guangxi University, Nanning, China. FAU - Li, Xuesheng AU - Li X AD - Institute of Pesticide and Environmental Toxicology, Guangxi University, Nanning, China. FAU - Pan, Canping AU - Pan C AUID- ORCID: 0000-0002-7616-1615 AD - Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, China. FAU - Song, Jianli AU - Song J AD - Department of Applied Chemistry, College of Science, China Agricultural University, Beijing, China. LA - eng PT - Comparative Study PT - Journal Article DEP - 20171102 PL - England TA - Pest Manag Sci JT - Pest management science JID - 100898744 RN - 0 (Fungicides, Industrial) RN - 0 (Pesticide Residues) RN - 0 (Pyrimidines) RN - 0 (Soil) RN - 0 (Strobilurins) RN - 0 (Triazoles) RN - 401ATW8TRW (tebuconazole) RN - NYH7Y08IPM (azoxystrobin) SB - IM MH - Agriculture/instrumentation/*methods MH - Cucumis sativus/growth & development MH - Fungicides, Industrial/*analysis/chemistry MH - Solanum lycopersicum/growth & development MH - Pesticide Residues/*analysis MH - Pyrimidines/*analysis/chemistry MH - Soil/chemistry MH - Strobilurins/*analysis/chemistry MH - Triazoles/*analysis/chemistry OTO - NOTNLM OT - air assistance OT - deposition OT - pesticide residue OT - sprayer EDAT- 2017/09/13 06:00 MHDA- 2018/07/19 06:00 CRDT- 2017/09/13 06:00 PHST- 2016/11/21 00:00 [received] PHST- 2017/08/21 00:00 [revised] PHST- 2017/09/01 00:00 [accepted] PHST- 2017/09/13 06:00 [pubmed] PHST- 2018/07/19 06:00 [medline] PHST- 2017/09/13 06:00 [entrez] AID - 10.1002/ps.4728 [doi] PST - ppublish SO - Pest Manag Sci. 2018 Feb;74(2):448-455. doi: 10.1002/ps.4728. Epub 2017 Nov 2.