The Mechanism of Methylated Seed Oil on Enhancing Biological Efficacy of Topramezone on Weeds
文献类型： 外文期刊
作者： Zhang, Jinwei 1 ; Jaeck, Ortrud 3 ; Menegat, Alexander 3 ; Zhang, Zongjian 4 ; Gerhards, Roland 3 ; Ni, Hanwen 1 ;
作者机构： 1.China Agr Univ, Coll Agr & Biotechnol, Weed Management Lab, Beijing 100094, Peoples R China
2.Tianjin Acad Agr Sci, Inst Plant Protect, Tianjin, Peoples R China
3.Univ Hohenheim, Dept Weed Sci, Inst Phytomed, Stuttgart, Germany
4.Cent Res Inst China Chem Sci & Technol, Off Natl Pesticide R&D South Ctr, R&D Ctr Funct Addit, Beijing, Peoples R China
期刊名称：PLOS ONE （ 影响因子：3.24； 五年影响因子：3.788 ）
ISSN： 1932-6203
年卷期： 2013 年 8 卷 9 期
页码：
收录情况： SCI
摘要： Methylated seed oil (MSO) is a recommended adjuvant for the newly registered herbicide topramezone in China and also in other countries of the world, but the mechanism of MSO enhancing topramezone efficacy is still not clear. Greenhouse and laboratory experiments were conducted to determine the effects of MSO on efficacy, solution property, droplet spread and evaporation, active ingredient deposition, foliar absorption and translocation of topramezone applied to giant foxtail (Setaria faberi Herrm.) and velvetleaf (Abutilon theophrasti Medic.). Experimental results showed that 0.3% MSO enhanced the efficacy of topramezone by 1.5-fold on giant foxtail and by 1.0-fold on velvetleaf. When this herbicide was mixed with MSO, its solution surface tension and leaf contact angle decreased significantly, its spread areas on weed leaf surfaces increased significantly, its wetting time was shortened on giant foxtail but not changed on velvetleaf, and less of its active ingredient crystal was observed on the treated weed leaf surfaces. MSO increased the absorption of topramezone by 68.9% for giant foxtail and by 45.9% for velvetleaf 24 hours after treatment. It also apparently promoted the translocation of this herbicide in these two weeds.
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