精喹禾灵等药剂除草活性及对甘薯的安全性.pdfVIP

Vol. 51, No. 6 AGROCHEMICALS Jun. 2012 ( 271000) 4 4 29.23 21.70 17.60 8.40 30 d 90% Activity to Weed Control and Safety to Sweetpotato of Quizalofop-P-ethyl ZHANG Yong, LU Xing-tao, LIU Zhen, ZHANG Cheng-ling, ZHANG Tian -tian, MA Chong (Plant Protection Research Institute, Tai’an Academy of Agricultural Sciences, Tai′an 271000, Shandong, China) AAbstract:bstract: [[Aims]Aims] The feasibility was researched of 4 herbicides such as quizalofop-P -ethyl on grass weeds in sweet potato fi elds. [[Methods]Methods] Potted plant and fi eld plot were conduced to evaluate the herbicidal activity of herbicides on Eleusine indica and and safety on sweet potato. [[Results]Results] The selectivity coeffi cient of quizalofop-P -ethyl, haloxyfop- P -methyl, fl uazifop-P -butyl and clethodim, were 29.23, 21.70, 17.60, 8.40 respectively and they all have good safety to sweet potato. The control effect were above 90% of these four herbicides on E. indica , D. sanguinalis on 30th day after treatment. [[Conclusions]Conclusions] The tested herbicides have high control effect on grassy weeds and good safety to sweet potato, which can be applied in fi elds. KKey words:ey words: sweet potato; herbicide; selectivity coeffi cient; effect; safety Echinochloa crus-galli (Linn.) Beauv.] [ 5% ( ) 1