摘要
为了明确不同除草剂配方组合防除直播稻田抗药性杂草的情况,于2009—2010年在洞庭湖稻区进行了田间试验。结果表明:处理后45天,二次使用二氯喹啉酸对稗草的株防效和鲜重防效仅分别为53.1%和65.5%,表明该稻区稗草对二氯喹啉酸已产生抗药性。2年的试验结果显示,除草剂配方组合1、2、3对抗药性稗草及其群落具有优良的防效,均在90%以上。通过2年的田间试验研究发现洞庭湖稻区稻田稗草对二氯喹啉酸已产生抗药性,试验中采用的3个除草剂配方组合在不同年份轮换使用,可避免或延缓新的抗药性杂草发生,具有良好的推广应用前景。
The objective of this study was to confirmed control efficacy that the different herbicides combinations were used to control the resistance weed in direct seeding rice fields in the region of Dongting Lake in 2009-2010.The results showed that,Echinohloa crusgalli（L.）.Beauv.（barnyardgrass） were resistant to quinclorac in the area.The control of double use quinclorac only gave the 53.1% of barnyardgrass plant density control and 65.5% of barnyardgrass plant fresh weight control in the experiment of 2010.The three combination herbicides of 1,2,3 in the test gave excellent control effect to resistance barnyardgrass and its population.The control effect was more than 90% to the weed in two years experiments.The three combination herbicides were used with ring application form in different years and to avoid or delay appearing of new resistance weeds.So that,the three combination herbicides should be extension promoting in direct seeding rice area of Dongting Lake.
出处
《中国农学通报》
CSCD
2012年第9期195-199,共5页
Chinese Agricultural Science Bulletin
基金
国家水稻产业技术体系项目"稻田杂草防控技术研究"(CARS-01)
关键词
抗药性杂草
直播水稻
除草剂配方组合
resistance weed
direct seeding rice
combination herbicides
