摘要
为筛选防除青海省农田恶性杂草的高效除草剂,采用茎叶喷雾法室内测定了30%氨氯·二氯·氯氨吡啶酸可溶液剂(SL)对密花香薷、藜、苣荬菜、地肤、野芥菜的除草活性。结果表明:30%氨氯·二氯·氯氨吡啶酸SL施药后7 d对供试的5种杂草株高均有不同程度的抑制,施药后14 d对杂草的抑制作用比施药后7 d明显增强。施药后21 d 30%氨氯·二氯·氯氨吡啶酸SL 45.0、67.5、90.0、112.5、135.0 g a.i/hm2处理对密花香薷的鲜重防效分别为71.85%、75.87%、82.80%、89.81%、90.42%;对藜的鲜重防效分别为87.25%、100.00%、100.00%、100.00%、100.00%;对苣荬菜的鲜重防效分别为71.95%、72.14%、80.39%、85.84%、89.26%;对地肤的鲜重防效分别为68.48%、75.30%、78.33%、80.00%、85.76%;对野芥菜的鲜重防效分别为48.76%、66.56%、72.47%、78.22%、84.71%。30%氨氯·二氯·氯氨吡啶酸SL对密花香薷、藜、苣荬菜、地肤、野芥菜的ED90分别为130.27、33.36、161.38、241.20、185.49 g a.i/hm2。说明30%氨氯·二氯·氯氨吡啶酸SL能够扩大杀草谱,有效防除青海省农田中的阔叶杂草,本研究结果可为青海省农田阔叶杂草防除提供参考数据。
In order to screen out effective herbicides to control malignant weeds in the farmland of Qinghai provine,Foliar spraying method is employed to determine the herbicidal activity of 30%Picloram Clopyralid Aminopyralid SL to Elsholtzia densa Benth,Chenopodium album L.Sonchus wightianus DC.Kochia scoparia(L.)Schrad.and wild Brassica juncea.The results show that the plant height of the five tested weeds is inhibited in varying degrees after applying 30%Picloram Clopyralid Aminopyralid SL for 7 days,and the inhibition on weeds is significantly enhanced after application for 14 days compared with 7 days.After 21 days of application,the fresh weight control effects of 30%Picloram Clopyralid Aminopyralid SL 450,675,900,1125,1350 g ai/hm2 on Elsholtzia densa Benth.are 7185%,7587%,8280%,8981%and 9042%respectively;the fresh weight control effects on Chenopodium album L.are 8725%,10000%,10000%,10000%and 10000%respectively;the fresh weight control effects on Sonchus wightianus DC.are 7195%,7214%,8039%,8584%and 8926%respectively;the fresh weight control effects on ochia scoparia(Linn)schrad.are 6848%,7530%,7833%,8000%and 8576%respectively;the fresh weight control effects fresh weight control effects on wild Brassica juncea.are 4876%,6656%,7247%,7822%and 8471%respectively.The ED90 values of 30%Picloram Clopyralid Aminopyralid SL on Elsholtzia densa Benth,Chenopodium album L.,Sonchus wightianus DC,Kochia scoparia(L)Schrad.and wild Brassica juncea are 13027,3336,16138,24120,18549 g ai/hm2 respectively.It indicates that 30%Picloram Clopyralid Aminopyralid SL can expand the spectrum of weed killing and effectively control broadleaf weeds in the farmland.The results can provide reference data for the control of broadleaf weeds in the farmland of Qinghai.
作者
施生姣
郭良芝
程亮
李秋荣
魏有海
SHI Shengjiao;GUO Liangzhi;CHENG Liang;LI Qiurong;WEI Youhai(Academy of Agriculture and Forestry Sciences,Qinghai University,Xining 810016,China;Key Laboratory of Agricultural Integrated Pest Management of Qinghai,Xining 810016,China;Scientific Observing and Experimental Station of Crop Pest of Xining,Ministry of Agriculture and Rural Affairs,Xining 810016,China)
出处
《青海大学学报》
2023年第2期49-55,共7页
Journal of Qinghai University
基金
农业农村部现代农业产业技术体系项目(CARS-07-C-3,CARS-08-C-3)
科学技术部第二次青藏高原综合科学考察研究项目(2019QZKK0303)
青海省农业有害生物综合治理重点实验室项目(2022-ZJ-Y10)。
关键词
30%氨氯·二氯·氯氨吡啶酸SL
除草活性
株高抑制率
株防效
鲜重防效
阔叶杂草
30%Picloram Clopyralid Aminopyralid SL
herbicidal activity
inhibition rate of plant height
plant control effect
fresh weight control effect
broadleaved weeds