多种杀菌剂对蚕豆霜霉病田间防治效果比较

The Comparation Some Bactericide of Control Effect for Broad bean downy mildew

为筛选防治蚕豆霜霉病防治药剂,进行了嘧菌酯、氟啶胺、烯酰吗啉、氰霜唑不同浓度对蚕豆霜霉病的田间防效试验.结果表明,于霜霉病初发生期用药,间隔7d连续用药2次,药后7、14d用10%氰霜唑悬浮剂有效量112.5mL/hm^2的病指防效分别为92.5%、85.49%;50%烯酰吗啉水分散粒剂412.5g的痛指防效分别为77.4%、88.34%.以上2处理的防效明显高于其它各处理的防治效果,能很好的控制蚕豆霜霉病的发生为害.各药剂处理在试验剂量下均未出现药害现象,对蚕豆生长安全.摘取的青食蚕豆最终农药残留量检测均未测出残留.

Some hactericide were screened to control Broad bean downy mildew in the field experi-ment,they were Azoxystrobin,Fluazinam,Dimethomorph and Cyazofamid.The result showed that the control effect of disease index were 92.5%and 85.49%for 10%Cyazofarid SC 112.5ml.a.i/ha,77.4%und 88.34%for 50%Dimethomorph WG 412.5g a.i/ha 7duy und 14 days alier lreu-ted by lwo times spraying buclericide ut the early stuge of Broud bean downy mildew,the two treut ments were significantly higher than others for control effect,and they can control Broad bean downy mildew effectively.The phytotoxicity was not happened of all treatment,so the bacteri-cides of the experiment were safe for plant.Also the pesticide residues of them were not detected and the broad hean were safe for feed.