陇西县甘草褐斑病的发生动态及防效试验  

Dynamic Survey and Control of Cercospora astragalis in Longxi County

作　　者：周天旺[1] 李建军[1] 张新瑞[2] 马永强[1] 李继平[1] 

机构地区：[1]甘肃省农业科学院植物保护研究所,甘肃兰州730070 [2]甘肃省农业科学院,甘肃兰州730070

出　　处：《甘肃农业科技》2013年第7期14-16,共3页Gansu Agricultural Science and Technology

基　　金：甘肃省中药材产业科技攻关项目"当归麻口病综合防控技术研究与示范"(GYC11-05)部分内容;甘肃省农业科学院创新专项(2010GAAS14)部分内容

摘　　要：在陇西县首阳镇进行了甘草褐斑病发生动态调查及药剂防治试验。结果表明,甘草褐斑病6月中旬开始发生,至8月上旬株发病率达100%,同时病害进入快速蔓延期;8月中旬病斑逐渐连片并开始大量脱落,病情指数快速增加,至9月上旬大部分田地50%植株叶片全部脱落。供试的6种杀菌剂对甘草褐斑病都具有一定的防治效果,第1次施药后7 d,以20%丙环唑微乳剂2 000倍液和5%烯唑醇微乳剂1 000倍液防效较好,分别为65.82%、64.41%;第2次施药后14 d,10%苯醚甲环唑微乳剂1 500倍液和20%丙环唑微乳油2 000倍液防效较好,分别为90.73%和85.34%。The dynamic survey and chemical control of Cercospora astragalis were investigated in Longxi county.The dynamic survey results showed that Cercospora astragalis was happen in mid-june,early August incidence of disease to reached 100%,the disease into rapid spread at the same time,the scab shall gradually in mid August and start to fall off,disease index increase quickly,through early September,leaves in nearly 50% of all fall off.The control test results that 6 fungicide effected control Cercospora astragalis.The 7 days after first drug delivery,20% propiconazole 1∶2 000 and 5% diniconazole 1 ∶1 000 control effect reached 65.82%、64.41% respectively.The 14 days after second drug delivery,10% of difenoconazole 1∶1 500 and 20% propiconazole 1∶2 000 control effect reached 90.73% and 85.34% respectively.

关 键 词：甘草褐斑病 发病动态 病情指数 防效 陇西县 

分 类 号：R283.66[医药卫生—中药学]