摘要
为了明确嘧菌酯与戊唑醇组合对黄瓜白粉病的防治效果,开展了嘧菌酯、戊唑醇及其组合对黄瓜白粉病的室内毒力测定。结果表明,嘧菌酯、戊唑醇对黄瓜白粉病菌的EC_(50)值分别为3.3832μg·mL^(-1)和0.9957μg·mL^(-1);嘧菌酯与戊唑醇(质量比1∶2)对黄瓜白粉病菌的EC_(50)值为1.0698μg·mL^(-1),表现为相加作用。田间药效试验结果显示,嘧菌酯和戊唑醇单剂在150 g a.i.·hm^(-2)剂量下对黄瓜白粉病的防效分别为72.67%和74.88%。嘧菌酯与戊唑醇(1∶2)组合在67.5、112.5、157.5 g a.i.·hm^(-2)剂量下对黄瓜白粉病的防效分别为70.99%、80.85%、83.82%,防效与剂量呈正相关。与单剂相比,嘧菌酯与戊唑醇组合对黄瓜白粉病的田间防效显著提高,且用药量显著降低。建议田间按照嘧菌酯与戊唑醇(质量比1∶2),推荐使用剂量为157.5 g a.i.·hm^(-2),科学用药,降低抗药性发生及作物安全性风险。
The lab and field tests were conducted to evaluate the efficacy of the mixtures of azoxystrobin and tebuconazole on control cucumber powdery mildew.The results showed that the EC_(50) values of azoxystrobin and tebuconazole against Sphaerotheca fuligenea were 3.3832μg·mL^(-1) and 0.9957μg·mL^(-1),respectively.The EC_(50) of azoxystrobin and tebuconazole(1∶2)against cucumber powdery mildew was 1.0698μg·mL^(-1),which showed additive effect.Field test results showed that the control efficacy of azoxystrobin and tebuconazole could reach 72.67%and 74.88%at 150 g a.i.·hm^(-2),respectively.The control efficacy of pyrimethanil and tebutanol(1∶2)on powdery mildew were 70.99%,80.85%and 83.82%at the dosage of 67.5,112.5 and 157.5 g a.i.·hm^(-2),respectively.The control efficacy was positively correlated with the dosage.Compared with single fungicide,the mixtures of azoxystrobin and tebuconazole significantly increased the field control efficiency on cucumber powdery mildew,and the dosage was significantly reduced.Although the mixtures of azoxystrobin and tebuconazole showed good control effect on cucumber powdery mildew,the mixtures had safety risk under the condition of high dose.It was suggested to use the mixtures at the recommended dose to reduce the occurrence of fungicide tolerance and crop safety risk.
作者
海飞
袁水霞
刘圣明
HAI Fei;YUAN Shuixia;LIU Shengming(College of Agricultural Engineering,Henan Vocational College of Agriculture,Zhengzhou 451450,Henan,China;College of Horticulture and Plant Protection,Henan University of Science and Technology,Luoyang 471003,Henan,China)
出处
《中国瓜菜》
CAS
北大核心
2022年第6期86-91,共6页
China Cucurbits And Vegetables
基金
河南农业职业学院农业有害生物绿色防控科研创新团队(HNACKT-2020-02)
2019年度中牟县科技攻关项目。
关键词
黄瓜白粉病
嘧菌酯
戊唑醇
防治效果
安全性评价
Cucumber powdery mildew
Azoxystrobin
Tebuconazole
Control efficacy
Safety evaluation
作者简介
海飞,男,副教授,研究方向为作物病虫害绿色防控。E-mail:zbhf007888@163.com;通信作者:刘圣明,男,教授,研究方向为植物病害化学防治。E-mail:liushengmingzb@163.com。
