咪鲜胺·戊唑醇及其复配剂对小麦赤霉病的防治效果

Control Effect of Prochloraz,Pebuconazole and Their Mixture on Wheat Scab(Fusarium graminearum)

[目的]筛选防治赤霉病的有效药剂。[方法]采用室内配方筛选试验和田间药剂防治试验研究咪鲜胺、戊唑醇及二者混配对对小麦赤霉病的防治效果。[结果]咪鲜胺、戊唑醇及咪鲜胺与戊唑醇复配可抑制赤霉病菌菌丝的生长,且咪鲜胺与戊唑醇复配无拮抗作用,按试验配比复配时,以咪鲜胺+戊唑醇(2∶1)的增效作用最好,增效系数为1.58。在供试的几种药剂中,咪鲜胺+戊唑醇(2∶1)复配剂对小麦赤霉病的田间防效较好,其病穗防效和病指防效分别为78.21%和86.72%,显著高于其他5种药剂。[结论]试验结果为生产中小麦赤霉病的药剂防治提供了参考。

[Objective] The aim was to screen out effective pesticides to control wheat scab.[Method] We studied control effect of prochloraz,pebuconazole and their mixture on wheat scab（Fusarium graminearum） by indoor formulation screening test and field control test.[Result]The prochloraz,tebuconazole and mixtures of them both could inhibit the mycelium＇s growth of Fusarium graminearum and mixtures had no antagonism.When prochloraz was mixed with tebuconazole as 2∶ 1,it had the best additive effects（SR = 1.58）.The mixtures also showed excellent effect which was 78.21% and 86.72% to Fusarium in the field,higher than the other 5 pesticides significantly.[Conclusion] The result provided reference for chemical control of wheat scab.