不同杀菌剂对燕麦叶斑病菌的毒力和田间防效

Toxicity and Control Effects of Fungicides in Oat Leaf Spot by Drechslera avenae

选用7种药剂进行室内毒力和田间防效试验,筛选防治燕麦叶斑病的有效药剂。50%速克灵和58%甲霜锰锌对燕麦叶斑病菌的抑制作用最好,EC_(50)分别为0.404、0.712μg/mL。15%三唑酮、50%多菌灵、40%福美·拌种灵拌种防效高,分别为66.55%、60.20%和57.52%,增产率分别为49.53%、28.29%和31.83%;叶面喷施效果最好的是50%多菌灵,防效为57.52%,增产42.15%。用15%三唑酮、40%福美·拌种灵和50%多菌灵拌种,叶面喷施50%多菌灵可防治燕麦叶斑病。

This study aimed to identify effective fungicides for controlling oat leaf spot caused by Drechslera avenae.Toxicity and field control experiments were conducted on 7 chemical fungicides.The results showed that 50%procymidone and 58%metalaxyl mancozeb had the obviously inhibition on Drechslera avenae,with EC_(50)of 0.404μg/mL and 0.712μg/mL,respectively.The control effects of 15%triadimefon,50%carbendazim and 40%thiram amicarthiazol were 66.55%,60.20%and 57.52%,respectively,the yield increase rates were 49.53%,28.29%and 31.83%.The best spraying effect was 50%carbendazim,the control effect was 57.52%,the yield increased 42.15%.15%triazolidone,40%thiram amicarthiazol and 50%carbendazim were mixed seed,and the foliar spraying was done using50%carbendazim,effective control against oat leaf spot was observed.