杀菌剂氟唑菌酰羟胺等对小麦赤霉病防效的比较

Comparison of the Efficacy of Different Fungicides Including the New Type of Fungicide Pydiflumetofen in Controlling Wheat Scab

通过对20%氟唑菌酰羟胺SC、30%丙硫菌唑OD等几种杀菌剂配方及不同生育期施药对小麦赤霉病的防效进行比较,结果表明,30%丙硫菌唑OD 40 mL/667 m^2+43%戊唑醇SC 20 mL/667 m^2和20%氟唑菌酰羟胺SC 40 mL/667 m^2+43%戊唑醇SC 20 mL/667 m^2这2个药剂配方于扬花初期、盛期各施药1次对小麦赤霉病的防效最好,而且小麦色泽金黄,锈病和颖枯都几乎没有发生;其次是40%丙硫·戊唑醇SC 50 mL/667 m^2和20%氟唑菌酰羟胺SC 70 mL/667 m^2这2个药剂配方于扬花初期、盛期各施药1次,防效也很好;但在小麦扬花期间只施药1次的防效均较差。30%丙硫菌唑、20%氟唑菌酰羟胺减量后和43%戊唑醇复配均能提高对赤霉病的防治效果,而且能兼治锈病。

Aiming at identifying more fungicides effective in controlling wheat scab,the present study assessed the control efficacy of some fungicides including pydiflumetofen,a new type of fungicide,against the disease.The results showed that the highest control efficacy against on wheat scab was achieved by the treatment with the mixture of 30%prothioconazole OD at 40 mL/667 m^2 and 43%tebuconazole SC at 20 mL/667 m^2,or the mixture of 20%pydiflumetofen SC at 40 mL/667 m^2 and 43%tebuconazole SC at 20 mL/667 m^2 applied twice,one in the initial stage of flowering period and the other in its peak stage.High control efficacy was also attained by the treatment with 40%prothionyl tebuconazole SC at 50 mL/667 m^2 or 20%pydiflumetofen SC at 70 mL/667 m^2 applied twice,one in the initial stage of flowering period and the other in its peak stage.However,when applied only once either in the initial stage or the peak of the flowering period,these fungicides showed low efficacy in controlling wheat scab.