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根据比利时(C.Ducattillon)CARAH马铃薯晚疫病预警系统预测结果确定马铃薯晚疫病菌侵染时间进行施药,第一次侵染施用代森锰锌1次,第二、第三、第四次侵染分别使用银法利、抑快净、烯酰吗啉、克露、甲霜灵·锰锌、双炔酰菌胺各3次。结果表明,6种组合使用对马铃薯晚疫病均有较好的防治效果,且随着用药次数的增加防效提高,最后一次药后7 d防效分别为94.89%、87.44%、94.11%、88.22%、81.00%、93.67%,增产幅度达5.63%~24.69%。
According to the predictions of early warning system of potato late blight disease in Belgium (C.Ducattillon), the infecting time of Phytophthora infestans was determined. The first application of mancozeb was 1, the second, the third and the fourth Dye, respectively, the use of silver Farley, fast net, dimethomorph, clenbuterol, metalaxyl, manganese zinc, mandipropamid three times. The results showed that all six combinations had better control effects on late blight of potato, and the control effect was increased with the increase of the number of drugs. The control effects on the 7th day after the last drug were 94.89%, 87.44%, 94.11% and 88.22 %, 81.00%, 93.67%, and the increase rate is 5.63% ~ 24.69%.