不同品种脱毒马铃薯晚疫病防治适期试验

试验选取会-2、威芋3号、费乌瑞它、米拉4个感病马铃薯品种脱毒薯苗于不同时期喷药处理,调查盛花期和终花期晚疫病的防治效果,比较不同品种马铃薯的产量,观察马铃薯植株的药害情况.试验结果表明,现蕾始期、始花期、盛花期各施药一次处理(F处理)防治马铃薯晚疫病的效果极显著优于其他处理;F处理4个品种马铃薯的产量都极显著高于其他处理;施药未对马铃薯植株产生药害.

Research on Optimum Control Period of Late Blight among Different Virus-free Potato Cultivars

The virus-free plants of potato cultivars Hui-2,Weiyu No.3,Favorita and Mira were treated by formula pesticide at different periods.And we analyzed the control effects of late blight at full-bloom stage and final flowering stage, and compared the yields of different potato cultivars and observed the phytotoxicity situation of the potato plants.The results showed that treatment F had significantly better control effect against potato late blight than the other treatments at full-bloom period and final flowering period,which was applying the pesticide once at early squaring period,early flowering period and full-bloom period respectively.The potato yield of treatment F was significantly higher than those of the other treatments.And there was no phytotoxicity observed on potato plants after spraying the formulapesticide.