7个杀菌剂或药剂组合处理对马铃薯晚疫病的田间防效

Seven fungicides or their combinations treatments' field control effect on of potato's late blight

为筛选防治和保产效果好的药剂用于指导面上马铃薯晚疫病的防治,对18.7%烯酰吡唑酯WG、42.4%唑醚氟菌胺SE、52.5%恶酮·霜脲氰WG、68%精甲霜灵·代森锰锌WG、25%双炔酰菌胺SC、25%双炔酰菌胺SC+68%精甲霜灵·代森锰锌WG、68.75%氟菌·霜霉威SC和50%多菌灵WP等8个药剂或药剂组合进行了田间马铃薯晚疫病防治试验。结果表明:除50%多菌灵WP之外,其他7个药剂或药剂组合处理连续喷施5次,对马铃薯晚疫病都具有显著的防治效果和增产效果,防效均达93%以上,增产率为18.15%-31.10%,新增纯收入在911.0-1475.0元/667 m2范围内。根据药剂的防效和增产效果,冬种马铃薯晚疫病防治的参考药剂或药剂组合,首先是5%双炔酰菌胺SC+68%精甲霜灵·代森锰锌WG、42.4%唑醚氟菌胺SE,其次是68.75%氟菌·霜霉威SC、25%双炔酰菌胺SC、18.7%烯酰吡唑酯WG、68%精甲霜灵·代森锰锌WG、52.5%恶酮·霜脲氰WG。

In order to select fungicide with best control effect on potato＇s late combination have been chosen as experimental materials. The results show blight, eight fungicides or their that except 50% carbendazim, other seven fungicides or combination have obvious control and yield-increase effect on late blight by apply- ing 5 times successively with control efficiency of over 93%, yield-increase rates of 18.15%-31.1% and net-income increase of 911.0-1475.0 Yuan/667 m2. According to these fungicides＇control effect, several rec- ommended fungicides or combinations have been put forward.