不同杀菌剂对马铃薯晚疫病的田间防效试验

马铃薯晚疫病是马铃薯生产中一种普遍发生、危害严重的病害,杀菌剂防治该病仍是生产中采用的主要措施。本试验采用氟吡菌胺和霜霉威、噁霜·锰锌、烯酰吗啉和多菌灵4种农药,从发病初期开始连续进行2次施药防治晚疫病。结果表明,4种杀菌剂均有较好的防治效果,68.75%氟吡菌胺和霜霉威SC 1000倍、64%噁霜·锰锌WP 300倍、50%烯酰吗啉WP 1500倍和50%多菌灵WP 500倍施用2次后,平均防治效果分别为76.8%、70.0%、71.0%和62.0%,前3种杀菌剂的防效明显好于后者。

Control Efficacy of Different Fungicides on Potato Late Blight in Field

Potato late blight is a widespread and serious disease in potato production.Use of different fungicides for control of late blight is still the main measure adopted in the production.This experiment used fluopicolide and propamocarb,oxadixyl mancozeb,dimethomorph and carbendazim to control late blight by two applications starting at early stage of the disease.The results showed that the four fungicides all had control effects.After continuous spraying two times,the average control effect of 68.75% fluopicolide and propamocarb SC 1000 times,64% oxadixyl mancozeb WP 300 times,50%dimethomorph WP 1500 times and 50% carbendazim WP 500 times was 76.8%,70.0%,71.0% and 62.0%,respectively.The first three fungicides were significantly better than the latter for control of late blight.