不同药剂组合对马铃薯晚疫病的防治效果分析

Control Efficiency of Different Fungicide Combinations on Potato Late Blight

马铃薯晚疫病是马铃薯生产中的主要病害之一,在定西市马铃薯种植区发生普遍、危害重,生产中利用杀菌剂防治仍是重要的措施。试验采用随机区组法研究了不同药剂组合对马铃薯晚疫病防效和产量的影响。结果表明,72%霜脲·锰锌1 950 g/hm^2+23.4%双炔酰菌胺450 m L/hm^2+250 g/L醚菌酯280 m L/hm^2+687.5 g/L氟菌·霜霉威980 m L/hm^2和80%代森锌1 350 g/hm^2+25.75%多抗·福美双1 900 g/hm^2+28%霜脲·霜霉威2 500 g/hm^2+52.5%噁酮·霜脲氰570 g/hm^2组合具有显著的防治效果。

Potato late blight is one of the major potato diseases. It has been the most prevalent and widespread in the major areas of potato production in Dingxi City, Gansu Province. Production and quality of potato are more severely affected by potato late blight. Use of fungicides is still an important method for preventing this disease in field production. Control efficiency and yield losses were studied using different combinations of fungicides on potato late blight in this experiment. The results showed that the effective combinations were Cymoxanil · mancozeb（72%） 1 950 g/ha ＋ Mandipropamid（23.4%） 450 m L/ha ＋Kresoxim- methyl（250 g /L） 280 m L/ha ＋ Fluopicolide- propamocard（687.5 g/L） 980 m L/ha, and Zineb（80%） 1 350 g/ha ＋Multithiram（25.75%） 1 900 g/ha ＋ Cream urea propamocarb（28%） 2 500 g/ha ＋ Evil ketone eymoxanic（52.5%） 570 g/ha.