庞杰 叶毅 玉家汉 苏培娇 黄校华 邓钦阳 张小燕

摘要：【目的】筛选出更适合本地防治马铃薯晚疫病的药剂，为开展化学防治提供参考。【方法】选用6种药剂进行马铃薯晚疫痛防治效果比较试验。【结果】供试的6种药剂对防治马铃薯晚疫病表现出一定的防治效果，其中以68.75%氟菌·霜霉威SC 80mL/667m2的防治效果最佳，施药后lOd和14d，防治效果分别为82.48%和81.84%;其次为50%唑醚·喹啉铜WG 24mU667m2，施药后lOd和14d，防治效果分别为81.75%和81.23%;其他几种药剂施药后lOd和14d防治效果在7 1.20% -79.37%之间，均达70%以上;6种药剂按推荐用量使用无药害发生。【结论】建议生产应用68.75%氟菌·霜霉威SC 80mU667m2和50%唑醚·喹啉铜WG 24mL/667nl2等两种药剂防治马铃薯晚疫病，在发病初期开始用药，间隔lOd啧施1次，即可控制晚疫病的蔓延。

关键词：马铃薯;晚疫病;杀菌剂;药效试验

中图分类号：S435.32

文献标识号：A 文章编号：1003-4374（ 2021） 06-0022-03

Field Control Effects of Different Fungicides on Potato Late BlightPang Jiel ， Ye Yjl . Yu Jia_han2 ， Su Pei-jiao l ， Huang Xiao_hua2 ， Deng Qin-yang2 ， Zhang Xiao-yan2 （ 1. Qinbei District Bureau of Agriculture and Rural Affairs ， Qinzhou， Guangxi 535099 ， China;2.Qinbei District Station of Plant Protection & Plant Inspection， Qinzhou.Guangxi 535099， China ）Abstract： [Objective ] To screen out more suitable fungicides for the local control of potato late blight，and provide reference for chemical control. [Method] Six kinds of fungicides were applied to comparethe control effect of potato late hlight.

[ Result] The six fungicides tested showed certain control effecton potato late blight control，among which 68.75% Fluoride propamocarb SC 80mU667m2 was the best.and the control effect was 82.48% and 81.84% on lOd and 14d af'ter application， respectively. Then was50% Azoalkyl ether Oxine-copper WG 24mU667m2.lOd and 14d after application，the control effectwas 81.75% and 81.23% ，respectively. The control eff'icacy of the other fungicides ranged from 71.20%to 79.37% at lOd and 14d after application. reaching more than 70%. No harm occurred when six kindsof fungicides were applied according to the recommended dosage. [Conclusion] It is suggested toapplied 68.75% Fluoride propamocarb SC 80mU667m2 and 50% Azoalkyl ether Oxine-copper WG24mL/667m2 to control potato late blight. The spread of potato late blight can be controlled by sprayingit once at an interval of 10 days.Keywords： potato ， late blight ， fungicides ， efficacy test

馬铃薯是我国四大粮食作物之一，我国马铃薯种植面积和产量常年位居世界前列。[1]钦州市钦北区是双季稻地区，马铃薯的种植以冬季为主，晚疫病是影响当地马铃薯生产的主要病害。马铃薯晚疫病又称疫病、马铃薯瘟，是由真菌致病疫霉[Phytoph-thora infestan.s（ Mont.）de Bary]引起。[2]在叶、茎及块茎上均表现出症状，在叶片上往往发生于叶片的顶端或叶缘，开始为水浸状斑点，天气潮湿时病斑迅速扩大，在病斑边缘有白色稀疏的霉状物，叶背面白霉更清楚;严重时病斑扩展到叶柄和茎上，产生褐色条状斑点，使叶片萎蔫，干枯下垂，最后整个植株变为焦黑，呈湿腐状;块茎发病时表皮变淡褐色斑点或灰紫色不规则形病斑，组织下陷，影响产量和品质。……