马铃薯晚疫病菌对不同药剂敏感性及相应药剂田间防效验证

被引:18
作者
罗彦涛 [1 ,2 ]
孟润杰 [2 ]
赵建江 [2 ]
韩秀英 [2 ]
马志强 [2 ]
王文桥 [2 ]
张小风 [2 ]
机构
[1] 河北农业大学植物保护学院
[2] 河北省农林科学院植物保护研究所
关键词
马铃薯晚疫病菌; 杀菌剂; 敏感性; 田间防治效果;
D O I
10.16820/j.cnki.1006-0413.2016.02.015
中图分类号
S435.32 [马铃薯(土豆)病虫害];
学科分类号
摘要
[目的]确定马铃薯晚疫病菌对不同杀菌剂的敏感性并通过田间药效试验加以验证。[方法]采用菌丝生长速率法测定从吉林敦化市和河北围场县采集的马铃薯晚疫病菌对药剂的敏感性,并进行田间药效试验验证。[结果]2地的晚疫病菌对甲霜灵的抗性频率均达100%,菌株均为高抗,抗性水平高达上万倍;对嘧菌酯、霜脲氰、烯酰吗啉抗性频率为0~63.6%,抗性水平为0.33~2.84倍,抗性菌株均为低抗;对氟吡菌胺抗性频率高达84.6%100%,但抗性菌株均为低抗,抗性水平为3.56~3.90倍;按照推荐剂量4次施药后第7天,58%甲霜·锰锌WP及68%精甲·锰锌WG的防效均显著低于80%代森锰锌WP的防效,而72%霜脲·锰锌WP、50%烯酰吗啉WP、250 g/L嘧菌酯SC和687.5 g/L氟菌·霜霉威SC具有良好防效。[结论]田间抗性发生情况为相应产品的田间药效所验证:马铃薯晚疫病菌对甲霜灵产生严重抗性而导致58%甲霜·锰锌WP及68%精甲·锰锌WG中甲霜灵或精甲霜灵防效丧失及58%甲霜·锰锌WP及68%精甲·锰锌WG防效降低,而晚疫病菌对霜脲氰、烯酰吗啉、嘧菌酯、氟吡菌胺仍保持敏感,72%霜脲·锰锌WP、50%烯酰吗啉WP、250 g/L嘧菌酯SC、687.5 g/L氟菌·霜霉威SC仍可用于马铃薯晚疫病的防治。
引用
收藏
页码:134 / 137
页数:4
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