氟硅唑与代森锰锌混配对梨黑星病菌的联合毒力及田间防效  

Joint-toxicity and field efficacy of mixtures of flusilazole and mancozeb against Venturia nashicola

作　　者：赵建江[1] 张小风[1] 王文桥[1] 马志强[1] 韩秀英[1] 

机构地区：[1]河北省农林科学院植物保护研究所、河北省农业有害生物综合防治工程技术研究中心、农业部华北北部作物有害生物综合治理重点实验室,保定071000

出　　处：《植物保护》2014年第3期195-198,共4页Plant Protection

基　　金：公益性行业(农业)科研专项(200903033)

摘　　要：为了明确氟硅唑与代森锰锌混配对梨黑星病菌的联合毒力,采用菌丝生长速率法测定了氟硅唑、代森锰锌及其不同配比对梨黑星病菌的毒力,以Wadley公式进行评价,并通过田间试验验证其对梨黑星病的防治效果.结果表明：氟硅唑与代森锰锌质量比为1∶20、1∶25、1∶30、1∶35和1∶40进行复配对菌丝生长均表现为增效,其中1∶25增效作用最明显,增效系数为2.68;在田间药效试验中,40％氟硅唑乳油与80％代森锰锌可湿性粉剂,以质量比1∶25进行桶混,750～1 200倍稀释对梨黑星病的防治效果均在85％以上,与其单剂40％氟硅唑乳油8 000倍和对照药剂10％苯醚甲环唑水分散粒剂7 000倍对梨黑星病的防治效果相当,但显著高于其单剂80％代森锰锌可湿性粉剂700倍的防治效果.氟硅唑与代森锰锌以1∶25进行桶混,可以在田间推广使用.In order to clarify the synergistic interaction of flusilazole and mancozeb against Venturia nashicola,the toxicity of flusilazole,mancozeb and their mixtures at different ratios against V.nashicola was determined by mycelial growth rate test,the joint-toxicity of the two fungicides was assessed with Wadley formula,and the efficacy on controlling pear scab was assessed by field trials.The results showed that the mixtures of 1 ∶ 20,1 ∶ 25,1∶30,1∶35 and 1∶40 exhibited synergistic interaction on the mycelial growth.The synergistic effects of the 1∶ 25mixture was the most obvious with synergistic ratio of 2.68.The field trials demonstrated that the mixture 750-1 200 times of flusilazole with mancozeb （1∶25,W/W） exhibited good control effect,with efficacy of over 85%,equal to that of flusilazole 400 EC 8 000 times and difenoconazole 100 WG 7 000 times,respectively,significantly higher than that of mancozeb 700 WP.The mixture of flusilazole with mancozeb （1 ∶ 25,W/W） can be widely applied in the fields.

关 键 词：氟硅唑 代森锰锌 梨黑星病菌 增效作用 田间防效 

分 类 号：S482.2[农业科学—农药学]