戊唑醇与羟菌唑对小麦赤霉病的防治效果及对小麦产量的影响  

Effect on development of disease severity of Fusarium head blight and grain yield in the wheat treated with fungicides tebuconazole and metconazole

作　　者：韩青梅[1] 康振生[1,2] 段双科[3] 

机构地区：[1]西北农林科技大学生物技术中心 [2]西北农林科技大学植物保护学院,陕西杨凌712100 [3]西北农林科技大学植物保护学院

出　　处：《西北农林科技大学学报（自然科学版）》2005年第7期40-44,共5页Journal of Northwest A&F University(Natural Science Edition)

基　　金：国家"十五"科技攻关项目(2001BA509B03);国家杰出青年基金项目(30125031)

摘　　要：通过室内和田间药效试验,研究了新型三唑类杀菌剂戊唑醇与羟菌唑对小麦赤霉病的防治效果。温室盆栽试验结果表明:25%的戊唑醇(3.15mL/L)、6%的羟菌唑(3.75mL/L)可有效控制赤霉病菌在小麦穗部小穗之间的扩展,防效高于多菌灵常规用量。田间药效测定结果表明:与对照相比,接种前2d喷药与接种后2d喷药,2001年,戊唑醇可使小麦赤霉病病情指数分别减少80.32%和70.64%,产量增加12.95%与8.74%;羟菌唑可使小麦赤霉病病情指数减少80.5%和68.0%,产量增加11.41%和11.45%;2002年,在小麦赤霉病严重发生的情况下,戊唑醇能使小麦赤霉病病情指数减少76.47%和78.67%,羟菌唑能使小麦赤霉病病情指数减少82.06%和81.89%,产量增加极显著。说明这2种药剂可以作为防治小麦赤霉病的替代品种。Tebuconazole and metconazole have been proven to be ideal fungicides for protection and cure of Fusarium head blight of wheat in this studies.The results in greenhouse experiment showed that tebuconazole (3.15 mL/L) and metconazole (3.75 mL/L) were significant for controlling development of Fusarium graminearum on wheat spikes.The control effect was higher than carbendazim.Filed experiments of 2001 showed that treatments with fungicide either 2 days before or 2 days post inoculation,tebuconazole reduced the disease index of the spikes by 80.32% and 70.64%,as well as increased grain yield by 12.95% and 8.74% in comparison to the untreated control.Application of metconazole led to decreases of the disease index by 80.5% and 68.0% and increases of grain yield by 11.41% and 11.45% compared with the untreated plants.In 2002,with the serious occurrence of the head blight,tebuconazole reduced the disease index of the spikes by 76.47% and 78.67% and metconazole reduced the disease index by 82.06% and 81.89% in comparison to the untreated control.The results demonstrated that two fungcides may be substitutes for controlling Fusarium head blight of wheat.

关 键 词：小麦赤霉病 防治效果 羟菌唑 戊唑醇 小麦产量 病情指数 田间药效试验 三唑类杀菌剂 2001年 2002年 试验结果 温室盆栽 赤霉病菌 有效控制 测定结果 替代品种 多菌灵 喷药 接种 小穗 穗部 防效 重发 

分 类 号：S435.121.4[农业科学—农业昆虫与害虫防治] TQ455.47[农业科学—植物保护]