小麦品种混播条件下条锈病发生、扩展研究  

Occurrence and expansion of wheat stripe rust under mixed-cultivar planting

作　　者：郭世保[1] 黄丽丽[1] 康振生[1] 程晶晶[1] 杨之为[1] 

机构地区：[1]西北农林科技大学植物保护学院陕西省农业分子生物学重点实验室,杨凌712100

出　　处：《中国生态农业学报》2010年第1期106-110,共5页Chinese Journal of Eco-Agriculture

基　　金：国家重点基础研究发展计划(973计划)项目(2006CB100203);国家科技支撑计划项目(2006BAD08A05);教育部长江学者和创新团队发展计划项目(200558);高等学校创新引智计划项目(B07049);现代农业产业(小麦)技术创新体系建设专项资金资助

摘　　要：在田间分别设计6个小麦品种单播及其9个组合混播小区,研究条锈病在小麦混播群体中的发生、扩展情况及品种混播对条锈病的控制效果。结果表明,苗期品种混播小区发病中心的数量明显减少,条锈病发病中心越冬率达77.78%,单片病叶也可越冬。品种混播降低了条锈病传播距离,条锈病在各小区呈中心式分布。品种混播在孕穗期的相对防效为16.25%～58.89%,平均为35.31%。相对防效以"陕138"和"西农979"品种混播及"陕138"、"小偃22"和"西农889"品种混播最高,分别达58.89%和52.19%。品种混播对小麦条锈病有较好的控制效果,可作为生态防病措施之一。Six mono-cultivar planting treatments and nine mixed-cultivar planting treatments were designed to study the occurrence and expansion of wheat stripe rust （Puccinia striiformis f.sp.tritici） and control effect of mixed-cultivar planting.The results indicate that the number of foci at seedling stage obviously reduces under mixed-cultivar planting compared with mono-cultivar planting.Over-wintering rate of foci is 77.78% and a few single diseased leaves survive after winter.The spreading distance of stripe rust is shorten on mixed-cultivar plots.Stripe rust shows a trait of central distribution in different plots.Relative efficacy of mixed-cultivar planting at booting stage ranges from 16.25% to 58.89%,with a mean value of 35.31%. ＂Shaan 138＂ and ＂Xinong 979＂ mixed-planting,and ＂Shaan 138＂,＂Xiaoyan 22＂ and ＂Xinong 889＂ mixed-planting show the highest relative efficacy,which is 58.89% and 52.19% respectively.Mixed-cultivar planting has a higher control effect on wheat stripe rust than mono-cultivar planting.Mixed-cultivar planting can thus be used as a good ecological measure in disease prevention and control.

关 键 词：小麦条锈病 品种混播 相对防效 病害流行时间动态 

分 类 号：S181[农业科学—农业基础科学] S432.1