小麦秆锈病防治指标研究  

Study on Economic Threshold of Wheat Stem Rust

作　　者：王澍[1] 曹远银[1] 李天亚[1] 宋晶晶[1] 

机构地区：[1]沈阳农业大学植物保护学院,辽宁沈阳110866

出　　处：《河南农业科学》2011年第9期78-80,共3页Journal of Henan Agricultural Sciences

基　　金：农业部"948"项目(2006-G2);公益性行业(农业)科研专项(200903035)

摘　　要：为考察小麦秆锈病的防治指标,在小麦自然生长条件下,以绵阳11号、浙麦1号和龙麦30号3个具有不同抗感性的小麦品种为研究对象,通过对不同病情与产量损失关系的研究,分别构建了3个品种开花期病情(X2)与产量损失率(L)之间的回归方程,其中高感品种绵阳11号的方程为:L=-1.689+1.185X2(R=0.981,SLx=5.737)。结合经济允许损失水平模型,计算得到高感品种开花期小麦秆锈病的防治指标为病情指数3.7。另外还建立了绵阳11号抽穗期病情(X1)和乳熟期病情(X3)的产量损失估计模型,即L=0.139+0.433X1+0.532X3(R=0.999,SLx=1.317)。建立的产量损失模型在小麦品种上具有一定的代表性和广泛性,而具体的防治指标可能存在地域差异。This study aimed to determine economic threshold of wheat stem rust disease using three wheat varieties with different resistance ability in the field test. The parper analyzed the relationship between disease indexes in bloom period（X2） and yield loss（L）,and further constructed the wheat yield loss models of 3 wheat varieties,of which Mianyang 11 （a high sensitive variety） was L=-1. 689＋1. 185X2 （R=0. 981,SLz=5. 737）. According to the model above,the economic threshold of the wheat stem rust of high sensitive varieties in bloom period was 3.7. An other model was also constructed according to disease indexes of Mianyang 11 at heading stage （X1）and milk stage（X3）,L=0. 139＋0. 433X1 ＋0. 532X3 （R=0. 999,SLa：= 1. 317）. The yield loss models established were of a certain representation and universality as to wheat varieties, while specific prevention indicators might be of regional differences.

关 键 词：小麦 秆锈病 产量损失 防治指标 

分 类 号：S435.121.41[农业科学—农业昆虫与害虫防治]