江苏小麦全蚀病田间消长规律及轮作控病效果

THE OCCURRENCE AND CULTURAL CONTROL oF WHEATTAKE-ALLIN JIANGSUPROVINCE

据徐州、淮阴、连云港、盐城等市不同种植类型麦田系统调查结果，江苏小麦全蚀病田间消长动态大致可分为４个阶段：冬前期、越冬期、盛发期和高峰期。不同种植类型田病害发生程度存在明显差异；玉米茬口的连作田重于大豆、棉花茬口的连作田；旱连作田重于旱轮作田；旱轮作田重于水旱轮作田。非寄主作物的轮作、特别是水旱轮作对全蚀病有显著的控病作用。

The investigation indicated that the occurence of wheat take-all in Jiangsu province can be di-vided into four stages,1.e。disease appearing stage before winter, slowly spreading stage during winter,quickly spreading stage in spring and peak stage after heading(whiteheads appearing period).There is obvi-ous difference in the disease severity among different plantlng(rotation)types,The disease is most serious inthe fields of wheat following corn, but it is less serlous in the fields of wheat following soybean, cotton andother non-susceptible crops.The disease can be effectively controlled in the rotation fields of wheat following rlce。