有读者来电了解小麦赤霉病在什么时间用药防治效果好?去年有一块田在小麦刚开始抽穗时第一次用药防治赤霉病,初花期再用药防治一次,小麦没有发生赤霉病;另一块田在小麦扬花株率达三分之二时用药,赤霉病发生较重。 A reader calls to understand when the wheat scab disease medication control effect is good? Last year there was a field in the beginning of wheat heading for the first time to control the scab, the first flowering and then medication once, no scab occurred in wheat; the other A field in wheat flowering plant rate of two-thirds medication, severe head blight.