威胁晚稻生产的稻瘟病主要是后期的穗瘟。因此,抓好晚稻穗瘟的防治工作对于提高晚稻产量十分重要。现将近三年来有关穗瘟的初步调查观察结果简述如下,供参考。一、穗瘟的发生过程据初步观察,穗瘟不同部位的发病过程,大体可划分为三个阶段,即破口至齐穗阶段的谷粒瘟,灌浆初期的穗颈瘟、枝梗瘟以及乳熟以后的枝梗瘟(当然,这种划分也 The rice blast threatening the production of late rice is mainly the late stage of panicle blast. Therefore, it is very important to do a good job in the prevention and control of late rice blast. Now nearly three years of preliminary findings of panicle blast observations are summarized below for reference. First, the occurrence of head blast According to preliminary observations, panicle blast disease in different parts of the process can be divided into three stages, that is, break to the whole stage of the panicle blast, grain filling early stage panicle blast, branch stem blast and Mildew blast after milking (of course, this division also