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热带水稻病害热带亚州水稻的主要真菌病害有稻瘟病、纹枯病、稻小球菌黑病和胡麻斑病。稻瘟病在世界各地都有发生,是水稻最严重的一种病害。稻瘟病病原变异很大,在水稻生长区域内有很多不同的小种。水稻从幼苗到开花期都可遭受稻瘟病为害。纹枯病和小球菌黑病多在一定的季节发生。除直接造成减产外,这两种病害还会使茎杆软弱而易发
Tropical Rice Diseases The main fungal diseases of tropical Asia rice are rice blast, sheath blight, small-ball black-boring disease and flage spot. Rice blast has occurred all over the world and is one of the most serious diseases of rice. The pathogen of blast is very variable and has many different races in the rice growing area. Rice is susceptible to rice blast from seedling to anthesis. Sheath blight and small ball black disease occurred in a certain season. In addition to the direct result of reduced production, these two diseases will also make the stem weak and prone