杂交稻优势强产量高,各地正在推广。但是,由于杂交水稻的生理生化性状不同于常规稻,因而对某些病害的感受程度也不同于常规稻。有些组合能抗白叶枯病(如“威优6号”、“威优64”等),有些则易感白叶枯病(如“汕优2号”),若作二晚栽培,也能抗晚稻穗颈瘟。但原来我省某些很少见的病害目前却正在推广的杂交稻上逐步扩大发生,在某些地区还造成了较严重的损失。两年来,下述4种病害的发生为害已引起了有 Superior yield of hybrid rice high yield, is being promoted around. However, since the physiological and biochemical traits of hybrid rice are different from those of conventional rice, their susceptibility to certain diseases is also different from that of conventional rice. Some combinations are resistant to bacterial blight (eg “Weiyou 6”, “Weiyou 64”, etc.), while others are susceptible to bacterial blight (such as “Shanyou 2”). For two-night cultivation, Can fight late rice panicle neck blast. However, some rare diseases in our province are gradually expanding on the hybrid rice that is being promoted at present, and in some areas, serious losses have also been caused. In the past two years, the following four kinds of diseases have caused the damage