一、病害发生情况及特点稻曲病在开花后至乳熟期均可发生,只危害谷粒。病菌在颖壳内生长,受害谷粒先稍张开,露出黄绿色的小型块状突起,后逐渐膨大,包裹全颖,渐变为绿色后龟裂,散布出黑绿色粉末,略带粘性,不易飞散,但可借气流传播,在水稻开花时侵染花器和幼颖,使稻谷千粒 First, the occurrence of disease and characteristics False false smut in flowering to milky maturity can occur, only endanger grain. The germs grow in the glume shell. The harmed grains are slightly open first, exposing yellow-green small lumps and then gradually expanding. After the package is full-fledged, it is gradually cracked into green and cracked. The black-green powder is scattered and slightly sticky. Fly scattered, but can be spread by air, inflorescence flowers and young Ying in the flowering of rice, the 1000 grains of rice