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稻瘟病稻瘟病又名稻热病,俗称火烧瘟、吊头瘟、掐颈瘟等,是流行最广、危害最大的世界性真菌病害之一,主要危害寄主植物的地上部分。由于危害时期和部位不同,可分为苗瘟、穗颈瘟、枝梗瘟、粒瘟等。寄主是水稻、小麦、马唐等多种禾本科植物。稻瘟病病菌主要在病稻草上越冬,第二年从病稻草上传入稻田中侵染为害。病菌传播主要靠风传播,雨、水流、昆虫也可传播。天气转暖,又有雨淋的情况下,越冬病菌会大量复苏、增殖,从堆在田边的病稻草上转移到水稻植株上为害。
Rice blast, also known as rice fever, commonly known as the fire plague, ceiling blast, pinch neck blast, etc., is the most popular and most damaging one of the world fungal diseases, the main hazard to host plant aerial parts. As the hazards of different parts and can be divided into seedling blast, panicle blast, branch stem blast, grain blast and so on. The host is rice, wheat, Crabgrass and other grasses. Pyricularia oryzae mainly overwintered in the sick straw, and the second year was infected by the infected rice which was introduced into the paddy field. Pathogen spread mainly by wind, rain, water, insects can also spread. When the weather gets warmer and rainy again, overwintering germs will recover and multiply in large quantities, causing damage from the piles of straw on the edge of the fields to the rice plants.