谷子线虫病又称紫穗病或倒青,病原为贝西滑刃线虫,是我国谷子的重要病害,在河北中南部、山东、河南等夏谷区发生普遍,严重地块可减产50%~80%。1.病害特征线虫病可侵染谷子的根、茎、叶、叶鞘、花、穗和籽粒,但主要危害花器、子房,只在穗部表现症状。因大量线虫寄生于花部破坏子房,因而不能开花,即使开花也不能结实,颖片多张 Millet nematode disease, also known as purple or inverted, the pathogen is Berberis, is an important disease of millet in China, central and southern Hebei, Shandong, Henan and other summer valley area of ​​occurrence of common, severe mass production can be reduced 50% 80%. 1. Disease characteristics Nematode infection of millet roots, stems, leaves, sheaths, flowers, spikes and grains, but the main hazards flower, ovary, only in the ear symptoms. Because of a large number of nematodes parasitism in the Ministry of flower destruction of ovary, and therefore can not flowering, even if the flowering can not be strong, more than one glume