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小麦雪腐叶桔病(Fusarium nivale(Fr)Ges)1961年在陕西首次发现,近年随着栽培水平的提高和矮秆品种的推广,关中地区经常发生,且有加重的趋势,已成为小麦矮化育种工作中一个值得重视的问题。另外在青海东部、甘肃武都、四川成都,西藏以及江苏省的一些地区都有发生的报导。1985年我们在本区永良4号、斗地1号及引进的墨西卡里75(硬粒小麦)品种上初次发现此病,而且病情相当严重。一、症状自幼苗到成熟前均可发生。麦苗感病后,叶鞘变黄褐至深褐色,有的向内发展,侵染茎秆,在茎秆上呈暗褐色稍凹陷的条斑,严重时植株矮化,影响拔节和抽穗。孕穗期在叶片上出现1—4厘米病斑,圆形或椭圆形,初为淡黄色或水渍
Fusarium nivale (Fr) Ges was first discovered in Shaanxi Province in 1961. In recent years, with the improvement of cultivation level and the promotion of dwarf varieties, Guanzhong area has been frequently and aggravatingly trend, One of the most important issues in breeding work. In addition, reports have taken place in eastern Qinghai, Wudu, Gansu, Chengdu, Tibet and some areas in Jiangsu Province. In 1985, we found the disease for the first time in Yongliang No. 4, Tiandi No. 1 and the introduced Mecca 75 (Durum) varieties in this area, and the condition was rather serious. First, the symptoms can occur from young seedlings to mature before. After the wheat seedlings were infected, the sheaths turned yellowish brown to dark brown, some developed inwardly, and invaded the stalks. Streaks appeared slightly dark brown on the stalks. In severe cases, the plants dwarfed and affected the jointing and heading. Booting stage in the leaves 1-4 cm spot, round or oval, the beginning of the light yellow or water stain