花生根腐病,俗称鼠尾、烂根。在花生各生育期均有发生。花生播后出苗前染病,可引起烂种、烂芽。该病从表面上看叶片发黄,常易误认为是缺少营养。一、发病症状(表1)二、发病规律花生根腐病由半知菌亚门的镰刀菌侵染所引起。病菌习居土壤中,在土中能存活数年,属维管束寄生菌,可堵塞导管和分泌毒素而使植株枯萎。病菌主要随病残体 Peanut root rot, commonly known as rat tail, rotten roots. Peanut in all growth stages have occurred. Peanut sowing before emergence of disease, can cause rotten, rotten buds. The disease from the surface yellow leaves, often mistaken for lack of nutrition. First, the incidence of symptoms (Table 1) Second, the incidence of peanut root rot disease caused by Fusarium semiautophila subfamily infection. Bacteria colonize the soil, in the soil can survive for several years, is a vascular bundle parasites, can plug the duct and secrete toxins and plants wilt. Diseases mainly with the sickness