刺槐干腐病是一种毁灭性病害,在江苏省各地普遍发生。经分离培养、接种和再分离试验,证明病原为樟疫霉。病原菌自伤口侵入,可侵害2—15年以上生的刺槐根干,引起内皮层腐烂,致使植株枯萎死亡。病部后期常出现腐生的镰刀菌分生孢子座。病害多生在干基部,5—9月为发病盛期。病株根际土壤和植株病组织都是侵染源。 Robinia pseudoacacia is a devastating disease commonly occurring in various parts of Jiangsu Province. After separation culture, inoculation and re-separation test to prove that the pathogen is Phytophthora capsici. Pathogenic bacteria invade from the wound, can be infested 2-15 years of roots of Robinia pseudoacacia, causing endothelium decay, resulting in plant wilt death. Sickle conidia often appear saprophytic condyloma later in the disease department. Diseases occur in dry base, 5-9 months for the peak incidence. The diseased rhizosphere soil and plant diseased tissues are the source of infection.