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刺槐干腐病病原为樟疫霉菌(phytop-hthora cinnamomi),经土壤传播,伤口是病原侵染发病的先决条件.以往对自然界造成刺槐地下部伤口的原因未作系统研究,近两年我们作了一些观察,初步结果如下:一、病原菌接种试验1980年曾于赣榆、泗洪等县林间选择无病刺槐,分别在树干基部及根部进行刺伤、烫伤接种,证明伤口接种均可发病,无伤不发病.约80%以上的病斑发生在干基部表土层下.近期在淮阴县杨庄无病刺槐林,对表土层下根、基干的芽眼、皮层进行了接种保湿试验,结果病菌不侵染正常芽眼和皮层组织.芽眼经轻度刮伤可发病,皮层不发病;但刺伤接种均可发病,发病率达100%.
Robinia pseudoacacia dry rot pathogen is Campylobacter (Phytophthora cinnamomi), spread through the soil, the wound is a prerequisite for the pathogenesis of infection in the past on the cause of the wounds of the locust caused by locusts in the past did not make a systematic study of the past two years we Some observations, the preliminary results are as follows: First, the pathogen inoculation test In 1980 Ganyu, Sihong and other forest selected non-disease Robinia, respectively, at the base of the trunk and root stab wounds, burns vaccination, that wounds can be vaccinated , No injury without disease.About more than 80% of the lesions occurred in the dry base of the topsoil.Recently in Huaiyin County Yangzhuang disease-free Robinia pseudoacacia Lin, topsoil roots, stem buds, cortex inoculated moisturizing test, the results Bacteria do not invade the normal bud eye and cortical tissue. Occurred by mild scratching the eye can occur, the cortex does not get disease; but the sting can inoculate the incidence of disease, the incidence of 100%.