测定一些高等植物的叶汁毒性对土壤病原微生物的抵抗能力

Out of the leaf juices of eighteen plant species screened, only Eupatorium cannabinum exhibited complete toxicity against Pythium debaryanum, Fusarium oxysporum, Rhizoctonia solani and Sclerotium rolfsii. Shade drying of the leaves had no adverse effect, while oven drying produced an adverse effect on the fungitoxicity of the leaves of E. cannabinum. The crude leaf juice of E.cannabinum successfully inhibited damping-off (Fusarium oxysporum) infection of Pisum sativum seedlings.