日本菟丝子Cuscuta japonica Choisy在我国南北各省均有分布,危害木本植物的1年生茎寄生草本。茎较粗壮,直径1—2mm,常具紫红色瘤状斑点。在4—5月萌发,出土幼苗通过附近杂草作桥梁或直接缠绕寄主植物后产生吸器穿入寄主组织,吸收水份和养料,反复分枝,迅速向上和四 Cuscuta japonica Choisy Japanese cedar in the north and south provinces of our country are distributed, endangering the woody plant 1 year old stem parasitic herb. Stems thicker, diameter 1-2mm, often with magenta tumorous spots. In April-May germination, unearthed seedlings through the bridge near the weeds or wound directly around the host plant after the suction device penetrates the host tissue, absorbing water and nutrients, repeatedly branching, rapidly up and four