菟丝子是寄生性种子植物,对花木的生长危害极大。被害的花木呈现黄化、生长不良、叶片窄小而扭曲、不开花或花朵变小;且蔓延快,可造成大面积枯黄,严重影响花木的正常生长及观赏效果。菟丝子无根无叶,或叶片退化成鳞片状,藤茎呈丝状,黄色或紫色,花很小,种子成熟后落入土中或混杂于寄主植物种子内,次年萌发,种胚一端形成丝状在空中旋转,碰到寄主就缠绕其上,在接触处形成吸盘侵入寄主组织内,吸取养分和水分。当与寄主建立关系后就与地下部分脱离。其断茎也能继续生长,进 Dodder is a parasitic seed plant, great harm to the growth of flowers and trees. The flowers were yellowing, poor growth, narrow and narrow leaves, not flowering or flowers become smaller; and spread quickly, can cause large areas of yellow, seriously affect the normal growth and ornamental effect of flowers and trees. Dodder rootless leaves, or leaves degenerated into a scale-like, cane was filiform, yellow or purple, flower is very small, the seeds fall into the soil or mixed in the host plant seeds, germination the following year, one end of embryo formation The filaments rotate in the sky and hit the host to wind on it. A sucker is formed in the contact area to invade the host tissue and absorb nutrients and moisture. When the relationship with the host after the underground part of the separation. Its broken stem can continue to grow, into