Malignant Weed

Alternative stage between perennial herb with rhizome and annual malignant weed ;

具根茎的多年生禾草和一年生恶性杂草交替占优势的草坪杂草阶段；

Study on the Investigate and Chemistry Controlling of Malignant Weed in Seed Product Field of Agropyron Mongolicum Keng

蒙农1号蒙古冰草种子田杂草调查与化学防除研究

Especially to some malignant weed like Desmodium triflorum , creeping wood sorrel and Hydrocotyle sibthorpioides .

特别是对一些恶性杂草如：三点金、酢浆草和天胡荽等可以彻底杀根。

Ragweed ( Ambrosia artemisiifolia ), which is recognized as a kind of malignant invasion weed , and it has been spreading in the world . It could make enormous threat on the ecological safety , development of agriculture and human health in the invaded areas .

豚草是世界性恶性入侵杂草，在世界各地广泛蔓延传播，对入侵地的生态安全、农牧业生产及人类健康构成巨大威胁。