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Morphological characteristics Stems erect, plant height 20-150cm, with branches, with hairs. Leaves opposite or alternate, 1–2 pinnately divided, lobes strips with short, rough hairs. Head flower unisexual, mostly male flower heads, racemes forming at the top of the branches, total septum-shaped, corrugated dentate; female sessile inflorescences stalk, born in male lower inflorescence at the tip of axils, 2-3 Clusters of flowers or solitary flowers, each with a female flower without flowers. The achene is wrapped in a total filet, and it is always ovate. There are 5-8 short beaks around and a conical beak at the tip. Seeds are carried along with crops, water, and vehicles.
Ecological characteristics are born in wastelands, roadsides, ditches, around plots or in farmland. The grass has strong viability, wide adaptability, high seed yield, high water consumption and nutrients, and strong growth, covering and suppressing crops and impeding agricultural operations.
Ragweed
Scientific name Ambrosia artemisiifolia L. An annual herb of the Asteraceae family. Alias ​​rag leaf. Distributed in the Yangtze River Valley, Northeast China, Shandong and other places. It is a dangerous weed that affects human health and agricultural production.
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