The scientific name is Comnyza canadensis (L.) Cronq. It is a chrysanthemum-born or annual herb. Alias ​​small white wine grass, small Fei Lian. Distributed in the northeast, Shaanxi, Shanxi, Hebei, Henan, Shandong, Zhejiang, Jiangxi, Hubei, Sichuan, Taiwan and other provinces. The main damage is cotton, wheat, fruit trees, vegetables and so on.
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Morphological characteristics Stems erect, plant height 50-100cm, with coarse hair and fine stripes. Leaves alternate, petiole short or inconspicuous. Leaves narrowly lanceolate, entire or slightly serrate, with long lashes. The heads are short-stemmed and often form a cone. Total hemispherical, total sepal 2-3 layers, lanceolate, marginal membranous, ligulate flowers erect, small, white to slightly purplish, tubular flowers shorter than ray flowers. Achenes flat oblong, hairy, crown hair white. Seed breeding.
Ecological characteristics are born in the floodplain, canal, roadside or farmland, and are easy to form large communities.
Morphological characteristics Stems erect, plant height 50-100cm, with coarse hair and fine stripes. Leaves alternate, petiole short or inconspicuous. Leaves narrowly lanceolate, entire or slightly serrate, with long lashes. The heads are short-stemmed and often form a cone. Total hemispherical, total sepal 2-3 layers, lanceolate, marginal membranous, ligulate flowers erect, small, white to slightly purplish, tubular flowers shorter than ray flowers. Achenes flat oblong, hairy, crown hair white. Seed breeding.
Ecological characteristics are born in the floodplain, canal, roadside or farmland, and are easy to form large communities.
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