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秋稷Panicum dichotomiflorum是北美大陆的一种恶性杂草,它的分布范围从新斯科舍南到佛罗里达,西到加里福尼亚,在美国所有的谷物生产中心地带,均有此种杂草的分布。只是美国北方大平原的干旱地带比较少见。 (一)形态秋稷是一年生禾本科杂草,具有强大的须根系,其主茎长2～5英尺,近无毛。随着植株逐渐长高,其茎秆也渐渐倾倒,并在着地部分膨大生节,节节生根。秋稷的叶片通常无毛但有一毛状叶舌,叶片长6～18英寸,上布凸起的中脉。
Panicum dichotomiflorum is a vicious weed in the North American continent distributed from Nova Scotia to Florida and west to California, with distribution of this weed in all of the cereal production centers in the United States . Only the arid zone of the Great Plains in the northern United States is relatively rare. (A) form Autumn millet is an annual grass weeds, has a strong fibrous roots, the main stem length of 2 to 5 feet, nearly glabrous. As the plants grew taller, their stalks gradually dumped, and in the part of the expansion of Health Festival, steadily take root. The leaves of the rakkus are usually glabrous but have a hairy ligule, with leaves 6 to 18 inches long, raised midrib on the cloth.