Ambrosia trifida, the giant ragweed, is a species of flowering plant in the family Asteraceae. It is native to North America, where it is widespread in Canada, the United States, and northern Mexico. [1]

三裂叶豚草（Ambrosia trifida L.）：一年生粗壮草本植物，高50-120厘米，有时可达170厘米，有分枝。 叶对生，有时互生，具叶柄，下部叶3-5裂，上部叶3裂或有时不裂，上面深绿色，背面灰绿色，两面被短糙伏毛。

Ambrosia artemisiifolia × Ambrosia trifida → Ambrosia ×‌helenae Rouleau is an extremely rare ragweed hybrid known only from CT in New England. It ismost likely to be confused with A. trifida due to the palmately or subpalmately lobed leaf blades.

三裂叶豚草（学名： Ambrosia trifida ）为菊科 豚草属下的一个种。

Flower: Slender spike-like racemes, often branched at the base, 3 to 8 inches long, at the tip of the central stem and branches. Male (staminate) flowers are yellow to greenish with no petals, about 1/8 inch across, hanging down on short stalks along the spike.

Giant ragweed Ambrosia trifida L. Family: Asteraceae (Composite family) Life cycle: Annual Native status: Native to North America Habitat: Crop fields, flood plains, field edges. General description: Erect plant up to 12 ft tall. Stems and leaves rough, …

2016年11月22日 · This datasheet on Ambrosia trifida covers Identity, Overview, Distribution, Dispersal, Hosts/Species Affected, Diagnosis, Biology & Ecology, Environmental Requirements, Natural Enemies, Impacts, Uses, Prevention/Control, Further Information.

2024年11月19日 · 三裂叶豚草（学名：Ambrosia trifida L.），菊科豚草属一年生粗壮草本。 在《中国外来入侵物种名单》中属于“第二批外来入侵物种名单”。 三裂叶豚草，高50-120厘米，有时可达170厘米，有分枝，被短糙毛，有时近无毛。

2007. Prevalence and influence of stalk-boring insects on glyphosate activity on Indiana and Michigan giant ragweed (Ambrosia trifida). Weed Technology 21:526-531. Page, E. R., and R. E. Nurse. 2015. Comparing physical, chemical, and cold stratification methods for alleviating dormancy of giant ragweed (Ambrosia trifida) seeds. Weed Technology ...

Giant Ragweed can be distinguished from other Ambrosia spp. (ragweeds) by its palmately lobed leaves; other ragweeds have leaves that are pinnatifid or bipinnatifid. The name of this genus of plants refers to ambrosia, "the food of the gods" in antiquity.

Species Name: Ambrosia trifida. Plant Type: Forb. Family Name: Asteraceae, Sunflower Family

Ambrosia trifida, the giant ragweed, is a species of flowering plant in the sunflower family. It is native to North America, where it is widespread in Canada, the United States, and northern Mexico. It is present in Europe and Asia as an introduced species, and it is known as a common weed in many regions.

2006年9月27日 · Ambrosia trifida is a ANNUAL growing to 2 m (6ft 7in) at a medium rate. It is in flower from August to October. The species is monoecious (individual flowers are either male or female, but both sexes can be found on the same plant) and is pollinated by Wind. Suitable for: light (sandy), medium (loamy) and heavy (clay) soils.

Giant Ragweed (Ambrosia trifida L.) Life cycle: Summer annual. Emerges in the spring sets seed in late summer/fall and dies. Emergence: Giant ragweed is one of the first summer annials to emerge. Ten percent emergence has been seen by 150 GDD (base 48 F). Emergence patterns vary across areas of the north central region.

Ambrosia trifida (giant ragweed) is an annual herb (family Asteraceae) with a long cluster of green-yellow flowers and opposite leaves found in the central western and southwestern areas of California. Giant ragweed has both female and male flower parts.

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