Ambrosia trifida

Ambrosia trifida

Taxobox


image_caption= Giant Ragweed blooming flowers
image_width = 260px
regnum = Plantae
divisio = Magnoliophyta
classis = Magnoliopsida
ordo = Asterales
familia = Asteraceae
subfamilia = Asteroideae
tribus = Heliantheae
subtribus = Ambrosiinae
genus = "Ambrosia"
species = "A. trifida"
binomial = "Ambrosia trifida"
binomial_authority = L. (1753)Source: IPNIIPNI
id = 176138-1
date = 2008-06-08]

"Ambrosia trifida", variously called Buffalo Weed, Great Ragweed, Giant Ragweed, Bitterweed, Bloodweed, Horse Cane or, Tall Ambrosia, is an annual plant in the aster family, native throughout much of North America. Its flowers are green and are pollinated by wind rather than by insects, and the pollen is one of the main causes of late summer hay fever. Flowers are borne from midsummer through early fall.

The plant is erect, growing to 3 meters tall from clumping rootstocks.

As a Weed

Giant Ragweed is one of the most competitive weeds found in North America. At average distributions it can reduce corn crop yields by 55% and soybean yields by 52%. It is very difficult to control Giant Ragweed through mechanical means or herbicides, but it does not tolerate mowing, so planting small grains in succession is an effective way to suppress infestations.

References

* A. Davis, K. Renner, C. Sprague, L. Dyer, D. Mutch (2005). Integrated Weed Management. MSU.
* ISBN 0-89672-614-2

External links

* [http://landscaping.about.com/od/weedsdiseases/p/ragweed_allergy.htm Giant Ragweed]


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Look at other dictionaries:

  • Ambrosia trifida — Grande herbe à poux Grande herbe à poux …   Wikipédia en Français

  • Ambrosia trifida — Ragweed Rag weed (r[a^]g w[=e]d ), n. (Bot.) A common American composite weed ({Ambrosia artemisi[ae]folia}) with finely divided leaves; hogweed. [1913 Webster] {Great ragweed}, a coarse American herb ({Ambrosia trifida}), with rough three lobed… …   The Collaborative International Dictionary of English

  • Ambrosia trifida — ID 3226 Symbol Key AMTR Common Name great ragweed Family Asteraceae Category Dicot Division Magnoliophyta US Nativity Native to U.S. US/NA Plant Yes State Distribution AL, AR, AZ, CA, CO, CT, DC, DE, FL, GA, IA, ID, IL, IN, KS, KY, LA, MA, MD, ME …   USDA Plant Characteristics

  • Ambrosia trifida — noun a coarse annual with some leaves deeply and palmately three cleft or five cleft • Syn: ↑great ragweed • Hypernyms: ↑ragweed, ↑ambrosia, ↑bitterweed …   Useful english dictionary

  • Ambrosia trifida var. trifida — ID 3230 Symbol Key AMTRT2 Common Name great ragweed Family Asteraceae Category Dicot Division Magnoliophyta US Nativity Native to U.S. US/NA Plant Yes State Distribution AL, AR, AZ, CA, CO, CT, DC, DE, FL, GA, IA, ID, IL, IN, KS, KY, LA, MA, MD,… …   USDA Plant Characteristics

  • Ambrosia trifida var. texana — ID 3227 Symbol Key AMTRT Common Name Texan great ragweed Family Asteraceae Category Dicot Division Magnoliophyta US Nativity Native to U.S. US/NA Plant Yes State Distribution AZ, IL, KS, LA, MA, MO, MS, NM, OK, TX Growth Habit Subshrub, Forb/herb …   USDA Plant Characteristics

  • Ambrosia trifida L. — Symbol AMTR Common Name great ragweed Botanical Family Asteraceae …   Scientific plant list

  • Ambrosia trifida L. var. trifida — Symbol AMTRT2 Common Name great ragweed Botanical Family Asteraceae …   Scientific plant list

  • Ambrosia trifida L. var. aptera (DC.) Kuntze — Symbol AMTRT Synonym Symbol AMTRA Botanical Family Asteraceae …   Scientific plant list

  • Ambrosia trifida L. var. aptera (DC.) Kuntze — Symbol AMTRT Synonym Symbol AMTRA Botanical Family Asteraceae …   Scientific plant list

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