Ambrosia artemisiifolia

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Ambrosia artemisiifolia
Ambrosia artemisiifolia 1.JPG
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Asterids
Order: Asterales
Family: Asteraceae
Genus: Ambrosia
Species: A. artemisiifolia
Binomial name
Ambrosia artemisiifolia

Ambrosia elatior

Ambrosia artemisiifolia, common ragweed, is the most widespread plant of the genus Ambrosia in North America. It has also been called annual ragweed, bitterweed, blackweed, carrot weed, hay fever weed, Roman wormwood, stammerwort, stickweed, tassel weed, and American wormwood. It is native in North America. The species name, artemisiifolia, is given because the leaves were thought to bear a resemblance to the leaves of Artemisia, the true wormwoods.


Common ragweed grows to about one meter (3 feet) in height. Its wind-dispersed pollen is a strong allergen to many people with hay fever. Common Ragweed emerges in the late spring, and sets seed in later summer or fall.

Invasive species[edit]

It has become an invasive species in some European countries,[1] and in Japan, where it is known as butakusa —pig grass.[2]

Common ragweed is a very competitive weed and can produce yield losses in soybeans as high as 30%. Control with night tillage reduces emergence by around 45%. Small grains in rotation will also suppress common ragweed if they are overseeded with clover. Otherwise, the ragweed will grow and mature and produce seeds in the small grain stubble. Several herbicides are effective against common ragweed, although resistant populations are known to exist.[3]

SMARTER is a European interdisciplinary network of experts involved in the control of ragweed, health care professionals, aerobiologists, ecologists, economists, and atmospheric and agricultural modellers.[4]

The occurrence of Ophraella communa, an invasive beetle in Europe, was found south of the Alps in southern Switzerland and northern Italy. Many attacked plants completely defoliated.[5]


Ambrosia artemisiifolia is used in phytoremediation projects, removing heavy metals such as Lead from the soil.[6]


  1. ^ INRA - The common ragweed
  2. ^ Japan Wikipedia entry
  3. ^ A. Davis, K. Renner, C. Sprague, L. Dyer, D. Mutch (2005). Integrated Weed Management. MSU.
  4. ^ Cf. The project runs from 2013 to 2017 in the frame of the EU programme COST. More than 120 participants from 33 countries are participating in 2013.
  5. ^ Ophraella communa, the ragweed leaf beetle, has successfully landed in Europe: fortunate coincidence or threat? Weed Research, Volume 54, Issue 2, pages 109–119, April 2014, DOI: 10.1111/wre.12072
  6. ^

External links[edit]