Ragweeds (<i>Ambrosia</i>spp.)—The Hay Fever Weeds

Mitich, Larry W.

doi:10.1017/s0890037x00045966

Cited by 14 publications

(16 citation statements)

References 11 publications

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“…1132 kg ha -1 dry weight according to Bovey et al (1966). It has been estimated that the establishment of a "competitive" root system takes one year; after the emergence of a seedling from one of the few mature seeds, a shoot emerges from the root during the second year and in only one season it can colonize an area of 2 m 2 (Basset and Crompton, 1975;Mitich, 1996). Reece et al (2004) demonstrated that A. psilostachya can maintain primordia for several years even with limited plant growth, and Wan et al (2002) showed that clipping stimulates the growth of new stems.…”

Section: Resiliencementioning

confidence: 99%

The Worldwide Spread, Success, and Impact of Ragweed (Ambrosiaspp.)

Montagnani

Gentili

Smith

et al. 2017

Critical Reviews in Plant Sciences

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Ambrosia species represent one of the most problematic groups of invasive weeds around the world. The ease they are introduced and spread in new countries, their generalist ecological requirements and functional traits facilitate their invasion and subsequent naturalization in new areas. All of these aspects contribute to increasing their global social and economic impact, which is mostly related to pollen allergy. Here we analyse available scientific publications about Ambrosia artemisiifolia, A. psilostachya, A. tenuifolia and A. trifida, with the aim of defining the current level of knowledge and summarizing important data that is currently scattered throughout the literature. Specifically, we analysed the following: (1) their current global distribution and current stage of invasion; (2) traits and requirements promoting their introduction, reproductive success and adaptation to climate and environment in the non-native range; as well as (3) current knowledge about allergens and elements increasing their impact.

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Section: Resiliencementioning

confidence: 99%

The Worldwide Spread, Success, and Impact of Ragweed (Ambrosiaspp.)

Montagnani

Gentili

Smith

et al. 2017

Critical Reviews in Plant Sciences

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“…Common ragweed (Ambrosia artemisiifolia L.) is an erect annual, monoecious broadleaf within the aster family and native to North America, but is also found in Europe, Asia and South America (Mitich 1996;Lanini and Wertz 2013). Common ragweed flourishes in cultivated fields, along roadsides and in open disturbed habitats.…”

mentioning

confidence: 99%

“…Common ragweed flourishes in cultivated fields, along roadsides and in open disturbed habitats. It is generally not found in pastures and lawns, as it prefers areas where there is little competition during early growth (Mitich 1996). The seed must go through a dormancy period of low soil temperatures before it can germinate (Jordan et al 2013).…”

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confidence: 99%

Glyphosate and acetolactate synthase inhibitor resistant common ragweed (Ambrosia artemisiifolia L.) in southwestern Ontario

et al. 2015

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. 2015. Glyphosate and acetolactate synthase inhibitor resistant common ragweed (Ambrosia artemisiifolia L.) in southwestern Ontario. Can. J. Plant Sci. 95: 335Á338. Common ragweed (Ambrosia artemisiifolia L.) was found to be resistant to glyphosate in Ontario. Field surveys were conducted from 2011 to 2013 to determine the distribution of glyphosate-resistant (GR) and acetolactate synthase inhibitor resistant common ragweed. GR common ragweed was confirmed in Essex County. All GR populations were found to be resistant to acetolactate synthase-inhibiting herbicides.

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“…1999; Ziska 2001). In North America, ragweed pollen is known as one of the main causes of hay fever (allergic rhinitis) (Mitich 1996) or a form of dermatitis in some persons.…”

mentioning

confidence: 99%

Common ragweed (Ambrosia artemisiifolia) dry matter allocation and partitioning under different nitrogen and density levels

Leskovšek

Datta

Knežević

et al. 2012

Weed Biology and Management

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Dry matter partitioning and allocation is a major determinant of plant growth and its competitiveness. Common ragweed (Ambrosia artemisiifolia) is a troublesome agronomic weed species and it is also a major health concern in Europe and many other countries because of its rapid spreading and production of allergenic pollen. A field experiment was conducted in 2009 to determine the effect of nitrogen fertilizer levels (0, 100, and 200 kg ha -1 ) and plant density levels (1.3, 6.6, and 13.2 plants per m 2 ) on the leaf, stem dry matter partitioning, and dry matter allocation of ragweed.With an increasing density, the stem partitioning coefficient increased, whereas the leaf partitioning coefficient decreased. The addition of nitrogen had a limited effect on the leaf and stem dry matter partitioning. The root dry matter production decreased with an increasing density and was not influenced by the addition of nitrogen. Under intraspecific competition, ragweed exhibited a stronger above-ground competition intensity than below the ground, which resulted in a greater root : shoot ratio, compared to the low-density stands.The level of nitrogen influenced the vertical leaf, stem, and total dry matter distribution, with a greater allocation to the top stratum of the plants, thus increasing their competition for light. The biomass allocation of ragweed to the roots in response to the nitrogen supply exhibited a low plasticity, compared to the shoots, which displayed a high plasticity. The results of this study suggested that, under intraspecific conditions and with an increasing nitrogen supply, ragweed would be more competitive in above-ground resource acquisition.

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Ragweeds (Ambrosiaspp.)—The Hay Fever Weeds

Abstract: “Wither'd hogs … on ragweed nags, They skim the muirs [moors].”Address to the Diel, 1785, Scottish poet Robert Burns (1759–1796).

Cited by 14 publications

References 11 publications

The Worldwide Spread, Success, and Impact of Ragweed (Ambrosiaspp.)

The Worldwide Spread, Success, and Impact of Ragweed (Ambrosiaspp.)

Glyphosate and acetolactate synthase inhibitor resistant common ragweed (Ambrosia artemisiifolia L.) in southwestern Ontario

Common ragweed (Ambrosia artemisiifolia) dry matter allocation and partitioning under different nitrogen and density levels

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