THE BIOLOGY OF CANADIAN WEEDS.: 11. Ambrosia artemisiifolia L. and A. psilostachya DC.

Bassett, I. J.; Crompton, C. W.

doi:10.4141/cjps75-072

Cited by 242 publications

(285 citation statements)

References 2 publications

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“…Observations done in another area in southern Quebec where ragweed is widespread, also suggested that ragweed was more abundant along roadsides than in other rural settings (Comtois 1995 surveyed field entrances in the Saint-Jean-sur-Richelieu area located away from major axes of transport. Along these often private farm roads lower disturbance, light intensity and use of de-icing salt potentially lead to lower ragweed abundance (Basset and Crompton 1975;DiTommaso 2004). Weeds that are more associated with fields than roadsides, but can be found along roadsides, specifically Amaranthus species (Costea et al 2004), were not observed along rural roadsides, even in the area closest to the field entrances.…”

Section: Discussion Fields Field Borders and Roadsidesmentioning

confidence: 97%

“…Field borders were generally composed of graminoid species [probably mostly perennial grasses like Bromus inermis (deBlois et al 2002)], perennial and biennial species. An increase in perennial cover and a reduction in disturbance reduce ragweed abundance (Gebben 1965;Basset and Crompton 1975;Maryushkina 1991;DiTommaso and Massicotte 2002). This explains the low ragweed abundance in field borders relative to fields where herbicides are applied.…”

Section: Discussion Fields Field Borders and Roadsidesmentioning

confidence: 99%

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Distribution and abundance of an allergenic weed, common ragweed (Ambrosia artemisiifolia L.), in rural settings of southern Quebec, Canada

Simard¹,

Benoit²

2010

Can. J. Plant Sci.

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. 2010. Distribution and abundance of an allergenic weed, common ragweed (Ambrosia artemisiifolia L.), in rural settings of southern Que´bec, Canada. Can. J. Plant Sci. 90: 549{557. Common ragweed (Ambrosia artemisiifolia L.) is an important weed of urban and rural settings in eastern Canada. Where the species is abundant, its wind-dispersed pollen is responsible for most cases of allergic rhinitis or ''hayfever'' in August and September. Despite its adverse health effects, there is little information on the actual abundance or distribution of ragweed plants in rural settings. Ragweed surveys were therefore done in July and August (after herbicide application) in corn and soybean fields, field borders and along rural roadsides surrounding two cities in southern Quebec. Based on zero-inflated Poisson regression models, ragweed density averaged 4.1 plants m (2 (Saint-Jean-sur-Richelieu area) and 16.1 plants m (2 (Salaberryde-Valleyfield area) along roadsides. Ragweed density in field borders (1.3 plants m (2 ) and fields was lower than on roadsides. Conventionally tilled fields and fields where tillage was reduced had equivalent densities of ragweed. Ragweed abundance in fields was likely related to the efficacy of herbicides used in transgenic vs. conventional crops. Transgenic herbicide-resistant corn fields had higher ragweed densities than conventional fields (0.44 vs. 0.07 plants m ). Field borders located closer to roadsides had slightly higher ragweed counts, while roadside densities did not depend on the proximity of a field entrance. This suggests that roadsides are currently potential sources of spread into fields more than the opposite. Further research on the pollen production and dispersal of these rural populations is needed. ).Une le´ge`re augmentation du nombre de plants d'herbe a`poux en bordure de champ e´tait associe´e a`la proximite´d'une route alors que la densite´de l'herbe a`poux le long de la route ne de´pendait pas de la proximite´d'une entre´e de champ. Ceci sugge`re que les bords de route sont actuellement les foyers potentiels de propagation dans les champs plus que l'inverse. Des travaux permettant d'e´valuer la production et la dispersion de pollen des populations rurales d'herbe a`poux seraient ne´cessaires.

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Section: Discussion Fields Field Borders and Roadsidesmentioning

confidence: 97%

Section: Discussion Fields Field Borders and Roadsidesmentioning

confidence: 99%

Distribution and abundance of an allergenic weed, common ragweed (Ambrosia artemisiifolia L.), in rural settings of southern Quebec, Canada

Simard¹,

Benoit²

2010

Can. J. Plant Sci.

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“…On undisturbed soil, the annual seed production of ragweed germinates to high percentages in early next spring (Dickerson 1968, Bassett and Crompton 1975, Fumanal et al 2008, Kazinczi et al 2008. Soil tillage incorporates new seeds into deeper layers of the soil (Buhler et al 1997) and promotes long time persistency of ragweed seeds (Toole and Brown 1946).…”

Section: Introductionmentioning

confidence: 99%

The influence of mowing regime on the soil seed bank of the invasive plant Ambrosia artemisiifolia L.

Milakovic¹,

Karrer²

2016

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Citation: Milakovic I, Karrer G (2016) The influence of mowing regime on the soil seed bank of the invasive plant Ambrosia artemisiifolia L. NeoBiota 28: 39-49. doi: 10.3897/neobiota.28.6838 Abstract Ambrosia artemisiifolia is an invasive annual herb infamous for the high allergenicity of its pollen, which is related to increasing medical costs. Additionally, it can cause serious yield losses as agricultural weed. Common ragweed seeds accumulate in the soil and can remain therein viable for decades, which poses a problem for the sustainable management of these populations. A long term management should thus target a reduction of the soil seed bank. We observed the influence of four different mowing regimes on the ragweed soil seed bank at six roadside populations in eastern Austria. The mowing regimes were based on methods from common roadside management practice and specifically adapted to reduce seed production. After three years of application, the soil seed bank was indeed reduced by 45 to 80 percent through three of the four mowing regimes tested. Therefore, we suggest that the best mowing regime for the most effective reduction of the size of the soil seed bank is the one consisting of one cut just after the beginning of female flowering (around the 3 rd week of August in Eastern Central Europe), followed by a second cut 2-3 weeks later.

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“…Thereby the normal succession of vegetation can be impeded or disturbed by the invasion of S. ciliatum, as has been shown for other adventive plants in long term experiments with permanent plots [74,75]. After cessation of the disturbing factors the abundance and dominance of S. ciliatum will decrease markedly, as for other herbaceous invasive therophytes [74,76,77] and, on wet and salty fields, by increasing the share of perennial species the analysed phytocoenoses may evolve into more stable halophilous communities, such as Astero tripoli-Juncetum gerardii, widespread in the study area [7] or in other similar communities from the class Festuco-Puccinellietea.…”

Section: Syndynamic Aspectsmentioning

confidence: 99%

Symphyotrichum ciliatum in Romania: trends of spread and invaded plant communities

et al. 2015

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Symphyotrichum ciliatum was reported as invasive in Romania in the early 1970s. In this study we have analysed its invasion history, current distribution in Romania, habitat preferences and the associated plant communities. Data recorded during our recent field work, as well as from herbaria and previously published papers, were used in the analysis. This data confirms its invasive character. Given the abrupt increase in the slope of the invasion curve during the last decade, we can assume that S. ciliatum is still far from reaching the saturation phase of its invasion in Romania. Habitats invaded by this species are mostly anthropogenic herb stands associated with rail and road transport networks, and the continental inland salt steppes. The classical methodology of the Zürich- Montpellier school was used for the field phytosociological research and the classification of the investigated communities was done using the deductive method. The phytocoenoses dominated by S. ciliatum were classified as derivate communities. The description of these communities included data about plant composition, synecology and distribution in the study area.

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THE BIOLOGY OF CANADIAN WEEDS.: 11. Ambrosia artemisiifolia L. and A. psilostachya DC.

Abstract: This account of Ambrosia artemisiifolia L. (common ragweed)

Cited by 242 publications

References 2 publications

Distribution and abundance of an allergenic weed, common ragweed (Ambrosia artemisiifolia L.), in rural settings of southern Quebec, Canada

Distribution and abundance of an allergenic weed, common ragweed (Ambrosia artemisiifolia L.), in rural settings of southern Quebec, Canada

The influence of mowing regime on the soil seed bank of the invasive plant Ambrosia artemisiifolia L.

Symphyotrichum ciliatum in Romania: trends of spread and invaded plant communities

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