Effect of intra-specific competition on development and growth of Alopecums myosuroides Hudson

Chauvel, Bruno; Guillemin, Jean‐Philippe; Letouzé, Anne

doi:10.1016/j.eja.2004.04.004

Cited by 12 publications

(7 citation statements)

References 19 publications

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“…A. myosuroides seeds are still contaminating turf grass and forage grass seed batches (Madiot, 2001, 2002). As A. myosuroides is very sensitive to competition (Chauvel et al ., 2004), it is, however, highly unlikely that A. myosuroides plants could successfully develop and disseminate mutant ACCase alleles from meadows. All these lines of evidence suggest that a random, non‐distance‐dependent propagation of mutant ACCase alleles is a very unlikely explanation for the spatial distribution observed.…”

Section: Discussionmentioning

confidence: 99%

Weed response to herbicides: regional‐scale distribution of herbicide resistance alleles in the grass weedAlopecurus myosuroides

et al. 2006

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Summary• Effective herbicide resistance management requires an assessment of the range of spatial dispersion of resistance genes among weed populations and identification of the vectors of this dispersion.• In the grass weed Alopecurus myosuroides (black-grass), seven alleles of the acetyl-CoA carboxylase ( ACCase ) gene are known to confer herbicide resistance. Here, we assessed their respective frequencies and spatial distribution on two nested geographical scales (the whole of France and the French administrative district of Côte d'Or) by genotyping 13 151 plants originating from 243 fields.• Genetic variation in ACCase was structured in local populations at both geographical scales. No spatial structure in the distribution of resistant ACCase alleles and no isolation by distance were detected at either geographical scale investigated.• These data, together with ACCase sequencing and data from the literature, suggest that evolution of A. myosuroides resistance to herbicides occurred at the level of the field or group of adjacent fields by multiple, independent appearances of mutant ACCase alleles that seem to have rather restricted spatial propagation. Seed transportation by farm machinery seems the most likely vector for resistance gene dispersal in A. myosuroides .

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Section: Discussionmentioning

confidence: 99%

Weed response to herbicides: regional‐scale distribution of herbicide resistance alleles in the grass weedAlopecurus myosuroides

et al. 2006

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“…This weed has a numerous tillers and, therefore, a higher coverage in the sampling time. Chauvel et al (2005) reported that in the greenhouse conditions, the number of tillers can be >100 per plant. However, growth of C. arvensis L. as a perennial weed started in spring, so at sampling time this weed has little coverage.…”

Section: Weed Species Ranking By Rdmentioning

confidence: 98%

Weed flora survey in alfalfa (Medicago sativaL.) fields of Shabestar (northwest of Iran)

Hassannejad

Ghafarbi

2013

Archives of Agronomy and Soil Science

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Alfalfa is one of the most widely grown forage crops in Iran, especially in Shabestar county. Weeds play a significant role in reducing the feeding value of alfalfa. Weed survey was done in order to determine environmental factors on weed species distribution in alfalfa fields at Shabestar, Iran (2010-2011. The family dominance index (FDI) and relative dominance (RD) were used to find dominant families and species for infestation of Shabestar's alfalfa fields. Data were analyzed by principal component analysis (PCA) and canonical correspondence analysis (CCA). A total of 130 weed species belonging to 28 families were observed. The most dominant families, based on the FDI, were Asteraceae, Poaceae, and Brassicaceae with 66.3, 61.8, and 41.1 FDI, respectively. Alopecurus myosuroides and Convolvulus arvensis were the most dominant species according to the RD index, measuring 26.4 and 21.8, respectively. PCA showed that some weed species only infested specific areas, but a few species with broader environmental tolerances were found near origin. Most variation in species distribution was explained by altitude, which was followed by soil potassium and salinity content of the soil. Our results suggest that the effect of altitude was more important than other environmental factors.

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“…Zhou et al (2005) reported similar results for the related species hairy nightshade (Solanum sarrachoides), with maximum seedling emergence up to 2 cm depth, a decrease for burial depths >2 cm, and no emergence from 8 cm depth and deeper. Seed density has also been reported as an influencing factor on the emergence and growth of many weed and crop species (Antonovics and Levin 1980;Chauvel et al 2005;Grundy et al 2003;Maddonni and Otegui 2004), including hairy nightshade (Peachey and Mallory-Smith 2007). However, there is limited knowledge about its influence on black nightshade emergence and early growth.…”

Section: Introductionmentioning

confidence: 98%

Black nightshade (Solanum nigrum) emergence and development is affected by seed density and burial depth

2011

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Black nightshade (Solanum nigrum L.) is a troublesome weed worldwide, affecting a large number of crops. As weed development is affected by a variety of factors, advanced knowledge on the plant's biological and ecological qualities can support favorable management strategies. Seed density is an ecological factor affecting emergence and early growth of many weed species. For that reason, the current study characterizes and quantifies the seed density impact on black nightshade seedling-emergence and early growth, and the interaction between seed density and burial depth on these growth parameters. Greenhouse studies conducted in 2005, 2006 and 2010 examined black nightshade seed densities of 1, 5, 10, 25 and 50 seeds per pot, buried at, 1, 2, 3, 4 and 5 cm. Impact of seed density on weed emergence and growth was characterized by number of emerged plants and leaves, followed by biomass measurements. Seed density had no impact on emergence at the tested burial depths. There was a strong logistic relationship (P<0.001, and R 2 >0.97) between time and emergence, and a strong linear relationship (P < 0.002 and R 2 > 0.86) between time and number of leaves produced in all depths and seed densities. A negative relationship was observed between seed density and plant development and growth rate. Results of this study extend the knowledge on black nightshade biology and support decision-making concerning rational weed management.

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Effect of intra-specific competition on development and growth of Alopecums myosuroides Hudson

Cited by 12 publications

References 19 publications

Weed response to herbicides: regional‐scale distribution of herbicide resistance alleles in the grass weedAlopecurus myosuroides

Weed response to herbicides: regional‐scale distribution of herbicide resistance alleles in the grass weedAlopecurus myosuroides

Weed flora survey in alfalfa (Medicago sativaL.) fields of Shabestar (northwest of Iran)

Black nightshade (Solanum nigrum) emergence and development is affected by seed density and burial depth

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