Weed communities of transgenic glyphosate‐tolerant soyabean crops in ex‐pasture land in the southern Mesopotamic Pampas of Argentina

Mas, M. T.; Verdú, A. M. C.; Kruk, Betina Claudia; Abelleyra, Diego de; Guglielmini, Antonio C.; Satorre, Emilio H.

doi:10.1111/j.1365-3180.2010.00785.x

Cited by 18 publications

(22 citation statements)

References 23 publications

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“…(green bristle grass) were the most strongly associated with preceding crop maize, while P. aviculare and C. album preferred other preceding crops. According to Mas et al. (2010), maize as a previous crop also affected weed community structure in soyabean.…”

Section: Discussionmentioning

confidence: 99%

Weed vegetation of poppy (Papaver somniferum) fields in Hungary: effects of management and environmental factors on species composition

et al. 2011

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Pinke G, Pál RW, Tóth K, Karácsony P, Czúcz B & Botta‐Dukát Z (2011). Weed vegetation of poppy (Papaver somniferum) fields in Hungary: effects of management and environmental factors on species composition. Weed Research51, 621–630. Summary Poppy (Papaver somniferum) is a sporadically cultivated crop species, with idiosyncratic life history traits, management systems and highly specific and under‐researched weed communities. This study aimed to assess the management and environmental factors determining the weed species composition of poppy fields over a relatively large area (Hungary in central‐eastern Europe), one of the focal regions of poppy production worldwide. The abundance of weed flora was measured in 102 poppy fields across Hungary, along with 41 management and environmental factors. The set of explanatory variables was reduced by stepwise backward selection to a minimal adequate model containing 15 terms, which explained 34.3% of the total variation in species data. The net effects of 10 variables on species composition were significant. Sowing season was found to be the most important explanatory variable, showing a clear distinction between the weed flora of autumn‐sown food poppy and spring‐sown alkaloid poppy fields. Other management factors, such as preceding crop, herbicides mesotrione and isoxaflutole, fertiliser N and row spacing, were also significant. Only four environmental variables (temperature, soil texture, soil Mg and Ca content) were significant, which can be attributed to the narrow ecological tolerance of poppy, resulting in short environmental gradients.

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Section: Discussionmentioning

confidence: 99%

Weed vegetation of poppy (Papaver somniferum) fields in Hungary: effects of management and environmental factors on species composition

et al. 2011

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“…These two species can certainly replenish the soil seed banks before stubble ploughing, triggering greater infestations in the subsequent crops. Maize as a previous crop led to an increased proportion of spring germinating weeds in oilseed rape (Hanzlik and Gerowitt 2011), and according to Mas et al (2010), a preceding maize crop also affected weed community structure in soybean. Subbulakshmi et al (2009) also reported significant changes in weed species composition in a maize and sunflower cropping system as a consequence of crop rotation.…”

Section: Preceding Crop and Field Sizementioning

confidence: 99%

Relating Ambrosia artemisiifolia and other weeds to the management of Hungarian sunflower crops

et al. 2013

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The weed control of sunflower is a 'great challenge' for farmers throughout the World. The main goal of this study is to identify management and environmental factors which determine the weed species composition of sunflower fields. Altogether 49 sunflower fields across Hungary were surveyed for their weed flora, and 11 environmental and 19 management factors (including the use of mechanical weed control and 6 herbicide treatments) were also recorded for the same fields. Using stepwise backward selection this set of predictors was reduced to a minimal adequate model containing 14 terms explaining 37.8% of the total variation in species data. The net effects of 5 variables on species composition were significant, these were soil Mg and Ca content, preceding crop, temperature, and field size. We also performed exploratory forward/backward model selection to reveal influential predictors for several predetermined species groups and individual species. Most of the herbicides appeared to be effective against annual grass species, but no herbicide was universally effective against broad-leaved weeds. Almost all types of weeds were efficiently reduced with mechanical weed control. We obtained a relatively high share of environmental factors in the variation of species composition, which suggests that the success of agrotechnical treatments in sunflower fields strongly depends on a complex of edaphic and climatic constraints. The abundance of the most troublesome weed, Ambrosia artemisiifolia was positively correlated with high soil Ca content, lower temperature, preceding crop cereal, and lower field sizes, while it seemed to be most sensitive to fluorchloridon and propisochlor application.2

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“…Large crabgrass (Digitaria sanguinalis) is another species of this genus grown in the Caucasus and Kashmir as a cereal in the past century, but currently known as a widely distributed summer annual weed (de Wet, 1992), even in the glyphosate-tolerant summer crops (e.g. Puricelli & Tuesca, 2005;Dewar, 2009;Mas et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Within‐population variation in resistance of Digitaria sanguinalis to Ustilago syntherismae resulting from different modes of seed germination and environment

Mas

Verdú

2013

Plant Pathology

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In annual plants affected by inflorescence-invading smut pathogens, avoidance of infection is crucial, while in the event of infection, the existence of different degrees of tolerance could also affect the interaction dynamics. Two experiments were performed with Digitaria sanguinalis spikelets vacuum inoculated with ustilospores of Ustilago syntherismae. In the first experiment, they were sown in pots and mature plants were checked to detect internal hyphae. Observations revealed the presence of symptomless mycelium in a few plants. In the second experiment the spikelets, from two different lots, were grown in a chamber. The objective was to explore the importance of two factors in the degree of seedling infection, one genotypic -type of germination (TG; radicular or coleoptilar) and one environmental -48 h dark treatment (DT) applied just after germination. Analysis of the infection frequency showed that all the main effects (seed lot origin, TG and DT) were significant, while interactions were not. For TG, the estimated least square mean infection percentages were 66% for radicular germination and 46% for coleoptilar germination. Darkness increased seedling infection by 25%. Differences between TG, DT and their relationship with mesocotyl length exposed to the germinating spores are discussed.

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Weed communities of transgenic glyphosate‐tolerant soyabean crops in ex‐pasture land in the southern Mesopotamic Pampas of Argentina

Abstract: Postprint (published version

Cited by 18 publications

References 23 publications

Weed vegetation of poppy (Papaver somniferum) fields in Hungary: effects of management and environmental factors on species composition

Weed vegetation of poppy (Papaver somniferum) fields in Hungary: effects of management and environmental factors on species composition

Relating Ambrosia artemisiifolia and other weeds to the management of Hungarian sunflower crops

Within‐population variation in resistance of Digitaria sanguinalis to Ustilago syntherismae resulting from different modes of seed germination and environment

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