Survey of Soybean Weeds in Mississippi

Rankins, Alfred; Byrd, John D.; Mask, Donald B.; Barnett, Jimmy W.; Gerard, Patrick D.

doi:10.1614/wt-04-197r2

Cited by 22 publications

(27 citation statements)

References 9 publications

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“…Odds ratios among these species were not significantly different (Table 8), indicating an equal chance for these species to coexist in surveyed sites. This is not surprising, because barnyardgrass, johnsongrass, and Palmer amaranth have been reported as the most trouble- (Bryson and Hanks 2006;Rankins et al 2005;Riar et al 2013a,b). Mowing and herbicides have been the predominant methods used to control roadside vegetation for decades (Berger et al 2005).…”

Section: Which Roadside Parameters Most Affect Weedmentioning

confidence: 94%

Distribution of Arable Weed Populations along Eastern Arkansas–Mississippi Delta Roadsides: Factors Affecting Weed Occurrence

et al. 2015

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The occurrence of 36 arable weed species across 13 counties in the eastern Arkansas–Mississippi Delta area on 489 randomly selected road sites was surveyed in 2012. Palmer amaranth, johnsongrass, large crabgrass, barnyardgrass, prickly sida, and broadleaf signalgrass were the top six weed species, with occurrence noted at 313, 294, 261, 238, 176, and 136 sites, respectively. Factors found to affect weed occurrence along Mississippi Delta roadsides included topographical characteristics, weed species, ditch slope, road type, and nearby land use. Among roadside topographical characteristics, road shoulder was found to strongly affect weed occurrence. In addition, paved and gravel road types with moderate roadside slope explained most of the variability of weed occurrence at each sampling site. Additionally, nearby arable land use affected weed occurrence more so than natural, residential, and pastoral land. Barnyardgrass, johnsongrass, and Palmer amaranth were 3.6 to 4.3 times more likely to occur than all other species identified. An effective weed management plan along eastern Arkansas–Mississippi Delta roadsides should focus on road shoulder, adjacent arable land use, road type, and specific weed species (e.g., Palmer amaranth, johnsongrass, and barnyardgrass). The inclusion of these parameters in future weed control programs can prove invaluable for preventing the spread of the herbicide-resistant Palmer amaranth, barnyardgrass, and johnsongrass.

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Section: Which Roadside Parameters Most Affect Weedmentioning

confidence: 94%

Distribution of Arable Weed Populations along Eastern Arkansas–Mississippi Delta Roadsides: Factors Affecting Weed Occurrence

et al. 2015

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“…Surveys are a useful method for obtaining knowledge or perception regarding a situation or issue and can assist with determining future decisions and directions (Givens et al 2009;Rankins et al 2005;Webster and MacDonald 2001). For example, a 2016 Missouri survey conducted by Bish and Bradley (2017) showed that fewer than 82% and fewer than 50% of pesticide applicators were aware that temperature and vapor pressure, respectively, influence herbicide volatilization.…”

Section: Introductionmentioning

confidence: 99%

Survey of Nebraska Farmers’ Adoption of Dicamba-Resistant Soybean Technology and Dicamba Off-Target Movement

et al. 2018

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In 2017, dicamba-resistant (DR) soybean was commercially available to farmers in the United States. In August and September of 2017, a survey of 312 farmers from 60 Nebraska soybean-producing counties was conducted during extension field days or online. The objective of this survey was to understand farmers’ adoption and perceptions regarding DR soybean technology in Nebraska. The survey contained 16 questions and was divided in three parts: (1) demographics, (2) dicamba application in DR soybean, and (3) dicamba off-target injury to sensitive soybean cultivars. According to the results, 20% of soybean hectares represented by the survey were planted to DR soybean in 2017, and this number would probably double in 2018. Sixty-five percent of survey respondents own a sprayer and apply their own herbicide programs. More than 90% of respondents who adopted DR soybean technology reported significant improvement in weed control. Nearly 60% of respondents used dicamba alone or glyphosate plus dicamba for POST weed control in DR soybean; the remaining 40% added an additional herbicide with an alternative site of action (SOA) to the POST application. All survey respondents used one of the approved dicamba formulations for application in DR soybean. Survey results indicated that late POST dicamba applications (after late June) were more likely to result in injury to non-DR soybean compared to early POST applications (e.g., May and early June) in 2017. According to respondents, off-target dicamba movement resulted both from applications in DR soybean and dicamba-based herbicides applied in corn. Although 51% of respondents noted dicamba injury on non-DR soybean, 7% of those who noted injury filed an official complaint with the Nebraska Department of Agriculture. Although DR soybean technology allowed farmers to achieve better weed control during 2017 than previous growing seasons, it is apparent that off-target movement and resistance management must be addressed to maintain the viability and effectiveness of the technology in the future.

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“…Weed surveys are critical to determine these patterns at spatial and landscape scales (Rankins et al, 2005;Korres et al, 2015a, b). Therefore, the quantitative weed data collected through surveys are of great importance for assessing factors affecting weed distribution and development of integrated weed management approaches.…”

Section: Introductionmentioning

confidence: 99%

Weed Flora of Citrus Orchards and Factors Affecting its Distribution in Western Mediterranean Region of Turkey

et al. 2018

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-Citrus is an important export commodity, mostly grown on Mediterranean and Aegean coasts of Turkey. Weeds are hidden foes impairing citrus productivity. Limited knowledge of weed distribution and factors affecting the distribution are among major hurdles in successful weed management. In this study, weed flora of citrus orchards and factors affecting its distributions in Mugla province of Turkey were determined. Sixty orchards were surveyed in spring and autumn seasons of 2010 and 2011. Data relating to frequency, coverage and density of weed species were recorded. Soil samples (0-30 cm depth) were collected and analyzed for physicochemical properties. Climatic variables, altitude and soil properties were correlated with weed flora. Sixty-eight weed species belonging to 30 families were documented. Higher number of weed species (54) was recorded in spring season compared with autumn (29 weed species). Annuals and therophytes were the most dominant growth and life forms, respectively. Canonical Correspondence Analysis (CCA) to correlate soil properties and weed vegetation data yielded three distinct groups dominated by phosphorus, sand and silt contents, which affected weed distribution. CCA to correlate vegetation data and weather attributes produced two distinct groups affected by altitude and precipitation. Generally, cosmopolitan weeds adapted to different ecosystems were observed during the survey. Keeping in view the spatial variability of soil and nature of weeds, site-specific/orchard-specific weed management practices are recommended to be opted for successful weed management.Keywords: weeds, multivariate analysis, soil properties, weather. Palavras-chave: plantas daninhas, análise multivariada, propriedades do solo, clima. RESUMO -Os citros

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Survey of Soybean Weeds in Mississippi

Cited by 22 publications

References 9 publications

Distribution of Arable Weed Populations along Eastern Arkansas–Mississippi Delta Roadsides: Factors Affecting Weed Occurrence

Distribution of Arable Weed Populations along Eastern Arkansas–Mississippi Delta Roadsides: Factors Affecting Weed Occurrence

Survey of Nebraska Farmers’ Adoption of Dicamba-Resistant Soybean Technology and Dicamba Off-Target Movement

Weed Flora of Citrus Orchards and Factors Affecting its Distribution in Western Mediterranean Region of Turkey

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