Kochia (Kochia scoparia) and Green Foxtail (Setaria viridis) Interference in Sugarbeets (Beta vulgaris)

Mesbah, Abdelouhab; Miller, Stephen D.; Fornstrom, K. James; Legg, David

doi:10.1017/s0890037x00028645

Cited by 25 publications

(39 citation statements)

References 6 publications

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“…However, percentage of sucrose was significantly higher in 2007 compared to 2006 (17.7 and 16.0%, respectively). Similar observations have been reported for kochia and green foxtail (Mesbah et al 1994), as well as wild mustard and wild oat (Mesbah et al 1995) duration of interference in sugarbeet. However, Weatherspoon and Schweizer (1969) reported a reduction in percentage of sucrose as duration of kochia competition increased.…”

Section: Resultssupporting

confidence: 88%

“…], green foxtail [Setaria viridis (L.) Beauv.] (Mesbah et al 1994), wild mustard (Sinapis arvensis L.), and wild oat (Avena fatua L.) (Mesbah et al 1995) had no effect on percentage of sucrose content of sugarbeet. However, Schweizer and Bridge (1982) reported reduction in percentage of sucrose with increasing densities of velvetleaf (Abutilon theophrasti Medik.)…”

Section: Resultsmentioning

confidence: 93%

“…Similarly, Weerakoon and Lovett (1986c) reported that lanceleaf sage plants became much smaller and with poor competitive ability as wheat density increased. In contrast, several studies have evaluated the relationship between the density of various weeds and sugarbeet and reported yield losses of up to 73% (Mesbah et al 1994(Mesbah et al , 1995Schweizer 1981Schweizer , 1983Schweizer and Bridge 1982;Schweizer and Lauridson 1985).…”

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confidence: 99%

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Lanceleaf Sage (Salvia reflexa) Interference in Sugarbeet

et al. 2010

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Field studies were conducted in Powell, WY, in 2006 and 2007 to determine the influence of season-long interference of various lanceleaf sage densities and durations of interference on sugarbeet. The rectangular hyperbola model with the asymptote (A) constrained to 100% maximum yield loss characterized the relationship between lanceleaf sage density and sugarbeet yield loss. The estimated parameterI(yield loss per unit weed density as density approaches zero) was 3% for both root and sucrose yield loss. Increasing duration of lanceleaf sage interference had a negative effect on sugarbeet root yield. The critical timing of weed removal to avoid 5 and 10% root yield loss was 37 and 52 d after sugarbeet emergence, respectively. Lanceleaf sage interference did not affect percentage of sucrose content. These results indicate that lanceleaf sage is not as competitive as other weeds but that appropriate control measures should be undertaken to minimize sugarbeet yield loss from interference.

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Section: Resultssupporting

confidence: 88%

Section: Resultsmentioning

confidence: 93%

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confidence: 99%

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Lanceleaf Sage (Salvia reflexa) Interference in Sugarbeet

et al. 2010

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“…(1 of crop row reduced sugarbeet root yield by 18% (Mesbah et al 1994). In a study in Colorado, 0.5 kochia plants m…”

Section: Description and Account Of Variationmentioning

confidence: 96%

The biology of Canadian weeds. 138. Kochia scoparia (L.) Schrad.

Friesen¹,

Beckie²,

Warwick³

et al. 2009

Can. J. Plant Sci.

111

164

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Kochia [Kochia scoparia (L.) Schrad.] is an annual broadleaf weed species native to Eurasia and introduced as an ornamental to the Americas by immigrants in the mid- to late 1800s. Although sometimes categorized in the genus Bassia, there is no compelling reason for this classification. This naturalized species is a common and economically important weed in crop production systems and ruderal areas in semiarid to arid regions of North America, and has expanded northward in the Canadian Prairies during the past 30 yr. Although primarily self-pollinated, substantial pollen-mediated gene flow and efficient seed dispersal aids both short- and long-distance spread. The weed is morphologically highly variable, and its growth and development are markedly affected by environmental conditions. Kochia, a C4 species, is highly competitive in cropping systems because of its ability to germinate at low soil temperatures and emerge early, grow rapidly, tolerate heat, drought and salinity, and exert allelopathic effects on neighboring species. Moreover, herbicidal control has been compromised to some extent by the widespread evolution of herbicide resistance in the species. Kochia is used as a forage, is palatable to livestock with nutritional value similar to that of alfalfa (Medicago sativa), but can be toxic if it comprises the majority of the diet. Although kochia pollen is an allergen, the seed is a source of phytochemicals including mosquito pheromones and saponins that are potentially beneficial to human health; kochia also is beneficial in phytoremediation of soils contaminated by hydrocarbons or pesticides. Key words: Kochia, Kochia scoparia, Bassia scoparia, herbicide resistance, soil salinity tolerance, weed biology

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“…In Wyoming, K . scoparia densities as low as 0.2 plants m -1 of crop row reduced sugarbeet root yield by 18% [5]. The outcrossing nature of K .…”

Section: Introductionmentioning

confidence: 99%

EPSPS Gene Copy Number and Whole-Plant Glyphosate Resistance Level in Kochia scoparia

Gaines¹,

Barker²,

Patterson³

et al. 2016

PLoS ONE

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Glyphosate-resistant (GR) Kochia scoparia has evolved in dryland chemical fallow systems throughout North America and the mechanism of resistance involves 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) gene duplication. Agricultural fields in four states were surveyed for K. scoparia in 2013 and tested for glyphosate-resistance level and EPSPS gene copy number. Glyphosate resistance was confirmed in K. scoparia populations collected from sugarbeet fields in Colorado, Wyoming, and Nebraska, and Montana. Glyphosate resistance was also confirmed in K. scoparia accessions collected from wheat-fallow fields in Montana. All GR samples had increased EPSPS gene copy number, with median population values up to 11 from sugarbeet fields and up to 13 in Montana wheat-fallow fields. The results indicate that glyphosate susceptibility can be accurately diagnosed using EPSPS gene copy number.

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Kochia (Kochia scoparia) and Green Foxtail (Setaria viridis) Interference in Sugarbeets (Beta vulgaris)

Cited by 25 publications

References 6 publications

Lanceleaf Sage (Salvia reflexa) Interference in Sugarbeet

Lanceleaf Sage (Salvia reflexa) Interference in Sugarbeet

The biology of Canadian weeds. 138. Kochia scoparia (L.) Schrad.

EPSPS Gene Copy Number and Whole-Plant Glyphosate Resistance Level in Kochia scoparia

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