An Approach to Estimating Yield Loss of Barley Due to Canada Thistle

O’Sullivan, P. A.; Kossatz, V. C.; Weiss, G. M.; Dew, D. A.

doi:10.4141/cjps82-105

Cited by 52 publications

(45 citation statements)

References 2 publications

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“…Overall, the empirical strengths (i.e., r 2 ) of the yield loss relationships in this study were lower than that reported for annual cropland by O'Sullivan et al (1982O'Sullivan et al ( , 1985 and Moyer et al (1991) in Alberta. However, the forementioned studies were conducted within cultivated, (NS) or significantly different at P Ͻ 0.10 (*), P Ͻ 0.05 (**), or P Ͻ 0.01 (***).…”

Section: Resultscontrasting

confidence: 78%

Herbage Yield Losses in Perennial Pasture Due to Canada Thistle (Cirsium arvense)

Grekul

Bork

2004

Weed technol.

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Although the impact of Canada thistle (CT) on annual crop production is relatively well established, few investigations report on this weed's impact within perennial pastures. This field study assessed herbage yield losses within eight central Alberta pastures from 1999 to 2001. Each pasture was sampled in 1999 to quantify thistle and herbage biomass within 25 permanent plots. CT was controlled in 2000 and the response of vegetation measured in 2000 and 2001. Before removal, significant negative relationships (P < 0.05) between thistle abundance and herbage were noted at six sites. After thistle removal, herbage at several sites displayed positive responses. Both thistle density and biomass adequately predicted herbage yield loss. Yield losses due to CT can be substantial, peaking at 2 kg/ha for each kilogram of standing thistle biomass and 4.3 kg/ha with each additional thistle stem per square meter. Demonstrated yield losses were variable among sites however, likely due to factors such as heterogeneity in soils, available moisture, and variation in disturbance history or pasture vegetation composition. CT management in perennial pastures of western Canada may enhance pasture production, but further research is required to reliably predict the ability of pastures to respond.

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Section: Resultscontrasting

confidence: 78%

Herbage Yield Losses in Perennial Pasture Due to Canada Thistle (Cirsium arvense)

Grekul

Bork

2004

Weed technol.

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“…In 1994 and 1996, Canada thistle dry weight tended to be higher in the barley/canola than the canola/barley rotation. This was most evident where no in-crop herbicide was applied, and was likely due to the superior competitiveness of barley compared with canola (O'Sullivan et al 1982(O'Sullivan et al , 1985.…”

Section: In-crop Herbicide Applicationmentioning

confidence: 95%

“…Root expansion has been estimated at 1 cm d -1 , reaching a depth of 1.8 m in 2 yr (Nadeau and Vanden Born 1989). Yield losses due to Canada thistle in barley and canola have been shown to be considerably higher than those caused by equivalent densities of wild oat (Avena fatua L.) (O'Sullivan et al 1982;O'Sullivan et al 1985).…”

mentioning

confidence: 99%

Canada thistle (Cirsium arvense) management in canola (Brassica rapa) and barley (Hordem vulgare) rotations under zero tillage

O’Donovan¹,

Blackshaw²,

Harker³

et al. 2001

Can. J. Plant Sci.

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[183][184][185][186][187][188][189][190]. The effect of in-crop herbicide rate, crop row spacing and seeding rate on Canada thistle [Cirsium arvense (L.) Scop.] management in two cycles of a canola (Brassica rapa L.)/barley (Hordeum vulgare L.) rotation was investigated under zero tillage at Vegreville, Alberta. The entire plot area received pre-harvest glyphosate from 1993 through 1995. In crop, either no herbicides were applied or clopyralid and dicamba/MCPA-K were applied at one-half or full recommended rates to canola and barley, respectively. In most cases, Canada thistle shoot density and dry weight were lower when the herbicides were used at either rate compared with no herbicide application. Pre-harvest glyphosate followed by either clopyralid or dicamba/MCPA-K in-crop reduced Canada thistle shoot densities from approximately 20 m -2 in 1993 to one or fewer m -2 in 1996. In-crop herbicides resulted in higher crop yields and revenues in 1993 and 1994, but not in 1996 when the Canada thistle infestation was relatively low. The effect of crop row spacing was inconsistent, and had little effect on Canada thistle shoot density or dry weight. In some cases, crop yield was higher at 20-cm than at 30-cm row spacing. Crop seeding rate had no effect on crop or Canada thistle variables.

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“…1977, Damanakis 1984). It is recognized as a very competitive weed (Hodgson 1968, O’Sullivan et al. 1982, O’Sullivan et al.…”

Section: Introductionmentioning

confidence: 99%

Competition between Canada Thistle [Cirsium arvense (L.) Scop.] and Faba Bean (Vicia faba L.)

Kalburtji

Mamolos

2001

J Agronomy Crop Science

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This study was conducted to investigate whether density, above‐ground biomass and nitrogen (N) concentration of Cirsium arvense (L.) Scop. cause serious reductions in faba bean (Vicia faba L.) yield. A 2‐year field experiment (1991–93) with four Cirsium densities (0, 4, 16, 64 plants m–2) was carried out. Statistical analysis showed a significant effect of Cirsium density on faba bean yield. Multiple regression analysis showed that the main factors causing faba bean yield losses were the density and above‐ground biomass of Cirsium. The results of this study demonstrate that Cirsium competition reduces faba bean yield. The mean faba bean yield losses over the 2 years were 10, 12 and 8% for above‐ground biomass, seed and stem, respectively, for a Cirsium density of 16 plants m–2.

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An Approach to Estimating Yield Loss of Barley Due to Canada Thistle

Abstract: Research Stution, A,qriculture Cunudu, Lucombe, Alberta T)C 150. Contribution ntt.423, reteivetl I0 Apr. l9Bl, uctepred 23 Feb. 1982. O'Sur-r-rvnN, P. A., Kossrrz,V. C., Wtrss

Cited by 52 publications

References 2 publications

Herbage Yield Losses in Perennial Pasture Due to Canada Thistle (Cirsium arvense)

Herbage Yield Losses in Perennial Pasture Due to Canada Thistle (Cirsium arvense)

Canada thistle (Cirsium arvense) management in canola (Brassica rapa) and barley (Hordem vulgare) rotations under zero tillage

Competition between Canada Thistle [Cirsium arvense (L.) Scop.] and Faba Bean (Vicia faba L.)

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