Commercial generations of Brassica napus cause greater yield loss in Triticum aestivum, than volunteer B. napus generations

Seerey, Nicole J.; Shirtliffe, Steven J.

doi:10.4141/cjps09187

Cited by 5 publications

(6 citation statements)

References 16 publications

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“…In pot trials, the percentage range was even wider, at 0.38 to 11.93%. Previous research obtained comparable data of 0.15-0.6% yield loss per SOSR plant in SW (Seerey & Shirtliffe 2010), 0.24-2.4% yield loss at low SOSR densities in SW (O'Donovan et al 2008) and approximately 1% yield loss per WOSR plant in WW (Brain et al 1999). However, low r-values of the applied regression (e.g., 0.49; SW × SOSR) show the high variation of yield data.…”

Section: Discussionsupporting

confidence: 59%

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Competitiveness and yield impact of volunteer oilseed rape (Brassica napus) in winter and spring wheat (Triticum aestivum)

Krato

Petersen

2012

J Plant Dis Prot

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Volunteer oilseed rape is a relevant weed in many crop rotations due to seed persistence and dormancy. With the introduction of imidazolinone-tolerant oilseed rape varieties in Europe, herbicide-based control strategies of volunteers in cereals may become ineffective in the future. Experiments were conducted on experimental fields and in outdoor pots in Bingen (Germany) to quantify the effect of oilseed rape volunteers on yield and quality parameters of wheat. To simulate competition, oilseed rape was sown into wheat plots at a range of 2 to 320 plants m -2 . Both spring and winter varieties of oilseed rape and wheat were used in the experiments. Crop yield parameter were expressed as the number of heads m -2 , net yield as kg ha -1 and hectolitre -1 weight. Wheat moisture content, percentage of dockage, wheat thousand-kernel weight, and crude protein content were determined. Significant negative correlations were detected between the yield parameters heads m -2 and yield on the one hand, and oilseed rape density on the other hand. Moisture content of wheat and percentage of dockage were positively correlated with the volunteer density. No clear correlation was found between volunteer oilseed rape density and thousand-kernel weight, hectolitre weight and crude protein content of wheat. The highest volunteer density of 261 plants m -2 caused a maximum yield loss of 68% in winter wheat. Based on a non-linear regression analysis, a single volunteer oilseed rape plant m -2 is able to cause a yield loss of 0.74 to 1.61% in the field, which corresponds to 26.3 kg ha -1 (spring oilseed rape in spring wheat (SOSR × SW)) and 147.3 kg ha -1 (winter oilseed rape in winter wheat (WOSR × WW)), respectively. However, the introduction of imidazolinone-tolerant oilseed rape varieties will challenge farmers in terms of volunteer management. Control of volunteers is important to reduce yield losses. Accurate, delayed tillage after oilseed rape harvest and control of imidazolinone-tolerant volunteers with herbicides with other modes of action than those grouped into HRAC B will contribute to the successful avoidance and removal of imidazolinone-tolerant volunteers from subsequent crops.

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Section: Discussionsupporting

confidence: 59%

“…The competitiveness of volunteer oilseed rape in crop rotations has been studied in the past (Kim et al 2002, O'Donovan et al 2008, Seerey & Shirtliffe 2010. The outcome of competition between crop and weed determines the economic necessity of a herbicide application.…”

Section: Introductionmentioning

confidence: 99%

Competitiveness and yield impact of volunteer oilseed rape (Brassica napus) in winter and spring wheat (Triticum aestivum)

Krato

Petersen

2012

J Plant Dis Prot

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“…Following recruitment in May or June, volunteer B. napus grows rapidly and interferes with neighboring plants, resulting in crop yield loss (Gregoire 2017; Seerey and Shirtliffe 2010). Canola plants exhibit high phenotypic plasticity (Gregoire 2017), efficient resource uptake (Blackshaw et al 2003) and can adapt rapidly to their immediate environment.…”

Section: Introductionmentioning

confidence: 99%

Candidate Tools for Integrated Weed Management in Soybean at the Northern Frontier of Production

Geddes

Gulden

2018

Weed Sci

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The development of early-maturing soybean [Glycine max(L.) Merr.] varieties has led to an increase in soybean production in canola (Brassica napusL.)-dominant crop rotations in western Canada. Herbicide-resistant (HR) volunteerB. napuscan be difficult to manage in HR soybean using herbicides alone. In 2013 and 2014, four field experiments were conducted in Manitoba, Canada, to evaluate soybean row spacing, seeding density, nitrogen supply, and interrow tillage as candidate nonchemical weed management tools for an integrated program to manage volunteerB. napusin soybean. Among treatments and sites, volunteerB. napusproduced about 830 seeds plant−1and resulted in large seedbank inputs (averaging about 20,300 seeds m−2). VolunteerB. napusseedling recruitment differed among sites, and resulted in two distinct classes of sites based on average seedling densities of 39 and 89 plants m−2. Weed management tools were more effective at the sites with higher volunteerB. napusdensities. At these sites, soybean yield was greater when using an increased soybean-seeding density (44% greater yield using a seeding density of 682,500 vs. 455,000 seeds ha−1) or interrow tillage (36% greater yield with vs. without using interrow tillage). Soybean row spacing (19 vs. 38 vs. 76 cm) did not affect soybean yield, unless the reduction in row spacing was combined with an increased seeding density (65% greater yield with narrow-row soybean seeded at 682,500 vs. wide-row soybean seeded at 455,000 seeds ha−1). At the sites with higher volunteerB. napusdensities, seed production of canola volunteerB. napuswas greater when nitrogen fertilizer was applied to simulate an environment with greater nitrogen supply (77% greater number of volunteerB. napusseeds produced with vs. without broadcast application of 23 kg N ha−1urea). In northern climates, seeding soybean at increased densities using narrow-row spacing in fields with limited soil inorganic nitrogen and using interrow tillage in wide-row production systems are effective strategies that could augment chemical weed management in an integrated program for management of volunteerB. napus, and perhaps also other competitive early-season weeds.

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“…In the canola growing regions of the northern Great Plains, volunteer canola has become a common weed problem in producer fields (Gulden et al, 2003; Seerey and Shirtliffe, 2010). Under adverse harvesting conditions, all brassicas tested in the study had seed loss ranging from 2 to 41% of the harvested seed.…”

Section: Resultsmentioning

confidence: 99%

Yield Stability and Seed Shattering Characteristics of Brassica juncea Canola in the Northern Great Plains

et al. 2016

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Brassica juncea (L.) Czern. (juncea) canola has potential to become an alternative oilseed crop, but the yield stability and harvestability in northern latitudes is largely unknown. In this study, we determined seed yield and yield stability, seed shattering characteristics, and harvestability in comparison with conventional B. napus L. (napus) canola and B. juncea mustard. Six Brassica crops were tested at eight site‐years in western Canada from 2010 to 2011. Plants were harvested using straight combining on both “early” and “late” dates. Two hybrid napus canola cultivars produced seed yield averaging 2180 kg ha−1, which was 33% greater than hybrid juncea canola, 22% greater than ‘Clearfield’ juncea canola, and 80% greater than conventional juncea canola. The early compared with the late harvest reduced shattering yield loss by 16% for napus canola and 8% for the rest of the brassicas. At two sites, plants lost an average of 10,170 seeds m−2 from maturity to harvest, which translates to a seed yield loss of 366 kg ha−1; at the remaining sites, plants lost 2260 seeds m−2, which translates to a yield loss of 82 kg ha−1. We conclude that hybrid juncea canola can be used to diversify oilseed cropping systems, but the currently available juncea canola cultivars with the seed yield 27% lower than hybrid napus canola may limit its large‐scale adoption.

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Commercial generations of Brassica napus cause greater yield loss in Triticum aestivum, than volunteer B. napus generations

Cited by 5 publications

References 16 publications

Competitiveness and yield impact of volunteer oilseed rape (Brassica napus) in winter and spring wheat (Triticum aestivum)

Competitiveness and yield impact of volunteer oilseed rape (Brassica napus) in winter and spring wheat (Triticum aestivum)

Candidate Tools for Integrated Weed Management in Soybean at the Northern Frontier of Production

Yield Stability and Seed Shattering Characteristics of Brassica juncea Canola in the Northern Great Plains

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