Minimizing competition between glyphosate-resistant volunteer canola (<i>Brassica napus</i>) and glyphosate-resistant soybean: impact of soybean planting date and rate

Mierau, Allyson; Johnson, Eric N.; Gulden, Robert H.; Weber, Jessica D.; May, William E.; Willenborg, Christian J.

doi:10.1017/wet.2019.97

Cited by 4 publications

(5 citation statements)

References 29 publications

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“…This increased ranking reflects the yearly trends in canola area and its frequency in annual crop rotations, as well as prevailing herbicide-use and management practices. Weediness of canola volunteers is aided by high fecundity, seed loss before or during harvest, and secondary seed dormancy (Mierau et al 2019). Although pod-shattering tolerance is being bred into commercial cultivars, potential seed loss before and during harvest is still substantial (Gulden et al 2003).…”

Section: Interference Of Herbicide-resistant Canola Volunteersmentioning

confidence: 99%

“…Management of HR canola volunteers is most challenging in broadleaf crops. For example, limited herbicide options to control HR canola volunteers in pulse crops, sugarbeet, and soybean (Stachler and Luecke 2009) increases the necessity of optimizing crop competitiveness to mitigate yield loss (Geddes and Gulden 2018;Mierau et al 2019). Pollen-mediated gene flow from adjacent GR canola fields or admixtures in planted seed lots can result in trait stacking in volunteers, even if the cultivar grown in a field is not GR (Beckie et al 2003;Friesen et al 2003;Hall et al 2000; Figure 1), which the grower may not anticipate.…”

Section: Management Of Herbicide-resistant Canola Volunteersmentioning

confidence: 99%

“…Illinois, Iowa, Minnesota, Nebraska, Indiana, Missouri, and Ohio were major soybean-producing states in the United States in 2019 (USDA−NASS 2020). Soybean production in Canada has been historically in Ontario and Quebec; however, in recent years, growers have adopted GR soybean in Manitoba and Saskatchewan (Mierau et al 2019).…”

Section: Soybeanmentioning

confidence: 99%

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Interference and management of herbicide-resistant crop volunteers

et al. 2021

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Since the commercialization of herbicide-resistant (HR) crops, primarily glyphosate-resistant (GR) crops, their adoption increased rapidly. Multiple HR traits in crops such as canola (Brassica napus L.), corn (Zea mays L.), cotton (Gossypium hirsutum L.), and soybean [Glycine max (L.) Merr.] are available in recent years, and management of their volunteers need attention to prevent interference and yield loss in rotational crops. The objectives of this review were to summarize HR crop traits in barley (Hordeum vulgare L.), canola, corn, cotton, rice (Oryza sativa L.), soybean, sugarbeet (Beta vulgaris L.), and wheat (Triticum aestivum L.); assess their potential for volunteerism; and review existing literature on the interference of HR crop volunteers, yield loss, and their management in rotational crops. Herbicide-resistant crop volunteers are problem weeds in agronomic cropping systems, and the impact of volunteerism depends on several factors such as crop grown in rotation, the density of volunteers, management practices, and micro-climate. Interference of imidazolinone-resistant (IR) barley or wheat volunteers can be a problem in rotational crops, particularly when IR crops such as canola or wheat are grown. Herbicide-resistant canola volunteers are abundant in the Northern Great Plains due to high fecundity, seed loss before or during harvest, secondary seed dormancy, and can interfere in crops grown in rotation such as flax (Linum usitatissimum L.), field peas (Pisum sativum L.), and soybean. Herbicide-resistant corn volunteers are competitive in crops grown in rotation such as corn, cotton, soybean, and sugarbeet, with yield loss depending on the density of HR corn volunteers. Volunteers of HR cotton, rice, soybean, and sugarbeet are not major concerns and can be controlled with existing herbicides. Herbicide options would be limited if the crop volunteers are multiple HR; therefore, a record-keeping of cultivar planted the previous year and selecting herbicide is important. The increasing use of 2,4-D, dicamba, glufosinate, and glyphosate in North American cropping systems requires research on herbicide interactions and alternative herbicides or methods for controlling multiple HR crop volunteers.

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Section: Interference Of Herbicide-resistant Canola Volunteersmentioning

confidence: 99%

Section: Management Of Herbicide-resistant Canola Volunteersmentioning

confidence: 99%

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Interference and management of herbicide-resistant crop volunteers

et al. 2021

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“…(Blackshaw et al 2007). In this regard, selection of right crop variety, uniform and healthy seed and seed size, uniform germination, proper seedling depth, climate, and suitable planting pattern will definitely help in the effective weed management (Place et al 2009;Korres et al 2019;De Bruin and Pedersen 2008;Mierau et al 2020).…”

Section: Cultural Weed Controlmentioning

confidence: 99%

Integrated Weed Management for Sustainable Agriculture

Hussain

Abideen

Danish

et al. 2021

Sustainable Agriculture Reviews

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Increased world population will demand more food production, less water-consuming crops, better crop production techniques and better strategies for weed control. More production with rational use of available resources should enhance food security. Here, we review weed management approaches, which vary from crop to crop, with focus on organic weed management, non-chemical weed control, cover crops and allelopathy. Weeding practice in any crop depends on crop factors such as position in rotation, plant spacing and architecture; on field factors such as soil type and weed seed bank history; and on seasonal factors, e.g. rainfall. Crop losses can be reduced by integrated weed management with resistant crop varieties, rational use of agrochemicals, biocontrol agents, allelopathic crops, crop rotation and better cultural practices. Complementary weed control methods include grazing, herbicide application, land fallowing, biological control, cover crops, inclusion of competitive ability of crops, mechanical weeding, sowing time adjustment, irrigation methods, mulching and intercropping.

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“…Increasing soybean plant densities by 50% above the standard density did not translate into a shortening of the CWFP. This was surprising, as increasing soybean densities several-fold above standard densities resulted in continued improvements to the competitive effect and competitive response in soybean when subjected to interference from volunteer B. napus, the dominant weed in soybean in western Canada (Mierau et al 2019). The findings here suggest an upper limit to the effect of soybean density on the CWFP in soybean; it must be noted that at most site-years, the CWFP at the standard soybean plant densities was short (V1-V2) with little room for further improvement (Table 4).…”

Section: Target Density Experimentsmentioning

confidence: 99%

Cultural weed management practices shorten the critical weed-free period for soybean grown in the Northern Great Plains

Rosset

Gulden

2019

Weed Sci

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Soybean [Glycine max (L.) Merr.] has recently become a popular rotational crop in the Canadian Northern Great Plains where herbicide-resistant (HR) soybean cultivars have been widely adopted. Intense reliance on herbicides has contributed to the development of HR weeds in soybean and other crops. Cultural weed management practices reduce the need for herbicides and lower the selection pressure for HR weed biotypes by improving the competitiveness of the crop. The effects of two row spacings, three target densities, and three cultivars on the critical weed-free period (CWFP) in soybean were evaluated as three separate experiments in southern Manitoba. In the row-spacing experiment, soybean grown in narrow rows shortened the CWFP by up to three soybean developmental stages at site-years with increased weed pressure. In the target density experiment, low-density soybean stands lengthened the CWFP by one soybean developmental stage compared with higher-density soybean stands. The effect of soybean cultivar varied among locations, yet tended to be consistent within location over the 2-yr study, suggesting that competitive ability in these soybean cultivars was linked to edaphic and/or environmental factors. Generally, the cultivar with the shortest days to maturity, which also had the shortest stature, consistently had a longer CWFP. Each of these cultural practices were effective at reducing the need for in-crop herbicide applications.

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Minimizing competition between glyphosate-resistant volunteer canola (Brassica napus) and glyphosate-resistant soybean: impact of soybean planting date and rate

Cited by 4 publications

References 29 publications

Interference and management of herbicide-resistant crop volunteers

Interference and management of herbicide-resistant crop volunteers

Integrated Weed Management for Sustainable Agriculture

Cultural weed management practices shorten the critical weed-free period for soybean grown in the Northern Great Plains

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