Relationship between relative time of emergence of Tartary buckwheat (<i>Fagopyrum tataricum</i>) and yield loss of barley

O’Donovan, John T.; McClay, A. S.

doi:10.4141/p02-042

Cited by 2 publications

(1 citation statement)

References 3 publications

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“…In many areas of western Canada where relatively cool and dry early-spring conditions are not conducive to early vigorous weed establishment, an early, well-timed, incrop application of glyphosate in glyphosate-tolerant canola may eliminate the need for pre-seed glyphosate in zero-till systems . Recent Canadian work has examined the critical period in canola (Martin et al 2001;Clayton et al 2002), field pea (Pisum sativum L.) (Harker et al 2001) Acker et al 1993;Chandler et al 2001;Halford et al 2001), corn ; and barley (Weaver and Ivany 1998;O'Donovan and McClay 2002).…”

Section: The Critical Period Of Weed Controlmentioning

confidence: 99%

Strategies and tactics for herbicide use reduction in field crops in Canada: A review

Nazarko¹,

Acker²,

Entz³

2005

Can. J. Plant Sci.

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There are many economic and health reasons for reducing pesticide use in Canada. Herbicide use on field crops is by far the most common pesticide use in Canada. This paper is a review of four topics related to herbicide use reduction on field crops in Canada: (1) broad strategies and (2) specific tactics for herbicide use reduction; (3) factors affecting adoption; and 4) research approaches for improving the implementation of herbicide use reduction. Numerous tactics exist to use herbicides more efficiently and herbicides can sometimes be replaced by non-chemical weed control methods. Many of these tactics and methods have been investigated and demonstrated for use on field crops in Canada. However, herbicide use reduction is fundamentally dependent upon preventative strategies designed to create robust cropping systems that maintain low weed densities. Diverse crop rotation forms the basis of preventative strategies as it inherently varies cropping system conditions to avoid weed adaptation. There is evidence that residual weed densities resulting from herbicide use reduction are manageable within competitive cropping systems. A great deal of research has been done on herbicide use reduction on field crops in Canada, and most projects report definite possibilities for herbicide use reduction in field crop production in Canada. Synthesizing and extending this information and customizing it for use on individual farms remain challenges. Collaboration between researchers and farmers can help to build successful strategies for herbicide use reduction which reflect the context of modern farming, the will of farmers and the culture of technology adoption among farmers. Key words: Pesticide use reduction, low-input agriculture, integrated pest management, integrated weed management

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Section: The Critical Period Of Weed Controlmentioning

confidence: 99%

Strategies and tactics for herbicide use reduction in field crops in Canada: A review

Nazarko¹,

Acker²,

Entz³

2005

Can. J. Plant Sci.

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Effect of Kochia (Kochia scoparia) Interference on Sunflower (Helianthus annuus) Yield

Lewis

Gulden

2014

Weed sci.

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Kochia is a weed found in many sunflower fields across the Northern Great Plains. There is limited information about the ability of sunflower plants to compete with kochia, specifically when the weed grows both in the crop row and in the inter-row space, as in zero tillage systems that rely solely on herbicides to manage weeds. An experiment was conducted over seven site–yr, from 2009 to 2011, to determine the effect of kochia density and relative time of kochia seedling recruitment on sunflower growth and development, yield and seed quality. Kochia seed was broadcast on the soil surface at six densities, into sunflowers planted in 75-cm rows, either at the same time as the sunflower crop was planted (early weed seedling recruitment), or when the sunflowers were at the four-leaf stage (late weed seedling recruitment). When kochia plants emerged at the same time as the sunflowers, yield was reduced by up to 76% and sunflower head diam was reduced in four site–yr, stem diam was reduced in three site–yr, height was reduced in two site–yr and the number of leaves per sunflower plant was reduced in two site–yr The 5% action threshold for early emerging kochia was four kochia plants m−2in the combined site–yr analysis. Additionally, early recruiting kochia seedlings reduced sunflower seed size and seed weight at two and three site–yr, respectively. Kochia plants that emerged after the four-leaf stage of the sunflower crop did not affect sunflower growth and development, yield, or seed quality. To reduce the potential for yield and seed quality losses, sunflower growers should be proactive with respect to managing kochia in sunflowers, particularly when the kochia plants emerge at about the same time as the sunflowers.

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Relationship between relative time of emergence of Tartary buckwheat (Fagopyrum tataricum) and yield loss of barley

Abstract: . Plus l'adventice lève tôt, comparativement à la culture, plus les pertes de rendement sont élevées. Le modèle testé est utilisé dans les systèmes informatiques servant à établir quand prendre des mesures pour lutter contre les mauvaises herbes dans l'ouest du Canada.

Cited by 2 publications

References 3 publications

Strategies and tactics for herbicide use reduction in field crops in Canada: A review

Strategies and tactics for herbicide use reduction in field crops in Canada: A review

Effect of Kochia (Kochia scoparia) Interference on Sunflower (Helianthus annuus) Yield

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