Downy Brome (<i>Bromus tectorum</i>) Interference and Economic Thresholds in Winter Wheat (<i>Triticum aestivum</i>)

Stahlman, Phillip W.; Miller, Stephen D.

doi:10.1017/s0043174500056447

Cited by 58 publications

(62 citation statements)

References 12 publications

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“…are problematic throughout the winter wheat production zones of the western USA . All three species are competitive with winter wheat and each can cause substantial yield reductions at moderate densities . The growth and development patterns of feral rye, downy brome and jointed goatgrass are similar to winter wheat, ensuring that crops and weeds mature concurrently .…”

Section: Great Plains and Pacific Northwest Dryland Production Systemsmentioning

confidence: 99%

“…41,42 All three species are competitive with winter wheat and each can cause substantial yield reductions at moderate densities. [43][44][45][46] The growth and development patterns of feral rye, downy brome and jointed goatgrass are similar to winter wheat, ensuring that crops and weeds mature concurrently. 47,48 Preliminary data from a field survey in eastern Colorado found more than 75% of the seed of these weed species is retained at crop maturity (Soni N, unpublished) ( Table 1).…”

Section: Seed Retention Of Dominant Weedsmentioning

confidence: 99%

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Opportunities and challenges for harvest weed seed control in global cropping systems

Walsh

Broster

Schwartz-Lazaro

et al. 2018

Pest Management Science

111

140

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The opportunity to target weed seeds during grain harvest was established many decades ago following the introduction of mechanical harvesting and the recognition of high weed-seed retention levels at crop maturity; however, this opportunity remained largely neglected until more recently. The introduction and adoption of harvest weed seed control (HWSC) systems in Australia has been in response to widespread occurrence of herbicide-resistant weed populations. With diminishing herbicide resources and the need to maintain highly productive reduced tillage and stubble-retention practices, growers began to develop systems that targeted weed seeds during crop harvest. Research and development efforts over the past two decades have established the efficacy of HWSC systems in Australian cropping systems, where widespread adoption is now occurring. With similarly dramatic herbicide resistance issues now present across many of the world's cropping regions, it is timely for HWSC systems to be considered for inclusion in weed-management programs in these areas. This review describes HWSC systems and establishing the potential for this approach to weed control in several cropping regions. As observed in Australia, the inclusion of HWSC systems can reduce weed populations substantially reducing the potential for weed adaptation and resistance evolution. © 2017 Society of Chemical Industry.

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Section: Great Plains and Pacific Northwest Dryland Production Systemsmentioning

confidence: 99%

Section: Seed Retention Of Dominant Weedsmentioning

confidence: 99%

Opportunities and challenges for harvest weed seed control in global cropping systems

Walsh

Broster

Schwartz-Lazaro

et al. 2018

Pest Management Science

111

140

View full text Add to dashboard Cite

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“…They were identied as a novel spirocyclic g-lactam, named spirostaphylotrichin W (54, Fig. In a B. tectorum coleoptile bioassay at concentration of 10 À3 M, spirostaphylotrichin A (48) proved to be the most active compound, followed by spirostaphylotrichins C (49) and D (50). 6, Table S1 ESI †).…”

Section: Spirotoxinsmentioning

confidence: 99%

Fungal phytotoxins with potential herbicidal activity: chemical and biological characterization

Cimmino¹,

Masi²,

Evidente³

et al. 2015

Nat. Prod. Rep.

155

149

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Covering: 2007 to 2015 Fungal phytotoxins are secondary metabolites playing an important role in the induction of disease symptoms interfering with host plant physiological processes. Although fungal pathogens represent a heavy constraint for agrarian production and for forest and environmental heritage, they can also represent an ecofriendly alternative to manage weeds. Indeed, the phytotoxins produced by weed pathogenic fungi are an efficient tool to design natural, safe bioherbicides. Their use could avoid that of synthetic pesticides causing resistance in the host plants and the long term impact of residues in agricultural products with a risk to human and animal health. The isolation and structural and biological characterization of phytotoxins produced by pathogenic fungi for weeds, including parasitic plants, are described. Structure activity relationships and mode of action studies for some phytotoxins are also reported to elucidate the herbicide potential of these promising fungal metabolites.

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“…However, with yield data and concurrent weed research data from this study as well as previous weed research, insights into potential yield reductions can be made. Downy brome populations of 29 to 78 plants/sq yd reduced winter wheat yield 10 to 20% (Stahlman and Miller, 1990) and 129 plants/sq yd decreased yield 28% (Rydrych, 1974). Downy brome populations in 1996, 1999, and 2001 were 15 plants/sq yd or less (Young and Thorne, 2004) suggesting yield reduction in WWF was minimal or nonexistent.…”

Section: Crop Yieldmentioning

confidence: 99%

Comparisons of Annual No‐Till Spring Cereal Cropping Systems in the Pacific Northwest

Young¹,

Alldredge

Pan

et al. 2015

Crop Forage & Turfgrass Mgmt

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Winter wheat (Triticum aestivum L.)– summer fallow (WWF) has been the prevalent rotation in the low rainfall zone of the Pacific Northwest (PNW) for more than 130 years; however, this rotation is characterized by poor soil health, high pest incidence, and poor environmental sustainability. A 6‐year study was initiated in 1995 to evaluate the agronomic and economic feasibility of no‐till spring cereal cropping systems to replace or supplement fallow. The systems included: WWF; no‐till spring wheat‐chemical fallow (SWChF); continuous no‐till hard red spring wheat (CHRSW); and no‐till hard red spring wheat– no‐till spring barley (HRSWSB). Overall the WWF (reduced tillage fallow) system produced 25% more grain, almost $30/rotational acre more net return and was less risky compared to the second best (SWChF) system. This research was the first ever to examine a SWChF system. This system yielded higher than both the CHRSW and HRSWSB in all but 1 year. In general, HRSW yielded similarly for both systems. The 2000–2001 crop growing season was extremely dry and crop yields for that year were from 45 to 80% less than their respective 5‐year average, depending on the crop. Although all of the no‐till spring cropping systems provided greater wind erosion protection, the economic returns were negative for the duration of the study. Perhaps if compensation was provided to growers for conservation practices, adoption of these agronomically and environmentally sound systems would be readily adopted.

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Downy Brome (Bromus tectorum) Interference and Economic Thresholds in Winter Wheat (Triticum aestivum)

Cited by 58 publications

References 12 publications

Opportunities and challenges for harvest weed seed control in global cropping systems

Opportunities and challenges for harvest weed seed control in global cropping systems

Fungal phytotoxins with potential herbicidal activity: chemical and biological characterization

Comparisons of Annual No‐Till Spring Cereal Cropping Systems in the Pacific Northwest

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