Weed seed shatter in spring wheat in Alberta

Beckie, Hugh J.; Blackshaw, Robert E.; Harker, K. Neil; Tidemann, Breanne D.

doi:10.1139/cjps-2017-0103

Cited by 13 publications

(32 citation statements)

References 15 publications

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“…Beauv., Chenopodium album L., and Bassia scoparia (L.) A. J. Scott, retain a high proportion of seed at crop maturity and thus are good candidates for HWSC control. 9 Other weeds with high seed retention and thus greater HWSC potential include Sinapis arvensis L. and Galium spp. in dryland pulse crops, [9][10][11] A. palmeri and Amaranthus tuberculatus (Moq.)…”

Section: Opportunities For Hwsc Use In North Americamentioning

confidence: 99%

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Current outlook and future research needs for harvest weed seed control in North American cropping systems

Shergill

Schwartz-Lazaro

León

et al. 2020

Pest Management Science

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Harvest weed seed control (HWSC) comprises a set of tools and tactics that prevents the addition of weed seed to the soil seed bank, attenuating weed infestations and providing a method to combat the development and spread of herbicide-resistant weed populations. Initial HWSC research efforts in North America are summarized and, combined with the vast area of crops suitable for HWSC, clearly indicate strong potential for this technology. However, potential limitations exist that are not present in Australian cropping systems where HWSC was developed. These include rotations with crops that are not currently amenable to HWSC (e.g. corn), high moisture content at harvest, untimely harvest, and others. Concerns about weeds becoming resistant to HWSC (i.e. adapting) exist, as do shifts in weed species composition, particularly with the diversity of weeds in North America. Currently the potential of HWSC vastly outweighs any drawbacks, necessitating further research. Such expanded efforts should foremost include chaff lining and impact mill commercial scale evaluation, as this will address potential limitations as well as economics. Growers must be integrated into large-scale, on-farm research and development activities aimed at alleviating the problems of using HWSC systems in North America and drive greater adoption subsequently.

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Section: Opportunities For Hwsc Use In North Americamentioning

confidence: 99%

“…9 Other weeds with high seed retention and thus greater HWSC potential include Sinapis arvensis L. and Galium spp. in dryland pulse crops, [9][10][11] A. palmeri and Amaranthus tuberculatus (Moq.) J. D. Sauer in grain sorghum and corn, 7 Sorghum halepense (L.) Pers.…”

Section: Opportunities For Hwsc Use In North Americamentioning

confidence: 99%

Current outlook and future research needs for harvest weed seed control in North American cropping systems

Shergill

Schwartz-Lazaro

León

et al. 2020

Pest Management Science

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“…Weed seed retention varied according to climatic conditions (Shirtliffe et al, 2000;Taghizadeh et al, 2012) and would most likely vary across different agro-ecosystems (Walsh and Powles, 2007). If ≤20% and ≥80% seed shatter by direct harvest time is considered low and high, respectively (Beckie et al, 2018), S. noctiflora can be classified as high and the other species as intermediate. of their retained seeds might be reduced due to their stem growth type and seed set along the entire stem.…”

Section: Potential To Target Weed Seeds With Hwscmentioning

confidence: 99%

“…Recent studies by Burton et al (2016Burton et al ( , 2017 and Tidemann et al (2017) have also found significant differences and variation in seed shatter and retention both among and within weed species. Such variation may be associated with weed genotype or ecotype, crop or cultivar, agronomic practices, edaphic or environmental conditions or their interactions (Beckie et al, 2018).…”

Section: Poor Target For Hwscmentioning

confidence: 99%

Seed retention of ten common weed species at oat harvest reveals the potential for harvest weed seed control

Bitarafan

Andreasen

2020

Weed Research

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We assessed the seed production and shedding pattern of 10 common weed species in two oat fields in Denmark. The aim was to evaluate the possibility of harvesting retained seeds on weeds at crop harvest by a combine harvester based on estimation of weed seed retention. Before flowering, ten plants of each weed species were selected and surrounded by a seed trap comprising of a porous net. When the plants started shedding seeds, the seeds were collected from the traps and counted weekly until oat harvest. Just before oat harvest, the retained seeds on the plants were counted and the ratio of harvestable seeds and shed seeds during the growing season was determined. The seed production and shedding patterns varied between the 2 years. Across both years, Anagallis arvensis L., Capsella bursa‐pastoris L. Medik, Chenopodium album L., Geranium molle L., Persicaria maculosa Gray, Polygonum aviculare L., Silene noctiflora L., Sonchus arvensis L., Veronica persica Poir. and Viola arvensis Murray retained on average 61.6%, 52.7%, 67.2%, 58.4%, 32.05%, 59.5%, 95.7%, 23.5%, 51.7% and 33.9%, respectively, of their produced seeds at crop harvest. Silene noctiflora was classified as a good target for harvest weed seed control; C. bursa‐pastoris, C. album, G. molle, P. maculosa, S. arvensis and V. arvensis were classified as intermediate targets; and A. arvensis, P. aviculare and V. persica were classified as poor targets.

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“…For instance, Shirtliffe et al (2000) reported a growing degree-day interval for wild oat with full seed shattering between 1,470 and 1,680. Different weed-seed shattering patterns have been reported depending on the cropping system and harvest approach (swathing vs. direct harvest) (Beckie et al 2017;Burton et al 2016). In addition, wild oat and ryegrass species retained twice as much seed in Australia compared with the Great Plains region (Walsh et al 2017b).…”

Section: Seed Retention and Plant Heightmentioning

confidence: 99%

Seed retention of winter annual grass weeds at winter wheat harvest maturity shows potential for harvest weed seed control

et al. 2019

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Downy brome, feral rye, and jointed goatgrass are problematic winter annual grasses in central Great Plains winter wheat production. Integrated control strategies are needed to manage winter annual grasses and reduce selection pressure exerted on these weed populations by the limited herbicide options currently available. Harvest weed-seed control (HWSC) methods aim to remove or destroy weed seeds, thereby reducing seed-bank enrichment at crop harvest. An added advantage is the potential to reduce herbicide-resistant weed seeds that are more likely to be present at harvest, thereby providing a nonchemical resistance-management strategy. Our objective was to assess the potential for HWSC of winter annual grass weeds in winter wheat by measuring seed retention at harvest and destruction percentage in an impact mill. During 2015 and 2016, 40 wheat fields in eastern Colorado were sampled. Seed retention was quantified and compared per weed species by counting seed retained above the harvested fraction of the wheat upper canopy (15 cm and above), seed retained below 15 cm, and shattered seed on the soil surface at wheat harvest. A stand-mounted impact mill device was used to determine the percent seed destruction of grass weed species in processed wheat chaff. Averaged across both years, seed retention (±SE) was 75% ± 2.9%, 90% ± 1.7%, and 76% ± 4.3% for downy brome, feral rye, and jointed goatgrass, respectively. Seed retention was most variable for downy brome, because 59% of the samples had at least 75% seed retention, whereas the proportions for feral rye and jointed goatgrass samples with at least 75% seed retention were 93% and 70%, respectively. Weed seed destruction percentages were at least 98% for all three species. These results suggest HWSC could be implemented as an integrated strategy for winter annual grass management in central Great Plains winter wheat cropping systems.

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Weed seed shatter in spring wheat in Alberta

Cited by 13 publications

References 15 publications

Current outlook and future research needs for harvest weed seed control in North American cropping systems

Current outlook and future research needs for harvest weed seed control in North American cropping systems

Seed retention of ten common weed species at oat harvest reveals the potential for harvest weed seed control

Seed retention of winter annual grass weeds at winter wheat harvest maturity shows potential for harvest weed seed control

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