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Agricultural Weed Assessment Calculator: An Australian Evaluation

1
Australian Herbicide Resistance Initiative, School of Agriculture and Environment, The University of Western Australia, Perth 6009, Australia
2
Department of Primary Industries and Regional Development, Northam 6401, Australia
3
Discipline of Agricultural and Animal Science, The University of Adelaide, Adelaide 5064, Australia
4
Queensland Department of Agriculture and Fisheries, Toowoomba 4350, Australia
*
Author to whom correspondence should be addressed.
Plants 2020, 9(12), 1737; https://doi.org/10.3390/plants9121737
Received: 25 November 2020 / Revised: 5 December 2020 / Accepted: 7 December 2020 / Published: 9 December 2020
(This article belongs to the Section Plant Protection and Biotic Interactions)
Weed risk assessment systems are used to estimate the potential weediness or invasiveness of introduced species in non-agricultural habitats. However, an equivalent system has not been developed for weed species that occur in agronomic cropland. Therefore, the Agricultural Weed Assessment Calculator (AWAC) was developed to quantify the present and potential future adverse impact of a weed species on crop production and profitability (threat analysis), thereby informing or directing research, development, and extension (RDE) investments or activities. AWAC comprises 10 questions related primarily to a weed’s abundance and economic impact. Twenty weed species from across Australia were evaluated by AWAC using existing information and expert opinion, and rated as high, medium, or low for RDE prioritization based on total scores of 70 to 100, 40 to <70, or <40, respectively. Five species were rated as high (e.g., Lolium rigidum Gaud.), eight were rated as medium (e.g., Conyza spp.), and seven were rated as low (e.g., Rapistrum rugosum L.). Scores were consistent with the current state of knowledge of the species’ impact on grain crop production in Australia. AWAC estimated the economic or agronomic threat of 20 major or minor agricultural weeds from across Australia. The next phase of development is the testing of AWAC by weed practitioners (e.g., agronomists, consultants, farmers) to verify its utility and robustness in accurately assessing these and additional weed species. View Full-Text
Keywords: agricultural weed; herbicide resistance; weed abundance; weed competition; weed loss; weed risk assessment agricultural weed; herbicide resistance; weed abundance; weed competition; weed loss; weed risk assessment
MDPI and ACS Style

Beckie, H.J.; Owen, M.J.; Borger, C.P.D.; Gill, G.S.; Widderick, M.J. Agricultural Weed Assessment Calculator: An Australian Evaluation. Plants 2020, 9, 1737. https://doi.org/10.3390/plants9121737

AMA Style

Beckie HJ, Owen MJ, Borger CPD, Gill GS, Widderick MJ. Agricultural Weed Assessment Calculator: An Australian Evaluation. Plants. 2020; 9(12):1737. https://doi.org/10.3390/plants9121737

Chicago/Turabian Style

Beckie, Hugh J., Mechelle J. Owen, Catherine P.D. Borger, Gurjeet S. Gill, and Michael J. Widderick 2020. "Agricultural Weed Assessment Calculator: An Australian Evaluation" Plants 9, no. 12: 1737. https://doi.org/10.3390/plants9121737

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