Charles Sturt University
Graham Centre for Agricultural Innovation

Mrs Jane Kelly

Mrs Jane Kelly

The impact of weed seeds on sheep production for different sheep genotypes

Seed contamination in sheep carcasses by barley grass: an analysis of prevalence, economic impact and management.

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Seed contamination of sheep presents considerable animal welfare concerns and incurs significant costs to Australian sheep meat producers and processors. Barley grass (Hordeum spp. Link.) is a key perpetrator, increasing in prevalence across southern Australia, while also exhibiting herbicide resistance to glyphosate and other post-emergent grass herbicides (Shergill, Malone, Boutsalis, Preston, & Gill, 2015). Additionally, variable seed dormancy patterns in response to environmental changes have been noted, resulting in increased potential for seed contamination in these regions. Little information exists regarding the regional severity of seed contamination across Australia, specific associations with weed distribution patterns and the impact of climate variability. The impact of integrating common control strategies, density dependent variation in Hordeum spp. populations and costs associated with seed contamination also remain unknown. This project will analyse Australian abattoir, weed and climate datasets to estimate and predict regional severity of seed contamination, including weed distribution and climate impacts. Field studies will examine integrated methods for barley grass management, whilst controlled environment experiments will examine density dependent morphological variation in barley grass populations. This data will aid the development of models to identify economic thresholds for barley grass control and the subsequent management of seed contamination in lamb production systems.

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Associate Professor Jane Quinn, Professor Leslie Weston Professor  Karl Behrendt, Dr John Broster and Dr Paul Weston

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MLA and GRDC. This investigation is closely aligned with CSU project entitled "Combating herbicide resistance using IWM strategies in the Southern Region mixed farming systems", led by Prof Leslie Weston and John Piltz (NSW DPI).

AW Howard Memorial Trust Fellowship

Charles Sturt University Orange campus grants

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Read more on CSU Research Output.

  • Kelly, JE, Quinn, JC, Loukopoulos, P, Broster, JC, Behrendt, K, Weston, LA (2018) Seed contamination in sheep: new investigations into an old problem. Animal Production Science 58, 1538-1544.
  • Kelly, J. E., Quinn, J. C., Loukopoulos, P., Nielsen, S. G., Weston, P., Broster, J. C., & Weston, L. A. (2018). The effect of integrating defoliation with herbicides on barley grass survival in a legume pasture. Paper presented at the 21st        Australasian Weeds Conference, Sydney, New South Wales, Australia.
  • Kelly, J.E., Quinn, J.C., Nielsen, S.G., Weston, P., Broster, J.C., Loukopoulos, P., Weston, L.A. (2017) Location, climate and weed patterns influence the incidence of weed seed contamination in sheep carcases across Australia, Weed    Research (Under review)
  • Kelly, J. E., Quinn, J. C., Loukopoulos, P., Nielsen, S. G., Weston, P., Broster, J. C., & Weston, L. A. (2016). Current perspectives on the impact of weed seed contamination in sheep. Paper presented at the 20th Australasian Weeds  Conference, Perth, Western Australia
  • Kelly, JE (2016) Defining cause and effects associated with prevalence of key weeds across the region in terms of livestock productivity and carcass quality. Report for MLA, project B.WEE.0146, August 2016 (Charles Sturt University:          NSW)

(Prior to CSU) - Jane Kelly (nee Mason)

  • Kelly J. (2012). Livestock Welfare Descriptors - Using Consistent Language. Proceedings of the Australian Veterinary Association (AVA) Annual Conferences, 2012 AVA Annual Conference, Canberra
  • Mason J, Blackwood I and Kilgour B (2010). Dealing with RSPCA cases. Australian Farm Business Journal Volume 7, Issue 1
  • Mason J and Behrendt K (2009). Producers dealing with problem pasture species that cause seed contamination and production losses in lamb production systems. Proceedings of the 2009 Grasslands Conference, Taree.
  • Mason J, Behrendt K, Toohey E and White A (2009). Using Bioclip as an effective method in managing the impact of grass seed contamination on lamb production. Proceedings of NSW DPI Sheep and Beef 2008 Annual Conference,       Orange.
  • Lee G, Dowling P and Mason JE (2006). Botanical composition and availability of a temperate perennial pasture in spring and their effects on wool quality. Australian Society of Animal Production 26th Biennial Conference, Short     Communication Number 26.

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