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Reducing the impact of Sclerotinia disease by determining optimum crop rotations using dynamic programming

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  • Vosough Ahmadi, Bouda
  • Burnett, Fiona J
  • Young, Caroline S
  • McQuilken, Mark P
  • Stott, Alistair W
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    Abstract

    Sclerotinia rot is a disease caused by the fungus Sclerotinina sclerotiorum which affects a wide range of crops and causes major yield and economic losses. Crop rotation is an important strategy for minimising losses. A dynamic programming (DP) model was developed to study the trade-offs between state of the land, severity of sclerotinia and financial impacts as a result of different cropping decisions. Results showed that rotation and treatment against sclerotinia was financially justified yet permitted intensive yet sustainable production of susceptible food crops in the long-run. Allocation of even a small proportion of cropping decisions to break crops coupled with treatments in the rotation mitigated long-term build-up of sclerotia in land. However in the short-run, high proportions and high frequencies of cropping decisions need to be either allocated to break crops or treated-susceptible crops in order to avoid the disease and to generate profit. Results showed that DP methodology provides a useful framework to explore the trade-offs between crop rotation and growing high value susceptible crops in the long- and short-term in relation to plant diseases in arable agriculture that are at the heart of sustainable food production and land use.

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    Bibliographic Info

    Paper provided by Scotland's Rural College (formerly Scottish Agricultural College), Land Economy & Environment Research Group in its series Working Papers with number 152213.

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    Date of creation: 2013
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    Handle: RePEc:ags:srlewp:152213

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    Web page: http://www.sruc.ac.uk/info/120037/land_economy_and_environment
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    Related research

    Keywords: sclerotinia; crop rotation; dynamic programming; optimisation; agriculture; Crop Production/Industries; Farm Management;

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    1. Onstad, David W. & Rabbinge, Rudy, 1985. "Dynamic programming and the computation of economic injury levels for crop disease control," Agricultural Systems, Elsevier, Elsevier, vol. 18(4), pages 207-226.
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