A risk assessment framework for seed degeneration: Informing an integrated seed health strategy for vegetatively-propagated crops

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dc.creatorThomas-Sharma, Sara
dc.creatorAndrade-Piedra, J.L.
dc.creatorCarvajal-Yepes, Mónica
dc.creatorHernández Nopsa, J.F.
dc.creatorJeger, Michael
dc.creatorJones, Roger
dc.creatorKromann, P.
dc.creatorLegg, James P.
dc.creatorYuen, Jonathan
dc.creatorForbes, G.
dc.creatorGarrett, K.A.
dc.date2017-10
dc.date2017-05-26T16:25:15Z
dc.date2017-05-26T16:25:15Z
dc.date.accessioned2026-06-27T18:02:23Z
dc.descriptionPathogen buildup in vegetative planting material, termed seed degeneration, is a major problem in many low-income countries. When smallholder farmers use seed produced on-farm or acquired outside certified programs, it is often infected. We introduce a risk assessment framework for seed degeneration, evaluating the relative performance of individual and combined components of an integrated seed health strategy. The frequency distribution of management performance outcomes was evaluated for models incorporating biological and environmental heterogeneity, with the following results. (1) On-farm seed selection can perform as well as certified seed, if the rate of success in selecting healthy plants for seed production is high; (2) when choosing among within-season management strategies, external inoculum can determine the relative usefulness of ‘incidence-altering management’ (affecting the proportion of diseased plants/seeds) and ‘rate-altering management’ (affecting the rate of disease transmission in the field); (3) under severe disease scenarios, where it is difficult to implement management components at high levels of effectiveness, combining management components can be synergistic and keep seed degeneration below a threshold; (4) combining management components can also close the yield gap between average and worst-case scenarios. We also illustrate the potential for expert elicitation to provide parameter estimates when empirical data are unavailable.[Formula: see text] Copyright © 2017 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license .
dc.identifierhttps://hdl.handle.net/10568/81225
dc.identifier.urihttp://hdl.handle.net/123456789/153183
dc.languageen
dc.publisherScientific Societies
dc.rightsOpen Access
dc.sourceThomas-Sharma, Sara; Andrade-Piedra, Jorge; Carvajal Yepes, Monica; Hernandez Nopsa, John; Jeger, Michael; Jones, Roger; Kromann, Peter; Legg, James; Yuen, Jonathan; Forbes, Gregory; Garrett, Karen A.. 2017. A risk assessment framework for seed degeneration: Informing an integrated seed health strategy for vegetatively-propagated crops . Phytopathology 107(10): 1123-1135.
dc.subjectbananas
dc.subjectcassava
dc.subjectroot crops
dc.subjectpotatoes
dc.subjectseeds
dc.subjectsimulation models
dc.subjectsweet potatoes
dc.subjectvegetative propagation
dc.subjectyams
dc.subjectbanano
dc.subjectplantas de raíces comestibles
dc.subjectpapa
dc.subjectsemillas
dc.subjectmodelos de simulación
dc.subjectbatata
dc.subjectpropagación vegetativa
dc.subjectnames
dc.titleA risk assessment framework for seed degeneration: Informing an integrated seed health strategy for vegetatively-propagated crops
dc.typeJournal Article

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