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Host Traits Influencing Severity of White Mold of Potatoes in a Rainfed Environment

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Abstract

Differences among cultivars of Solanum tuberosum L. in susceptibility to Sclerotinia sclerotiorum (Lib.) de Bary have been noted through observation and research. Traits hypothesized as having a potential effect upon susceptibility included, flower propensity, time to 50 % flowering, flowering duration, canopy density, oxalic acid sensitivity, and maturity. Field plots were planted using seven cultivars in which these variables were quantified and analyzed. Identification of those factors providing the greatest amount of information towards disease severity were identified using multiple linear regression, and parameter selection using Akaike’s Information Criterion. The factors of maturity (R2 = 0.77), time to 50 % flower (R2 = 0.64), and oxalic acid sensitivity (R2 = 0.57) were identified as providing the greatest predictive indices of white mold severity in potatoes.

Resumen

Las diferencias en la susceptibilidad a Sclerotinia sclerotiorum (Lib.) de Bary entre variedades de Solanum tuberosum L. se ha notado a través de la observación y la investigación. Entre las características de que se tiene la hipótesis de un efecto potencial sobre la susceptibilidad se incluyen la propensión de la flor, el lapso al 50 % de la floración, duración de la floración, densidad del follaje, sensibilidad al ácido oxálico y madurez. Se plantaron lotes en el campo usando siete variedades en las cuales estas variables se cuantificaron y analizaron. Se identificaron estos factores suministrando la mayor cantidad de información hacia la severidad de la enfermedad, mediante el uso de regresión linear múltiple, y por selección de parámetro usando el criterio de información de Akaike. Los factores de madurez (R2 = 0.77), el tiempo al 50 % de floración (R2 = 0.64) y la sensibilidad al ácido oxálico (R2 = 0.57) se identificaron como los que proporcionaron los mayores índices predictivos de la severidad del moho blanco en papa.

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Acknowledgments

We appreciate the help and support of Erica and Albert Fitzpatrick, Bruce and Brandon Roope, Steve Gray, Gregory Alley-Violette, Elbridge Giggie, and James Dwyer. This work was supported in part by a grant from the Maine Potato Board Research Committee.

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Authors and Affiliations

  1. University of Maine Cooperative Extension, 57 Houlton Road, Presque Isle, ME, 04769, USA

    Andrew B. Plant

  2. University of Maine, 5722 Deering Hall Rm. 9, Orono, ME, 04469-5722, USA

    David H. Lambert

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  1. Andrew B. Plant
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  2. David H. Lambert
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Correspondence to Andrew B. Plant.

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Plant, A.B., Lambert, D.H. Host Traits Influencing Severity of White Mold of Potatoes in a Rainfed Environment. Am. J. Potato Res. 90, 386–394 (2013). https://doi.org/10.1007/s12230-013-9327-y

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  • DOI: https://doi.org/10.1007/s12230-013-9327-y

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