Abstract
Two field experiments conducted over three years at Les Buissons, Quebec demonstrated a causal relationship between the black scurf stage and the disease phase ofRhizoctonia solani on potato cultivars Green Mountain and Norland.
Planting sclerotia infested seed pieces as compared to sclerotia-free seed pieces resulted in a significant reduction in total yield, marketable yield, number of tubers, mean tuber weight, specific gravity and sometimes in total number of main stems and stolons. Daughter tubers bearing sclerotia were significantly more numerous from sclerotia infested seed sets.
Compendio
Dos experimentos conducidos durante tres años en Les Buissons, Quebec, demostraron una relación causal entre el estado de costra negra y la fase patógena deRhizoctonia solani Kuhn sobre los cultivares de papa Green Mountain y Norland.
Sembrando porciones de tubérculos-semillas infestados con esclerocios y comparándolas con porciones de tubérculos-semillas libres de esclerocios se encontró una reductión significativa en el rendimiento total, rendimiento comerciable, número de tubérculos, peso promedio de tubérculo, gravedad especifica y algunas veces en el número total de tallos principales y estolones.
Los grupos de tubérculos-semillas infestados con esclerocios produjeron tubérculos que eran portadores de un número significativamente mayor de esclerocios.
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Contribution no. 373 of the Service de recherche en Phytotechnie de Québec.
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Banville, G.J. Yield losses and damage to potato plants caused by Rhizoctonia solani Kuhn. American Potato Journal 66, 821–834 (1989). https://doi.org/10.1007/BF02853963
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DOI: https://doi.org/10.1007/BF02853963