부산대학교 도서관

Diseases such as Sclerotinia white mold (SWM), caused by the fungus Sclerotinia sclerotiorum (Lib.) de Bary, and Botrytis grey mold (BGM), caused by the fungus Botrytis cinerea Pers., may be limiting factors for lentil production in wetter areas of Alberta, Canada. Field trials were conducted at the Lethbridge Research and Development Centre from 2013 to 2015 to evaluate the response of lentil cultivars to SWM and BGM and yield impacts. Ten lentil cultivars from five market classes were evaluated under irrigated and dryland plots with two planting densities (120 and 160 plants*[m.sup.-2]). Year and irrigation had the largest effect on disease incidence, with highest SWM incidence occurring under irrigation in 2013, followed by 2014 and 2015. Conversely, BGM incidence under irrigation was highest in 2015 and lowest in 2013, but levels were lower than SWM. Significantly (P < 0.05) lower disease incidences were observed in dryland plots, which also produced higher yield than irrigated plots. Cultivars varied significantly in SWM incidence and yield under irrigated and dryland conditions, perhaps due to variable disease pressure, but there was no consistent trend in cultivar performance. BGM incidence was similar in cultivars, but differed among years. These findings indicate that SWM may be a limiting factor to lentil production in wetter areas, as the 10 cultivars from five market classes tested were all highly susceptible to SWM. Key words: lentil, white mold, grey mold, Sclerotinia sclerotiorum, Botrytis cinerea. La fletrissure sclerotique du soja (FSS), causee par le champignon Sclerotinia sclerotiorum (Lib.) de Bary, et la moisissure grise du haricot (MGH), attribuable au le champignon Botrytis cinerea Pers., pourraient nuire a la culture de la lentille dans les parties les plus humides de l'Alberta, au Canada. De 2013 a 2015, les auteurs ont effectue des essais sur le terrain au Centre de recherche et de developpement de Lethbridge en vue d'evaluer la reaction de divers cultivars de lentille a la FSS et a la MGH, ainsi que l'impact de ces maladies sur le rendement. Dix varietes de cinq categories marchandes ont ainsi ete testees sur des parcelles irriguees ou arides, a deux densites de semis (120 plants par [m.sup.2] et 160 plants par [m.sup.2]). L'annee et l'irrigation sont les deux facteurs qui exercent la plus grande influence sur l'incidence de la maladie, la FSS ayant enregistre la plus forte incidence sur les parcelles irriguees en 2013, puis en 2014 et 2015. L'incidence de la MGH a atteint son point le plus eleve sur les parcelles irriguees en 2015 et son point le plus bas en 2013, mais elle etait inferieure a celle de la FSS. L'incidence des deux maladies etait significativement (P < 0,05) plus faible sur les parcelles arides, dont le rendement a egalement depasse celui releve sur les parcelles irriguees. L'incidence de la FSS varie nettement selon le cultivar, comme le fait le rendement sur les parcelles irriguees et arides, peut-etre en raison de la pression variable exercee par la maladie. Cependant, les auteurs n'ont observe aucune tendance stable dans la performance des varietes testees. L'incidence de la MGH etait similaire chez les differents cultivars, mais elle varie d'une annee a l'autre. Ces constatations laissent croire que la FSS pourrait restreindre la production de lentilles dans les zones plus humides, puisque les dix cultivars des cinq classes marchandes testes sont tous extremement sensibles a cette maladie. [Traduit par la Redaction] Mots-cles: lentille, sclerotiniose, moisissure grise, Sclerotinia sclerotiorum, Botrytis cinerea.
Introduction Lentil (Lens culinaris Medik.) is an important pulse crop grown worldwide, including western Canada and the northern Great Plains of the United States. Lentil was grown on approximately 1.7 [...]