ABSTRACT

Faba bean is susceptible to several leaf diseases caused by pathogenic fungi. With the increasing importance of faba bean in northern European cropping systems, the importance of its leaf diseases is likely to increase. The aim of this study was to discriminate the diseases and to test agronomic strategies for limiting their spread in a five-year experiment. Chocolate spot disease caused by Botrytis spp. and leaf blotches caused by an Alternaria/Stemphylium complex dominated, the severity of rust was lower, and downy mildew occurred in only one year. The severity of the diseases depended on weather conditions and cultivar, but not on sowing rate. Application of fungicides significantly decreased the severity of chocolate spot, leaf blotch and rust, but not downy mildew, and in no case was the disease progress stopped. None of the cultivars showed strong resistance to disease. The Alternaria/Stemphylium leaf blotch is an emerging disease of faba bean in northern Europe. Work continues on the identification of the responsible species in the chocolate spot and leaf blotch complexes and the determination of their relative importance in causing disease.

摘要

蚕豆易患由病原真菌引起的多种叶病。随着蚕豆在北欧种植系统中的重要性日益增加，其叶病的重要性可能会增加。这项研究的目的是在为期五年的实验中区分疾病并测试限制其传播的农艺策略。由贵腐菌引起的巧克力斑病。和由链格孢属/ Stemphylium引起的叶斑复合为主，锈病严重程度较低，霜霉病仅发生一年。疾病的严重程度取决于天气条件和品种，而不是播种率。杀菌剂的施用显着降低了巧克力斑病、叶斑病和锈病的严重程度，但对霜霉病的影响没有显着降低，而且在任何情况下都没有停止病害的发展。没有一个品种表现出很强的抗病能力。该孢/匍柄叶斑病是北欧蚕豆的新出现的疾病。继续致力于确定巧克力斑病和叶斑病复合物中的相关物种，并确定它们在引起疾病方面的相对重要性。