Phenotypic influences on the incidence of infection by Ascochyta fabae in spring varieties of faba beans (Vicia faba)

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Abstract
Spring beans with a range of different growth habits were assessed for resistance to Ascochyta fabae. Variation in the incidence of both foliar and pod infection was recorded but there was no association between the two. The larger‐podded broad bean types had a higher incidence of pod infection relative to foliar infection than the smaller‐podded field beans. The effect of straw length on the incidence of A. fabae was investigated using exogenously applied gibberellin to sensitive and insensitive cultivars. This confirmed the association between long straw and low incidence of pod disease.