Susceptibility of lettuce cultivars to marginal leaf blight caused byPseudomonas marginalis(Brown 1918) Stevens 1925

Abstract
The rate of development of marginal leaf blight caused by Pseudomonas marginalis in different lettuce cultivars was assessed quantitatively using a susceptibility index. Considerable differences were recorded, and it is suggested that selection of a variety with low susceptibility may be useful for reducing disease losses of lettuce crops.

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