Ascochyta blight—Ascochyta lathyri
Ascochyta blight is a problem on sweet pea. It causes lower
leaves and stems to rot. Petals have blackish rot and may
extend into the flower stalk. Foliage may distort or die.
Solutions
The fungus that causes Ascochyta blight persists
in plant debris and is favored by overhead irrigation and
rain. Use pathogen-free plants. Avoid wetting foliage. Keep
flowers dry and humidity low.
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Lesions on sweet pea leaf
Brown
lesions on stem and leaves
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