Symptoms:-
- Leaves, stem, and pods of French bean are susceptible to infection.
- Small reddish-brown, slightly sunken spot form on the pods and rapidly develop into large, dark-suken lesion.
- In moist weather, masses of pink spores develop on these lesions.
- Black sunken spots, similar to those on the pods are produced on the stem and left stalks.
- Infection of the leaves causes blacking along the veins particularly on the under surface.
Control:-
- Use disease free certified seed.
- Do not grow French bean for at least two years in the same land that has carried on infected crop.
- Remove and destroy the disease infected French bean plants to check the spread of disease.
- Seed treatment with carbendazim 3gm/kg seed.
- Weekly spray with Mancozeb 3 gm/litre or chlorothalonil 2 gm/litre of water from first leaf stage till the pods mature.
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