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Diplodia Collar Rot in Groundnut

Diplodia collar rot

Diplodia Collar Rot


Seedlings or maturing plants are infected at or near the soil surface and the fungus quickly invades the stem. The first field symptom is wilting of lateral branches or the entire plant. Infected plants usually die within a few days. The base of the infected plants and the tap root become slate gray to black.


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