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DISEASES CAUSAL ORGANISM Root rot Macrophomina phaseolina Powdery mildew Oidium sp. Leaf spots Alternaria sp. Cassava Mosaic Disease (CMD) Cassava mosaic gemini virus (CMG) 1. Root rot – Macrophomina phaseolina Symptom Symptoms include yellowing of foliage, reduced leaf size, and eventual death of the plant due to root rot. The affected tissues show shredding of […]
DISEASES CAUSAL ORGANISM Blast Pyricularia grisea Seedling blight / leaf blight Helmithosporium nodulosum Wilt / foot rot Sclerotium rolfsii Downy mildew/Green ear/Crazy top Sclerospora macrospora Smut Melanopsichium eleusinis Mottle streak Mottle streak virus 1. BLAST – Pyricularia grisea Symptoms The pathogen attacks the crop from seedling stage to the time of grain formation. Characteristic spindle-shaped […]