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Rust Puccinia carthami Leaf spot Cercospora carthami Leaf blight Alternaria carthami 1. RUST- Puccinia carthami Symptoms The pustules (uredosori) are chestnut brown in colour and scattered throughout the leaves. Later, black teliosori are formed on the leaves. Stem girdling occurs in older plants and rust pustules also appear on roots. Uredia and telia are produced […]
DISEASES CAUSAL ORGANISM Leaf blight Alternaria sesami Leaf spot or white spot Cercospora sesami Leaf and stem blight Phytophthora parasitica var sesami Root rot or charcoal rot Macrophomina phaseolina Wilt Fusarium oxysporium f.sp.sesami Powdery mildew Erisiphe cichoracearum Bacterial blight Xanthomonas campestris pv.sesami Bacterial leaf spot Pseudomonas sesami Leaf curl Nicotiana virus Phyllody Mycoplasma – like […]
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 […]