Stemphylium blight:- Small yellow to orange flecks or streaks develop in the middle of the leaf which soon develop into elongated, spindle shaped to ovate elongate diffused spots surrounded by characteristic pinkish margin. The spots progress from the tip to the base of the leaves. The spots coalesce into extended patches, blighting the leaves and gradually the entire foliage. Spay fungicides, Mancozeb @ 0.25% / Tricyclazole @ 0.1% / Hexaconazole @ 0.1% /Propiconazole @ 0.1% at 10-15 days interval from 30 days after transplanting or as soon as disease appears.
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