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Small, irregular yellow or brown spots first appear on the leaves. These spots spread with time and become deep and surround the entire leaf. Small black deep spots also appear on the fruit, which gradually spread. In moist weather, pink spores form in the center of these spots.
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To prevent this disease, treat with Vitavax (Carboxin 37.5 + Thiram 37.5) 2.5 gm/kg of seed.
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Spray Novaphanate (thiophanate methyl 70% WP) at 300 gm per acre or Jatayu (Chlorothalonil 75 WP) @ 400 gm per acre in 200 litres of water at an interval of 10 days.
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For biological control, spray Monas Curb (Pseudomonas fluorescens) @ 500 gm/acre in 200 litres of water.
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