• Adopt clean cultivation and crop rotation cultural practices to prevent this disease. 
• Spray Mancozeb 75% WP at the rate of 400 gram/acre or 
• Spray kitazin 48.0 w/w  @ 400 ml/acre at 10-15 days intervals.
• Spray chlorothalonil 75% WP @ 300 gram/acre at 10 days intervals.

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Alternaria leaf blight in bottle gourd can be identified by the following symptoms-

• In the initial stages of this disease, Yellow spots appear on the leaves which then turn brown and finally turn black on ageing.
• They usually start from margins and then produce concentric rings.  
• Severely affected vines start looking like burnt charcoal.

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