Early blight – Gramophone

Management of Early Blight in Potato

Management of early blight in Potato:-

Diseased plant parts should be destroyed properly, Avoid irrigation in cool cloudy weather and time irrigation to allow plants time to dry before nightfall.
Maintain good soil fertility and crop vigor, Harvest when skin is mature to avoid bruising and in turn infection of tubers.
Spray 2 gm Mancozeb 75 WP + 10 gm urea per litre of water at 15 days interval when symptoms start or Carbendazim 12%+ Mancozeb 63% WP @ 50 Gm/15 litre water or Copper oxychloride 50% WP@ 50 Gm/ 15 litre water.

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Brown-black necrotic spot-angular, oval shape characterized by concentric rings on the upper leaf surface.
Carbendazim 12%+ Mancozeb 63%@ 300 gm/acre.
Thiophanate methyl 70% Wp @ 250 gm/acre.
Chlorothrlonil 75% WP @ 250 gm/acre.
Kasugamycin 5% + Copper Oxychloride 46% WP@ 300 gm/acre.

The fungus attacks the foliage causing characteristics leaf spots and blight.
Small, isolated, scattered pore brown spot appear on the leaf.
Fully developed spots are irregular, brown, to dark brown in colour and with concentric ring (2-5mm ) inside the spot.
Symptoms start from the lowest leaves and progress upward.

Control:-

Spray 2 g Mancozeb 75 WP + 10 g urea per litre of water at 15 days interval when symptoms start or Carbendazim 12%+ Mancozeb 63% WP @ 50 Gm/15 litre water or Copper oxychloride 50% WP@ 50 Gm/ 15 litre water.

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