Best Fungicides & Spray Dosages for Tomato Early Blight & Late Blight

Published by ICAR Horticulture Research Team • Category: Vegetable Pathology • 6 min read

Tomato cultivation across major growing hubs like Kolar (Karnataka) and Madanapalle (Andhra Pradesh) suffers recurring damage from two major fungal diseases: Early Blight (Alternaria solani) and Late Blight (Phytophthora infestans). Timely diagnostic detection and correct fungicide selection are crucial for preserving fruit quality and preventing yield loss.

1. Diagnostic Differences

Early Blight (Alternaria solani): Concentric target ring spots (bullseye pattern) on lower older leaves with yellow halos.
Late Blight (Phytophthora infestans): Irregular dark water-soaked lesions expanding rapidly during cool rainy weather with white mold growth on leaf undersides.

2. ICAR Approved Fungicide Spray Dosages

🧪 Certified Chemical Spray Options (per Liter of Water):

Bayer Nativo (Tebuconazole 50% + Trifloxystrobin 25% WG): 0.75 grams per Liter of water. PHI: 7 Days.
Mancozeb 75% WP (Indofil M-45): 2.5 grams per Liter of water. PHI: 14 Days.
Copper Oxychloride 50% WP (Blitox): 3.0 grams per Liter of water. PHI: 10 Days.

3. Cultural & Organic Management

Drip irrigation to minimize free water on foliage.
Remove infected lower leaves and burn or bury them away from the main plot.

Disclaimer: Always consult your local Agricultural Extension Officer (AEO) or Krishi Vigyan Kendra (KVK) scientist before spraying high-concentration agro-chemicals.