Fungal Diseaseअगेती झुलसा रोग (टमाटर व आलू)Parts: Leaves, Stem, Fruit/Pods
Early Blight (Alternaria solani)
Affects: Tomato, Potato, Brinjal
Primary Chemical Cure
Carbendazim 12% + Mancozeb 63% WP (Saaf) or Azoxystrobin + Tebuconazole (Custodia)
300-400 gm Saaf or 300 ml Custodia per acre.
Economic Threshold (ETL)
First appearance of 2-3 target-board spots per leaf on lower foliage.
Initiate spray only when crossed
Bio & Organic Option
Foliar spray of Trichoderma harzianum @ 5 gm/liter with 1% cow urine.
Key Visual Diagnostic Symptoms
Inspect Leaves and Stem and Fruit/Pods in the field for these definitive physical manifestations:
- Concentric dark brown rings resembling a target board or bullseye on older lower leaves.
- Leaves turn yellow around the lesions and drop prematurely.
- Sunken dark leathery spots at stem-end of tomato fruits.
Weather & Climate Factors Fueling Outbreaks
Frequent light rains followed by warm sunny weather (24°C - 29°C) and heavy dews.
Track real-time rain and humidity on our Aaj Ka Mausam Radar to preempt epidemics.
Preventive Agronomic & Cultural Controls
- Ensure wide plant spacing for aeration; avoid overhead sprinkler watering.
- Remove lower infected leaves touching moist soil.
Recommended Active Molecule
View technical dilution rates, rainfastness intervals, and genuine brands:
Carbendazim 12% + Mancozeb 63% WP
Benzimidazole + Dithiocarbamate • 300 – 400 gm per acre
Other Threats to Tomato
Calculate Chemical Spray Tank Mix
Calculate exact chemical dilution for your knapsack pump or field acreage before spraying.
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Frequently asked questions
The recommended chemical control is Carbendazim 12% + Mancozeb 63% WP (Saaf) or Azoxystrobin + Tebuconazole (Custodia), applied at 300-400 gm Saaf or 300 ml Custodia per acre.. Ensure complete foliage coverage, spraying during early morning or evening hours.
First appearance of 2-3 target-board spots per leaf on lower foliage.. Chemical sprays should only be initiated when the pest population or disease incidence crosses this threshold to avoid unnecessary spray costs and pesticide resistance.
Yes. Foliar spray of Trichoderma harzianum @ 5 gm/liter with 1% cow urine.. Combining biological controls with cultural practices like crop rotation and removing infected plant debris offers sustainable control without chemical residues.
Early Blight (Alternaria solani) predominantly infects Tomato, Potato, Brinjal, attacking the Leaves, Stem, Fruit/Pods.