Disease - Early blight
Pathogen - Alternaria solani
Symptoms - Early blight is the most common disease found in tomato plants. This disease is spread by fungus. Due to this disease, spots on the leaves of plants begin to appear. These spots first appear on the older leaves near the plant base. As these spots grow, leaves begin to fall. The outbreak of this disease is higher when the temperature is between 26-30°c. This disease occurs due to excessive moisture while fruiting on plants. Due to this disease, small, dark and light brown spots spread on the leaves of plants at the starting stage. Later on developing, these spots change into black color. The causal fungus can also cause symptoms on stems & fruits of plant. Usually, this disease infects the plant at the time of fruit set.
Damage - Due to this disease the plants die dry and the flowers and fruits get rotten.
Control - To control this disease, spray 400-500 gm mencozeb fungicide in 150-200 liter water per acre. Spray this, at the interval of 12-15 days.
Management - Use fresh seed from healthy fruits. Destroy all infected plants after removing from field. Use resistant variety.