1)Fruit Rot: Major disease of tomato and observed due to changing weather. Water soaked lesions are appeared on fruits. Afterwards they turn into black or brown color and causing rotting of fruits.
Before sowing, do seed treatment with Tricoderma@5-10gm or Carbendazim@2gm or Thiram@3 gm/Kg of seeds. If infection observed in field collect and destroy infected fruit and leaves which lies on ground. Fruit rot and anthracnose attacked mostly observed in cloudy weather, to control take spray of Mancozeb@400gm or Copper Oxychloride@300gm or Chlorothalonil@250gm/200Ltr water. Repeat spray with 15 days interval.
2)Anthracnose: Warm temperatures, high moisture are ideal condition for spread of this disease. It is characterized by black spots that are formed on infected parts. Spots are usually circular, water-soaked and sunken with black margins. The fruits with many spots drop off prematurely resulting in heavy loss of yield.
If Infestation of Anthracnose is observed. To control this disease, spraying of Propiconazole or Hexaconazole@200ml/200Ltr of water should be done.
3)Early Blight: Common and major disease of tomato. Initially small, brown isolated spots are observed on leaf. Later spots are seen on stem and also on fruits. Fully developed spots become irregular, dark brown color with concentric ring inside spots. In severe condition, defoliation occurred.
If infestation of early blight is observed, take spray of Mancozeb@400gm or Tabuconazol@200ml/200Ltr. Repeat spray 10-15 days after first spray. In cloudy weather, chances of incidence of early and late blight increases. As a preventive measure, spray with Chlorothalonil@250gm/100Ltr of water. Also sudden rain pattern aggravate blight and other diseases take spray of Copper based fungicides@300gm/Ltr+Streptocycline@6gm/200Ltr water to control blight disease.
4)Wilt and Damping off: Moist and poorly drain soil causes damping off disease. It is soil borne disease. Water soaking and shriveling of stem occurs. Seedlings killed before emergence. If it appears in nursery the entire lot of seedling may get destroyed.
To prevent root rot, drench soil with 1% Urea@100gm/10Ltr and Copper oxychloride @250gm/200Ltr water. To control wilt, drench nearby soil with Copper oxychloride@250gm or Carbendazim@400gm/200Ltr of water. Increased temperature and humidity due to watering facilitate fungal growth at roots, to overcome it, apply Trichoderma 2 kg/acre along with cow dung near roots of plants. To control soil born disease, drench soil with Carbendazim@1gm/Ltr or Bordo mix@10gm/ltr, 1 month after that apply 2 kg Trichoderma /acre, mixed with 100kg cow dung.
5)Powdery Mildew: Patchy, white powdery growth appears on lower side of leaves. It parasitizes the plant using it as a food source. It commonly occurs on older leaves just before or at fruit set. But it can develop at any stage of crop development. In severe infestation it causes defoliation.
Avoid water lodging in field. Keep field clean. To control this disease, spraying with Hexaconazole along with sticker @1ml/Ltr of water should be done. In case of sudden rain, chances of powdery mildew is more. Mild infestation takes spray of water soluble sulphur@ 20gm/10Ltr of water 2-3 times with interval of 10 days.