1.Bacterial Wilt: Pseudomonas solanacearum
Yellowing of the foliage and finally collapse of the entire plant
Lower leaves may droop first before wilting occurs.
The vascular system becomes brown.
Bacterial ooze comes out from the affected parts.
Plant show wilting symptoms at noontime will recover at nights, but die soon.
Pant samrat variety is tolerant.
Crop rotation with cruciferous vegetables such as cauliflower
Fields should be kept clean and effected parts are to be collected and burnt.
Spray Copper fungicides to control the disease (2% Bordeaux mixture.)
The disease is more prevalent in the presence of root knot Nematodes, so control nematodes .
2.Cercospora Leaf Spot :Cercospora solani
The leaf spots are characterized by chlorotic lesions, angular to irregular in shape, later turn grayish-brown with profuse sporulation at the centre of the spot.
Leaves drop off prematurely, resulting in reduced fruit yield.
Pant Samrat variety is resistant to both the leaf spots.
Diseases can be managed by growing resistant varieties.
Spraying 1 per cent Bordeaux mixture or 2 g Copper oxychloride or 2.5 g Zineb per litre of water effectively controls leaf spots
3.Alternaria leaf Spot :Alternaria melongenae
Cracks appearing in leaf spot
The two species of Alternaria occur commonly, causing the characteristic leaf spots with concentric rings.
A. melongenae also infects the fruits causing large deep-seated spots.
The infected fruits turn yellow and drop off prematurely.
4.Damping off: Pythium aphanidermatum
Sudden collapsing of the seed lings occur in the seed bed.
The seedlings are attacked at the collar region
The disease spreads through fungi present in the soil.
5.Tobacco mosaic virus (TMV)
Mottling of leaves and stunting of plants
Infected leaves are deformed, small and leathery.
Very few fruits are produced on infected plants.
Plants infected early remain stunted.
Destroy all weeds and avoid planting cucumber, pepper, tobacco, tomato
Wash hands with soap and water before working in seed beds.
Prohibit smoking or chewing of tobacco who are handling brinjal seedlings.
Spray insecticides like Dimethoate 2 ml/litre or Metasystox 1 ml/litre of water to control the insect vector
5.Collar rot: Sclerotium rolfsii
The disease occasionally occurs in serious form.
Decortications is the main symptom.
Near the ground surface on the stem may be seen the mycelia and sclerotia.
Seed treatment with 4 g of Trichoderma viride formulation per kg seed
Spraying with Mancozeb @ 2g/Litre of water.
Collection and destruction of diseased parts and portions of the plant.