Brinjal, also known as eggplant or baingan, is one of the most commonly grown vegetables in India. It grows well in many regions and provides good income to farmers. However, like other vegetable crops, brinjal is often affected by soil-borne fungal diseases, especially root fungus. This problem weakens the plants, reduces yield, and can even destroy the entire crop if not controlled in time. Managing root fungus early and using proper preventive measures can help farmers maintain healthy brinjal fields and better harvests.
1. What is root fungus?
Root fungus refers to a group of soil-borne fungal diseases that attack the roots and lower stem of plants. Common fungi that cause this problem in brinjal include Fusarium, Rhizoctonia, and Pythium species. These pathogens survive in the soil for many years and infect plants through injured or weak roots.
The disease is more severe in poorly drained, waterlogged soils and when the same crop or related crops like tomato and chilli are grown repeatedly in the same field.
2. Symptoms of root fungus
Farmers can easily identify root fungus by observing the following signs:
Yellowing and drooping of lower leaves.
Stunted or slow growth of plants.
Wilting during the day, even when soil moisture seems sufficient.
Brown or black discoloration on roots and collar region.
Roots appear rotted, soft, or hollow when pulled out.
In severe cases, the entire plant dries up and dies.
If the disease is not controlled early, it can spread quickly from one plant to another through irrigation water or soil movement.
3. Preventive and cultural measures
Prevention is the best way to manage root fungus because it is difficult to cure once it becomes severe. Farmers should follow these steps:
Crop rotation: Avoid growing brinjal, tomato, chilli, or other solanaceous crops continuously in the same field. Rotate with cereals or pulses for at least 2–3 years.
Soil preparation: Ensure good drainage and avoid water stagnation. Raised beds help prevent excess moisture around roots.
Use healthy seedlings: Always use disease-free, well-grown seedlings from a clean nursery.
Soil solarization: In nursery beds, cover moist soil with transparent plastic sheets for 3–4 weeks in summer before sowing. This kills many harmful fungi in the topsoil.
Organic amendments: Mix well-decomposed farmyard manure or compost in the soil. This encourages beneficial microbes that suppress fungal growth.
4. Biological control
Use biofungicides like Trichoderma harzianum or Trichoderma viride during transplanting. These beneficial fungi protect roots by competing with disease-causing fungi. Mix 1–2 kg of Trichoderma culture with 50 kg of compost and apply it in the field or nursery before planting.
Seeds or seedlings can also be dipped in a Trichoderma suspension for 30 minutes before transplanting.
5. Chemical control
When infection appears in patches, apply a drenching of fungicides such as carbendazim, mancozeb, or metalaxyl around the root zone. Use the recommended dose as per local agricultural guidelines. Avoid excessive spraying—drench only the affected area to protect soil health.
6. Additional tips
Do not overwater the crop; keep soil moist but not soggy.
Remove and destroy severely infected plants to stop the spread.
Disinfect tools used in infected areas before using them elsewhere.
Conclusion
Root fungus in brinjal can cause serious losses if ignored, but it can be effectively managed through a combination of preventive practices, biological treatments, and need-based fungicide use. Good soil drainage, crop rotation, and healthy seedlings are key to preventing the disease. By following these simple steps, farmers can protect their brinjal crop, maintain soil health, and secure a higher yield with better-quality fruits.
