Nematodes in wheat crop are a growing concern in many parts of India, especially in fields where wheat is grown continuously year after year. These tiny, thread-like worms live in the soil and attack the roots of wheat plants. Even though they are not visible to the naked eye, their damage becomes clear when plants turn yellow, grow poorly, or produce fewer tillers. In severe cases, patches of the field look weak and uneven, reducing overall yield. Controlling nematodes early is important because once they multiply in the soil, they become difficult to manage.
The first step in controlling nematodes in wheat is proper crop rotation. Growing wheat on the same land repeatedly allows nematodes to keep increasing. If possible, farmers should rotate wheat with crops like mustard, chickpea, berseem, or vegetables that do not support nematode multiplication. A gap of even one season can reduce nematode population significantly. Including a non-host crop is one of the most effective, low-cost, and farmer-friendly methods.
Deep summer ploughing is another simple and useful practice. Doing two to three ploughings during peak summer exposes nematodes to high temperatures and sunlight, reducing their numbers naturally. Farmers should irrigate the field lightly before deep ploughing so that the soil becomes soft and easier to turn. This method helps destroy nematode eggs and resting stages present in deeper layers of soil.
Using resistant or tolerant wheat varieties is also helpful. Some improved varieties are bred to tolerate nematode attack and maintain better yield. Farmers can check with local agriculture departments or Krishi Vigyan Kendras for suitable varieties recommended for their region.
Before sowing wheat, applying well-decomposed farmyard manure (FYM) improves soil health and supports beneficial microbes that naturally suppress nematodes. FYM should be added at least a few weeks before sowing so that it gets properly mixed with the soil. Green manuring with crops like sunhemp or dhaincha also helps reduce nematode population because these plants release compounds that check nematode growth.
Seed treatment is another important step. Treating wheat seeds with recommended nematicides or bio-agents protects young seedlings during early growth. Bio-products containing Paecilomyces lilacinus, Pseudomonas fluorescens, or Trichoderma species can be mixed with seeds or applied in the soil. These beneficial microorganisms attack nematode eggs and reduce infestation levels. Using bio-agents is safer for the environment and improves soil quality over time.
Chemical control should be considered only when nematode infestation is very high. Granular nematicides, when applied at sowing time, protect the crop during its early weeks. The chemicals should be applied carefully in the seed furrow and covered properly with soil. Farmers should always follow the recommended dose to avoid crop injury and prevent soil contamination.
Maintaining proper field hygiene is also important. Removing leftover stubble, destroying infected plant roots, and keeping bunds weed-free helps reduce nematode movement. Irrigation management also plays a role; over-irrigation should be avoided because nematodes thrive in moist soil.
In summary, controlling nematodes in wheat requires a combination of practices rather than a single method. Crop rotation, deep ploughing, organic amendments, seed treatment, and use of bio-agents work together to keep nematodes under control. By adopting these simple and practical steps, farmers can protect their wheat crop and ensure better yield and healthier soil for future seasons.
