Bengal gram (chickpea) is a strong crop, but many farmers face two common problems in the field: yellowing of plants and damage by larvae. When these two problems occur together, the crop becomes weak, flowering reduces, and pods are damaged, leading to heavy yield loss. The good point is that both problems can be managed well if we understand the real reasons and take timely action. Yellowing is usually a sign of stress in the plant, while larvae are direct pests that eat flowers and pods. Both need different solutions.
Yellowing in Bengal gram can happen for several reasons. One common reason is moisture stress. Chickpea is often grown on residual moisture, and if the soil becomes too dry during branching or flowering, plants turn pale and weak. On the other side, waterlogging after winter rains also causes yellowing because roots cannot breathe. In such cases, plants look yellow in patches, and growth becomes slow. The solution is proper moisture management—avoid standing water by making drainage channels, and if irrigation is available, give one light irrigation at flowering and another at pod formation to reduce stress.
Nutrient deficiency is another major cause. Nitrogen deficiency can cause pale yellow colour, but chickpea also depends on healthy root nodules to fix nitrogen. If nodulation is poor, the plant lacks nitrogen and turns yellow. Poor nodulation happens when seed is not treated with Rhizobium culture, soil is low in organic matter, or moisture is either too low or too high. Phosphorus deficiency also causes weak growth and poor root development, leading to pale plants. Micronutrients like zinc and iron may cause yellowing in alkaline soils. Managing this means using balanced fertilizer, adding compost or FYM, and treating seed with Rhizobium before sowing. If deficiency symptoms appear in the standing crop, a suitable foliar spray can give quick improvement, but long-term correction needs soil improvement.
Yellowing can also be due to diseases, especially wilt and root rot. Wilt causes sudden yellowing and drying of plants, often in patches. When you pull an affected plant, the roots may look brown, and the plant may break easily. Root rot is common when drainage is poor. Disease management starts with prevention: use healthy seed, follow crop rotation, avoid repeated chickpea in the same field, and ensure good drainage. Remove and destroy severely affected plants so the disease does not spread.
Now coming to larvae problem, the most damaging larva in Bengal gram is pod borer (often called Helicoverpa). This caterpillar attacks flowers and pods. Farmers may see holes in pods, damaged seeds, and greenish-brown larvae hiding inside the canopy. Sometimes, farmers notice flower drop and think it is due to weather, but actually larvae are feeding on flowers. Larvae problems increase when the crop is dense, weeds are present, and monitoring is not done on time.
Management of larvae starts with regular scouting. Check the crop at least twice a week from flowering stage. Look for eggs on leaves, small caterpillars, and damaged flowers or pods. Early control is easier and cheaper than controlling big larvae. Keep the field clean by removing weeds, because weeds can host the pest.
Cultural practices also help reduce larvae attack. Timely sowing helps the crop escape peak pest activity in some areas. Avoid excess nitrogen because it makes the crop very soft and attractive to insects. Maintain proper spacing so air and sunlight reach inside the canopy.
For biological management, many farmers use safe options like neem-based sprays or biopesticides. These work best on small larvae. Encourage natural enemies by avoiding unnecessary broad-spectrum insecticides. Bird perches can also help, because birds feed on caterpillars.
If larval population is high and damage is increasing, chemical control may be needed. Spray should be done at the right time, targeting early larval stage. Ensure good coverage inside the canopy where larvae hide. Rotate insecticides from different groups if repeat sprays are needed, to avoid resistance.
In simple terms, yellowing in Bengal gram usually happens due to moisture stress, nutrient deficiency, poor nodulation, or root diseases. Larvae problems mainly come from pod borer feeding on flowers and pods. Manage yellowing by improving drainage, giving timely irrigation, using balanced nutrition and seed treatment, and preventing wilt. Manage larvae by regular monitoring, clean field practices, early neem or biological sprays, and timely need-based insecticide with good coverage. When both problems are controlled early, the crop stays greener, sets more pods, and gives better yield.
