What Causes Blank Pod in Chickpea and Groundnut
Chickpea and groundnut are two very important crops grown widely in India. Farmers depend on these crops for both home use and market sale. However, one common problem seen in both crops is blank pods. A blank pod is a pod that forms normally from outside but does not contain a seed inside. This reduces the overall yield. A plant may look healthy, but blank pods can still occur and reduce profits. Understanding the causes of this problem is the first step toward preventing it.
What is a Blank Pod?
A blank pod is a pod that has developed after flowering but does not carry any grain or nut inside. The outer shell remains empty because the seed inside failed to grow. This can happen at various stages of crop development.
Causes of Blank Pod in Chickpea
Poor Pollination and Fertilization
Pollination is needed to form seeds inside the pods. If flowers do not get pollinated properly, pods develop but remain empty. Factors like cloudy weather, high humidity, or temperature fluctuations can affect pollination.
Moisture Stress (Too Little or Too Much Water)
Chickpea requires moderate moisture, especially at flowering and pod formation stages. If the soil becomes too dry at this stage, the plant cannot supply enough nutrients to developing seeds. On the other hand, excess water causes root damage and reduces nutrient supply.
Nutrient Deficiencies
Lack of essential nutrients like phosphorus and boron can result in poor seed formation. Phosphorus supports root growth and seed development, while boron helps in pollination and fertilization.
Pest and Disease Attack
Helicoverpa (pod borer) feeds on developing pods and seeds. Even if the pod remains, the seed inside may get eaten. Root rot diseases can also weaken plants and prevent proper nourishment of pods.
Causes of Blank Pod in Groundnut
Improper Pegging Conditions
After flowering, groundnut produces a peg that enters the soil to form pods. If the soil is hard, dry, or compact, pegs cannot penetrate properly. This results in blank pods or no pod formation at all.
Moisture Stress During Critical Stages
Groundnut needs water when pegging and pod filling takes place. Water stress during these stages is a major cause of empty pods.
Imbalanced Nutrition
Calcium deficiency in the soil is one of the main reasons for blank pod in groundnut. Calcium is required for pod and kernel development. If calcium is not available in the pegging zone, pods form but seeds do not.
Pest and Disease Problems
Termites, root grubs, and fungal diseases weaken plants and reduce their ability to fill seeds. White grub attacks reduce root strength and nutrient uptake, leading to blank pods.
Conclusion
Blank pod formation in chickpea and groundnut is mainly influenced by poor pollination, moisture stress, nutrient imbalance, and pest attacks. To reduce this problem, farmers should ensure proper irrigation at flowering and pod formation stages, maintain adequate soil nutrients (especially phosphorus, boron, and calcium), use recommended pest management practices, and improve field conditions to support healthy plant growth. Regular crop monitoring and timely action can help farmers achieve better yield and prevent loss due to blank pods.
