Causes and Solutions for Yellowing in Soybean Crop
Yellowing in Soybean Crop – Causes and Effective Management
Introduction:
In recent days, yellowing in soybean crops has become a widespread concern across several regions. This issue can be caused by uneven rainfall, waterlogging or drought, shallow or calcareous soils, stem fly infestation, diseases, and nutrient deficiencies. In this blog, we will discuss the major reasons behind yellowing and how to effectively manage the problem.
1. Moisture Deficiency and Soil Structure:
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In districts like Jalna, Beed, Parbhani, Aurangabad, Ahmednagar, Buldhana, and Amravati, soybean crops are suffering due to less rainfall.
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Shallow or sandy soils fail to retain moisture, leading to wilting and yellowing of plants.
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Calcareous soils also drain quickly, affecting nutrient uptake and leading to yellowing.
2. Excess Rainfall and Waterlogging:
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In areas where excess rainfall occurred, waterlogging has resulted in oxygen deficiency around the roots.
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This restricts root activity and nutrient uptake, causing the crop to turn yellow.
3. Stem Fly Infestation (Stem Borer):
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If proper seed treatment or insecticide application wasn’t done, stem fly damage can be significant.
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Cut and inspect at least 20 plants – if more than 2 larvae are found in a single stem, immediate action is required.
Solution:
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Spray Ravadi or Rage insecticide for effective control.
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Provide foliar nutrition to support recovery.
4. Charcoal Rot Disease:
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Previously this disease appeared after 40–50 days of growth, now symptoms are visible as early as 30 days.
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Symptoms: blackening near the root zone and yellowing upward along the stem.
Preventive Measure:
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Before rainfall, apply Tricoboost DX at 500g per acre to the soil to suppress fungal spread.
5. Herbicide Shock:
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If herbicides are applied in dry conditions, leaf burning and yellowing can occur due to stress.
Solution:
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Spray Shock-Ab along with 19:19:19 NPK or other balanced foliar nutrition to support plant recovery.
6. Yellow Mosaic Virus (YMV):
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Widespread in regions like Partur Taluka of Jalna.
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Spread by whiteflies and leafhoppers.
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Symptoms: yellow patches on leaves, stunted growth, and isolated yellowing in the field.
Control Measures:
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Target all life stages of whiteflies (eggs, nymphs, adults).
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Spray Odhachi Extra for broad-spectrum protection.
7. Micronutrient Deficiency in Calcareous Soils:
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High calcium in calcareous soils inhibits absorption of micronutrients like zinc and iron.
Solution:
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Foliar spray of Zinc EDTA 20g + Ferrous EDTA 20g in 15 liters of water ensures immediate correction of deficiencies.
Conclusion:
Yellowing in soybean is a complex issue triggered by multiple factors—soil type, weather conditions, pests, diseases, and nutrition. Timely identification and targeted action using trusted solutions like Booster® products and balanced nutrition can effectively protect the crop and improve yield.
Act quickly – prevent crop loss and ensure healthy harvest!