The correct answer is Bajra. Explanation & Key Takeaways: • Green ear disease is a fungal disease caused by Sclerospora graminicola, primarily affecting Bajra (Pearl Millet). • This disease is characterized by the greenish, malformed, and proliferated ear heads in Bajra crops, leading to significant yield loss. • Bajra is a widely cultivated cereal crop in semi-arid regions, and it is particularly vulnerable to green ear disease, especially during the rainy season. • The disease spreads rapidly under favorable conditions such as high humidity and moderate temperatures, particularly between 25°C to 30°C. • Management of green ear disease involves integrated approaches such as using resistant Bajra varieties, crop rotation, and fungicides like metalaxyl. • The disease mainly impacts grain production and quality, thereby affecting farmers' incomes and food security in regions dependent on Bajra cultivation. Related Concepts: • Bajra (Pearl Millet): • Bajra is an important cereal crop cultivated in regions like India, Africa, and Southeast Asia for its adaptability to arid and semi-arid climates. • It is a rich source of nutrients such as protein, fiber, iron, and magnesium, often consumed as bread, porridge, or fermented beverages. • The leading producers of Bajra include India, Nigeria, and Niger, with Rajasthan being the largest producing state in India. • Other crops mentioned: • Beetroot: A root vegetable grown in temperate climates, primarily used for culinary and medicinal purposes. It is not affected by green ear disease. • Potato: A tuber crop widely cultivated globally. Diseases like late blight are common, but green ear disease does not affect potatoes. • Carrot: Another root vegetable rich in vitamins like Vitamin A. Carrots are susceptible to bacterial and fungal diseases but not green ear disease. • Management of Green Ear Disease: • Use of resistant Bajra varieties such as ICTP 8203 and MH-179. • Crop rotation with non-host crops to reduce pathogen buildup in the soil. • Application of fungicides like metalaxyl and seed treatment with systemic fungicides. • Maintaining proper field sanitation and avoiding dense planting to reduce humidity levels. • Importance of Bajra: • Bajra plays a significant role in ensuring food security in regions with harsh climatic conditions. • It is a drought-resistant crop and contributes to sustainable agriculture practices. • Its nutritional benefits make it a staple food for millions, especially in rural areas. Important Notes: • Identification: Green ear disease in Bajra is identifiable by the presence of malformed ear heads with a greenish appearance. • Economic Impact: The disease can cause significant yield losses, which directly affect farmers' livelihoods. • Environmental Factors: High humidity and temperatures between 25°C and 30°C are conducive to the spread of the disease. • Integrated Disease Management: Combining resistant crop varieties, fungicides, and cultural practices is the most effective way to combat green ear disease.