Panama Disease

News: Scientist from The University of Queensland identified a genomic region that provides resistance to Fusarium wilt Subtropical Race 4 (STR4).

About Panama Disease

• Panama disease, also called banana wilt, is a destructive plant disease that affects banana crops.
• Caused by: Soil-dwelling fungus (Fusarium oxysporum f. sp. cubense), especially its virulent Tropical Race 4 (TR4) strains.
• Global Distribution: It specifically impacts the Cavendish banana (G9 Banana cultivars) across Asia, Australia, the Middle East, and Africa.
  • Note: In India, over 60% of banana cultivation consists of the G9 variety.
  • Farmers in states like Bihar, Gujarat, Madhya Pradesh, and Uttar Pradesh get severely impacted by Panama disease.
• Infection Process: The fungus enters young roots, often through wounds. It spreads through the plant’s vascular tissues, blocking water flow. The fungus survives in soil for many years, making replanting difficult.
• Symptoms: Yellowing at edges of older leaves, leaf wilting and collapse, brown or black discoloration inside stems and eventual death of the plant.
• Control Challenges: Soil fungicides and fumigation are largely ineffective. Bananas are sterile and grown clonally, so breeding resistant varieties is difficult.
• Best Long-Term Solution: Developing and planting disease-resistant banana cultivars remains the most effective strategy.