Young groundnut plants are stunted and bushy, leaves have ring and mottle patterns and the growing buds turn brown and die. Some plants are dwarfed badly. Thrips are around. AP. What disease?
2 Answers
Stunted bushy plants with ring and mottle patterns and dying browned buds, with thrips present, is bud necrosis disease, a tospovirus spread by thrips. The virus cannot be cured in an infected plant, so the plan is to limit thrips spread and reduce the source. Rogue out early infected plants when few. Manage thrips with a recommended insecticide and blue or yellow sticky traps, and avoid leaving gaps that let thrips settle, so timely close spacing and a border crop help reduce spread. Early sowing within the recommended window and a higher plant population reduce final disease, since late thin crops suffer most. For next season choose a tolerant variety where available. Follow label dose and PHI and confirm the disease and thrips management with your KVK or ICAR Directorate of Groundnut Research, Junagadh, or RARS Anantapur for your dry belt.
In Anantapur sowing on time with proper plant population reduced bud necrosis for me. The late sown thin plots always got it badly.