Coconut Palm Weevil

📖 Description

Rhynchophorus ferrugineus, the Red Palm Weevil, is one of the most destructive pests of palms worldwide and the single most economically important biotic threat to India’s coconut industry. India is the world’s third-largest coconut producer (over 22 billion nuts per year) with plantations covering over 2 million hectares primarily in Kerala (50 % of national area), Karnataka, Tamil Nadu, Andhra Pradesh, and the coastal tracts of Maharashtra and Goa. The pest is native to South and Southeast Asia but has been spread globally through the ornamental palm trade — it is now established in the Middle East, Mediterranean basin, the Caribbean, and parts of the United States, where it has devastated ornamental and date palm plantings. The female weevil deposits eggs in wounds or in the soft tissue at the base of palm fronds; the emerging larva — the notorious ‘palm worm’ — bores into the palm crown and feeds internally on the soft meristematic tissue for 2–4 months. The damage is largely internal and not visible externally until the crown has been substantially destroyed — by which point the palm is usually beyond saving. This biological feature makes the pest uniquely difficult to detect at the early stage when treatment is most effective. Pheromone-based mass trapping of adults has emerged as the foundation of area-wide management, supplemented by plantation sanitation, careful wound avoidance, and early treatment of detected infestations. The Coconut Development Board of India and ICAR-CPCRI Kasaragod have developed comprehensive IPM packages that combine all these tactics, and area-wide suppression programmes have been successfully implemented in Kerala’s Kasaragod district and Karnataka’s Dakshina Kannada district.