A network that helps people worldwide obtain rapid advice and information on crop protection, including the identification and management of plant pests.
PestNet is a network that helps people worldwide obtain rapid advice and information on crop protection, including the identification and management of plant pests. It started in 1999. Anyone with an interest in plant protection is welcome to join. PestNet is free and is moderated, ensuring that messages are confined to plant protection.
August 2007. An unidentified papaya disease in Sri Lanka. One variety of papaya (purple colour petioles) showed apical necrosis, among several varieties grown in the same field. Initially, uppermost leaves wilt with marginal necrosis, fall, leaving the bare trunk, which later dies. Brown spots and brown ringspots develop on fruits of affected plants.
Affected plants were tested for Papaya Ring Spot Virus (PRSV) by ELISA (Agdia chemicals) resulting negative reaction. No fungal of bacterial pathogens were not detected. Application of fungicides against this disease have failed. With reference to compendium of papaya diseases and internet sites, the symptoms are somewhat similar to Papaya Droopy Necrosis and Papaya Apical Necrosis Viruses.
The Global Plant Clinic offered to look at samples.