Peanut Mottle and Peanut Stripe Virus Diseases in Thailand and the Philippines. D. V. R. Reddy, International Crops Research Institute for the Semi-arid Tropics, Patancheru, India; S. Wongkaew, Khon Kaen University, Thailand; and R. Santos, Isabela University, Philippines. Plant Disease 69:1101, 1985. Accepted for publication 17 April 1985. Copyright 1985 The American Phytopathological Society. DOI: 10.1094/PD-69-1101a.
A survey of virus diseases of peanut (Arachis hypogaea L.) was undertaken in several regions of Thailand and the Philippines in September 1984. ELISA plates coated with γ-globulins of peanut stripe (PStV), peanut mottle (PMV), and peanut clump viruses (PCV, Ludhiana, Bapatla isolates) antisera were used to test crude leaf extracts from plants suspected of being infected with viruses. Further processing of the plates was done at ICRISAT in India. PMV was detected in peanut plants at several locations in Thailand and the Philippines, with disease incidence ranging from 5 to 50%. In Thailand, PStV was detected in Phitsanulok and in the Khon Kaen area. In the Philippines, PStV was detected in the Los Banos, South Cotabato, Isabela, Lusod, and Roma areas, with disease incidence up to 100%. Symptoms of PStV were often confused with those of PMV (both are potyviruses). PStV apparently is widely distributed in Southeast Asia. PCV was not detected in the areas surveyed in either Thailand or the Philippines.