A Persistent Aphidborne Virus of Soybean, Indonesian Soybean Dwarf Virus. M. Iwaki, Plant Pathologist, Pests and Diseases Division, Central Research Institute for Agriculture, Bogor, Indonesia. M. Roechan, Assistant Plant Pathologist, and H. Hibino, Plant Pathologist, Pests and Diseases Division, Central Research Institute for Agriculture, Bogor, Indonesia; H. Tochihara, Plant Pathologist, Institute for Plant Virus Research, Yatabe, Tsukuba, Ibaraki, 305, Japan; and D. M. Tantera, Plant Pathologist, Pests and Diseases Division, Central Research Institute for Agriculture, Bogor, Indonesia. Plant Dis. 64:1027-1030. Copyright 1980 American Phytopathological Society. DOI: 10.1094/PD-64-1027.

Indonesian soybean dwarf virus (ISDV) is distributed widely in Indonesia. Infected soybean plants show upward curling and rugosity of leaves and dwarfing with shortened petioles and internodes. ISDV infected only soybean among 22 plant species in six families tested and was transmitted by the aphid, Aphis glycines Matsumura, in a persistent manner but not by plant sap inoculation. Minimum acquisition and inoculation feeding periods by aphids for virus transmission were 6 hr and 1 hr, respectively. Partially purified virus preparations from infected soybean plants contained spherical particles, about 26 nm in diameter. In ultrathin sections, crystalline aggregates of spherical particles were observed in vacuoles of phloem cells of infected plants. ISDV did not show any relationship to soybean dwarf virus in serologic and cross protection tests.