Weed Hosts of Rice Necrosis Mosaic Virus. S. K. Ghosh, Scientist, Division of Plant Pathology, Central Rice Research Institute, Cuttack 753006, Orissa, India. Plant Dis. 65:602-603. . This article is in the public domain and not copyrightable. It may be freely reprinted with customary crediting of the source. The American Phytopathological Society, 1981. DOI: 10.1094/PD-65-602.

Rice necrosis mosaic virus was transmitted by sap inoculation and through soil to two weeds, Ludwigia perennis and Brachiaria ramosa. The virus was recovered from these weeds and transmitted to rice plants. The inner epidermal layer of the sheath of infected B. ramosa showed granular, oval, intracellular X-bodies, 5.2–7.8 × 5.9–10.4 µm. Natural infection of these weeds in the field further supported their role as hosts of the virus.

Keyword(s): alternate hosts.