Studies on mosaic disease of soybean variety JS-335

Mosaic disease of soybean [Glycine max (L.) Merrill] was observed on variety JS-335 in Rahuri producing vein clearing, puckering, mottling, distortion of leaves, leaf curling and stunting of plant. The virus had limited host range with various symptoms. Necrotic local lesions were induced in Lablab purpureus while chlorotic local leasions in Chenopodium amaranticolor and C. quinoa. The virus gets transmitted by four aphid species viz., Myzus persicae, Aphis craccivora, Aphis glycines and Aphis gossypii. The virus has in vitro longevity of 96 hours at room temperature, dilution end point between 10⁻⁴ to 10⁻⁵ and thermal inactivation point between 65 to 70° C. Purified virions consisted of flexous rods, 746–759 nm in length and 14–17 nm in breadth. Studies further indicated that virus under study belonged to Potyvirus group.