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Filiform Enations in Virus-Infected Soybeans. S. S. Quiniones, Graduate Assistant, and Research Plant Pathologist, Crops Research Division, ARS, USDA, Iowa State University, Ames 50010; J. M. Dunleavy, Professor, Department of Botany and Plant Pathology, Iowa State University, Ames 50010. Phytopathology 61:763-766. Accepted for publication 1 February 1971. DOI: 10.1094/Phyto-61-763.

Filiform enations were produced in 4 of 14 soybean cultivars by double infections of soybean mosaic virus and bean pod mottle virus. The enations developed 3 to 5 weeks after inoculation from the midrib of the trifoliolate leaves and were 0.5-2.5 cm long, 1 mm wide at the base, and tapered at tips. Enations produced synergistically by two unrelated viruses have not been reported previously. Both viruses occur together in naturally infected soybeans in Iowa.

Additional keywords: synergism.