Previous View
 
APSnet Home
 
Phytopathology Home


VIEW ARTICLE

Ecology and Epidemiology

Seed Transmission of Peanut Mottle Virus in Peanuts. D. B. Adams, Department of Plant Pathology, University of Georgia, Athens, GA 30602, Present address: Cooperative Extension Service, Rural Development Center, Tifton, GA 31794; C. W. Kuhn, Plant Genetics, University of Georgia, Athens, GA 30602. Phytopathology 67:1126-1129. Accepted for publication 21 March 1977. Copyright 1977 The American Phytopathological Society, 3340 Pilot Knob Road, St. Paul, MN 55121. All rights reserved.. DOI: 10.1094/Phyto-67-1126.

Seed transmission of peanut mottle virus (PMV) in peanuts is a consequence of embryo infection. Virus was isolated from embryos but not from seed coats or cotyledons. Four isolates of PMV differed in frequency of seed transmission in Starr peanut: M1 = 0.3%, M2 = 0.0%, M3 = 8.5%, and N = 0.0%. Isolate M3 was transmitted at similar frequencies (average = 7.1%) in seed of four peanut cultivars. Isolate M2, however, was not seed-transmitted in large-seeded peanuts although it was transmitted at a low frequency (0.23%) in small-seeded ones. When seed were harvested from individual plants, seven of 30 peanut plants produced 777 seed free of PMV-M3 whereas the seed transmission varied from 0.5 - 8.3% of the remaining plants. Seed transmission of PMV was unrelated to the level of virus in leaves and flowers. When peanut plants were maintained at 21 or 35 C during flowering and pegging, seed transmission was reduced threefold when compared to greenhouse-grown peanuts.

Additional keywords: epidemiology, primary source of inoculum.