Submitted to: American Phytopathological Society Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 5/22/2003
Publication Date: 6/1/2003
Citation: Kennedy, G.G., Groves, R.L., Walgenbach, J.W., Moyer, J.M. 2003. Thrips and epidemiology of tomato spotted wilt.Phytopathology. 93(6):S115. Abstracts.
Technical Abstract: Investigations of the sources, vectors and timing of spread of Tomato spotted wilt tospovirus (TSWV) in tobacco, pepper and tomato in North Carolina since 1995 have identified the primary vector in most years as Frankliniella fusca, with Frankliniella occidentalis being locally important in some years. Additionally, Thrips tabaci may be locally important in spread of selected isolates in certain crops. TSWV overwinters most commonly in a relatively few abundant winter annual weeds. Inoculum levels increase by spread among winter weeds during late winter and early spring, before the weeds senesce forcing infectious thrips to disperse. These dispersing thrips inoculate both crops and summer annual weeds during a relatively brief period in spring. Re-infection of newly emerged winter annual weeds occurs most commonly in late October and November in response to senescence of summer annual weeds.