Authors
Dallas L.
Seifers
,
Associate Professor, Kansas State University, Agricultural Research Center-Hays, Hays 67601-9228
;
Tom L.
Harvey
,
Professor, Department of Entomology, Kansas State University, Manhattan 66506
;
T. J.
Martin
,
Professor, Kansas State University, Agricultural Research Center-Hays
; and
Stanley G.
Jensen
,
USDA-ARS, University of Nebraska, Lincoln 68583-0722
ABSTRACT
Barley (Hordeum vulgare), cheat (Bromus secalinus), corn (Zea mays), oat (Avena sativa), rye (Secale cereale), and wheat (Triticum aestivum) were infected by a Kansas isolate of the High Plains virus (HPV) in greenhouse experiments, but several other grass species were not. Infection of a host was dependent upon wheat curl mite numbers. Although both green foxtail (Setaria viridis) and yellow foxtail (S. glauca) are found naturally infected by HPV, only yellow foxtail could be infected in greenhouse experiments. Field sampling (1994 to 1996) of symptomatic yellow foxtail showed that it is a good indicator of the presence of HPV, with 252 of 278 symptomatic plants testing positive in enzyme-linked immunosorbent assay (ELISA) for HPV, 2 of 278 for American wheat striate mosaic virus, and 1 of 278 for johnson grass mosaic virus, whereas 23 of 278 symptomatic plants were negative for all viruses tested by ELISA and were not infectious in back-assays.
