Highplains disease is a viral disease afflicting wheat and maize. It is caused by the negative-sense ssRNA virusHighPlains wheat mosaic emaravirus. » HighPlains disease of corn is caused by the HighPlains wheat mosaic virus (HPWMoV), which also can infect winter wheat. 100 µM. F I G U R E 1 Symptoms induced by HighPlains wheat mosaic virus (HPWMoV) on corn leaves under field conditions (a) and on wheat leaves infested with HPWMoV-viruliferous mites at 12 and 30 days postinfestation (dpi). 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 HighPlainsvirus (HPV) in greenhouse experiments, but several other grass species were not. Cause The virus that causes this disease is also referred to as wheat mosaic virus, maize red stripe virus, highplains tenui virus or highplainsvirus. In the Western States, it first was confirmed in Idaho in 1993, in Utah in 1994, and in Washington in 1998. Both dent and sweet corn... Wheat mosaic virus (WMoV) (syn. HighPlainsvirus) causes chlorotic streaks and mosaic on corn foliage, and it stunts ear development. Wheat streak mosaic virus (WSMV) and highplainsvirus (HPV) infect wheat, corn, and many other grasses. The diseases caused by these viruses have been observed primarily in the drier areas of Oklahoma, i.e., the panhandle and western OK. Symptoms of highplainsvirus of sweet corn vary widely, but may include weakened root systems, stunted growth and yellowing of the leaves, sometimes with yellow streaks and flecks. The HighPlainsvirus (HPV), which infects corn and other cereals, was first found in 1993 in the United States. Research was initiated in 1995 to investigate the potential for seed transmis-sion of HPV. Scouting for Corn Diseases. Early Season Emergence to knee-high Seeding Blights Anthracnose Leaf Blight, Bacterial Wilt and Bacterial Leaf Blight (Stewart’s Wilt, Stewart’s Disease), Goss’s Wilt, Physoderma Brown Spot, Common Smut, HighPlainsVirus. of sweet corn from Brazil and Chile. Preliminary results of tests tend to suggest. that the HighPlainsvirus occurs in other countries from other parts of the world, but this awaits confirmation. On which plants Maize and wheat (severe symptoms). Interpretive Summary: The HighPlains disease was first reported from the Great Plains states of the USA in 1993 in corn and wheat. The causal agent of this pathogen was initially named as HighPlainsvirus and transmitted by the wheat curl mite. Jensen, S.G. (1994) The HighPlainsvirus- a new threat to corn and wheat production in the West. Proceedings of the 49th Annual Corn and Sorghum Industry Research Conference 1994, 156-164. A PCR method of detecting HighPlains wheat mosaic virus in seed corn. HighPlains wheat mosaic virus, widespread throughout the southwestern Great Plains states, became a worldwide phytosanitary export concern in the second half of 2022.
