[University of Arkansas Division of Agriculture Research and Extension
University of Arkansas System. Arkansas Soybean Promotion Board. Dr. Ioannis E.
Tzanetakis, Assistant Professor, Plant Virology, Department of Plant Pathology,
University of Arkansas]
"Through work done at the University of Arkansas,
plant pathologist Ioannis Tzanetakis has identified a new virus which is
called Soybean Vein Necrosis Virus. The researchers now have proof that the
virus causes the disease Soybean Vein Necrosis.
Early signs of Soybean Vein Necrosis are usually
found around the middle of June, with the first visible symptoms being a
yellowing along the main vein of the leaf. As the season progresses that
yellowing will then become necrosis and the leaves will begin to die off. And
depending on the cultivar there may be a partial necrosis or the whole leave may
Obviously this has a major impact on
photosynthesis and the nutrients that go to the seed. Therefore it may have an
effect on the yield, depending on the time and how wide spread the symptoms are
on the plant. Once the virus is in the plant there is not a cure. Therefore
there is no need to apply any fungicide as they will not have any effect on the
disease. Where as it is important to identify the virus in the field to minimize
the spread by Soybean thrips.
For more information on the soybean vein necrosis
virus and disease please contact your county agent or visit us on the web at: www.uaex.edu.
[www.uaex.edu. University of Arkansas Division of Agriculture Research and
Extension University of Arkansas System. Arkansas Soybean Promotion Board]