Soybean Vein Necrosis of Soybean
Published: 03/19/2019
Symptoms caused by Soybean vein necrosis virus (SVNV) often begin as yellowing near leaf veins that develops into reddish-brown lesions, causing death of leaf tissue. Lesions follow or spread from leaf veins. Leaf veins may limit lesions, resulting in an angular lesion appearance. Clear, yellow, or dark brown discoloration of leaf veins can occur. Browning of veins may be especially noticeable on the leaf underside.
SVNV is vectored by the soybean thrips and possibly other thrips, and hot, dry weather that favors thrips may cause increased disease spread.
Weeds may provide an overwintering host for SVNV; thrips migrating from the south may also carry the virus.
Soybean vein necrosis lesions follow or spread from leaf veins.
Image: A. Sisson
Symptoms of soybean vein necrosis on soybean leaves.
Image: D. Smith
For more information, see the Soybean Vein Necrosis Virus publication.
Gallery Images: D. Smith, D. Mueller, E. Sikora, and A. Sisson
The underside of this soybean leaf shows vein discoloration from soybean vein necrosis.
Thrips nymphs acquire Soybean vein necrosis virus when feeding on infected plants.
Soybean vein necrosis lesions follow or spread from leaf veins.
Early soybean vein necrosis lesion forming.
Later soybean vein necrosis lesions.
Soybean vein necrosis lesions follow or spread from leaf veins.
Symptoms of soybean vein necrosis on soybean leaves.
Hot, dry weather that favors thrips may cause increased disease spread.
Gallery Images: D. Smith, D. Mueller, E. Sikora, and A. Sisson
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