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Small Grain Virus Update – NDSU Plant Diagnostic Lab (05/19/16)

Small grain samples, primarily winter wheat, have been arriving at the Plant Diagnostic Lab for virus testing.

Small Grain Virus Update – NDSU Plant Diagnostic Lab

Small grain samples, primarily winter wheat, have been arriving at the Plant Diagnostic Lab for virus testing. Our routine protocol is to test each sample that comes in for wheat streak mosaic virus (WSMV), high plains virus (HPV), cereal yellow dwarf virus (CYDV), and two strains of barley yellow dwarf virus (BYDV). WSMV and HPV are vectored by the wheat curl mite and become problematic when the green bridge was not broken (seeding wheat into volunteer wheat). BYDV is vectored by cereal aphids and risk can be assessed if an early arrival of cereal aphids occurs (see article in last week’s crop and pest report). Visual diagnosis of a viral disease can be difficult as they can mimic abiotic disorders. Therefore, it is important to submit samples for accurate diagnosis.

As of May 18th, WSMV has been detected in samples from Adams, Dunn, Hettinger, McHenry, and Mountrail counties. Samples positive for both WSMV and HPV have been submitted from Dunn and Hettinger counties.

 

Jesse Ostrander

NDSU Plant Diagnostician

 &

Andrew Friskop

Extension Plant Pathology, Cereal Crops

 

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