Crop & Pest Report

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Northeast ND (8/03/17)

Information from the Northeast region of North Dakota.

Barley swathing has started in the region. Winter rye harvest is starting. Spring wheat is color changing. Some growers are intending to move away from glyphosate desiccation this year. This action is to reduce glyphosate resistance pressure. Soybean aphids continue to be the big pest management concern in the northeast. Scout for soybean aphids regularly and re-scout fields after insecticide spray to check for possible resistance or reduced performance of insecticides.

Most of the canola has finished flowering. Now through swathing is a great time to scout for blackleg, sclerotinia or clubroot infections because the tan dead spots contrast the surrounding green plants. In the last week, white mold was found in canola fields.

Last year, a clubroot field survey was done by LREC plant pathology program in seven northeast counties. Cavalier County remains the only county with known clubroot infections. Swathing is a perfect time to look for clubroot on your farm. Check plants which do not cleanly shear off during swathing for clubroot. Pull up roots and inspect for decaying clubs. The clubroot phytoplasma needs water as a part of its lifecycle. Since it’s been dry in 2017, lack of moisture may have reduced the spread of this soil-born pathogen.

Lesley Lubenow

Area Extension Specialist/Agronomy

NDSU Langdon Research Extension Center

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