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Northeast ND (07/02/15)

Information from the Northeast region of North Dakota.

Northeast ND

The past week was been newsworthy for disease and insect discoveries.  Our Nelson County off-station spring wheat plot is striking with stripe rust infection, south of Pekin. The most susceptible varieties have up to 100% infection with over 70% of the leaf surface erupted in stripe rust. At the LREC, cereal leaf beetle was found and we are investigating other regional locations.  Wheat and barley flag leaves will have a window-pane effect from the larva. They eat through the leaf in a linear fashion, just leaving the lower cuticle behind (see Figure 1).

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The Canadian fires’ smoke haze has been present since Sunday. With a break in rainy June weather, hay was cut over the end of the last week through the weekend. The haze is slowing the drying time to a crawl in heavy alfalfa stands. 

For canola, we are entering sclerotinia spray season. The latest from Dr. Luis Del Rio’s plant pathology program is: best spray timing varies according to a farmer’s fungicide selection. For Quadris, apply at 10-25% bloom and all other fungicides at 20-50% bloom The sclerotinia risk map is updated about every 3 days and can be found at https://www.ag.ndsu.edu/sclerotinia/. Most of northeast’s canola country remains at moderate risk for flowering canola.

Lesley Lubenow

Area Extension Specialist/Agronomy

This site is supported in part by the Crop Protection and Pest Management Program [grant no. 2017-70006-27144/accession 1013592] from the USDA National Institute of Food and Agriculture. Any opinions, findings, conclusions, or recommendations expressed are those of the website author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture.

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