Crop & Pest Report

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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

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