Crop & Pest Report


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Northwest ND (09/24/20)

Information from the Northwest region of North Dakota.

The morning of September 8th brought a hard frost to most of Northwest ND. Low temperatures ranged from 17° at Alamo to 26° at Williston with most NDAWN stations showing lows in the mid 20’s. Most unharvested crops in drought stricken areas were already mature and drying down, so frost damage is expected to be minimal. However, I have heard from farmers in eastern Williams County and other pockets that had more moisture this season that their soybeans got hit. Later-planted soybean and soybeans still filling pods were at the most risk of damage. At the Williston REC, soybean was already dropping leaves when the frost came due to the dry conditions.

Harvest of small grains, pulses, and canola is nearly complete. Farmers now are waiting for any soybean they have to dry down. There are not a lot of crops left in the field as the dry conditions have facilitated harvest. As of two weeks ago, much of Northwest ND was downgraded to Moderate Drought and a swath of Divide and Northwest Williams Counties was downgraded to Severe Drought according to the US Drought Monitor. Less than 0.5” has fallen in most of western Divide, Williams, and McKenzie Counties since early August. Despite the frost over Labor Day weekend, warmer than normal temperatures for September have been consistent with high’s in the mid-60’s to upper 70’s.

Farmers are encouraged to start making their plans for fall burndown applications now and get them out soon. The dry conditions have reduced emergence of troublesome winter annuals like narrow leaf hawksbeard and horseweed, but the few showers that moved through on the 20th and possibly again tonight should stimulate germination. For controlling hawksbeard, don’t rely on glyphosate alone! Use a combination of glyphosate, 2,4-D, and Express or Panoflex to maximize control. For those putting out Valor for residual control, waiting until early to mid October will help extend its activity as long into the spring as possible.

ats.narrow leaf hawksbeard


Clair Keene

Extension Cropping Systems Specialist

NDSU Williston Research Extension Center

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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