NDSU Crop and Pest Report


ISSUE 16  August 21, 2003

South-Central ND

During August 1-19, total rainfall recorded at NDAWN (North Dakota Agricultural Weather Network) sites in the region ranged from 1.5 inches at Linton to less than 0.1 inch at Jamestown and Tappen. The region’s estimated crop daily water use on August 19: corn (May 15 emergence), soybean (May 22 emergence), dry bean (June 5 emergence) and sunflower (June 5 emergence) = 0.20 to 0.28 inch. Water use data is available at the following NDAWN website:


Rainfall is needed for corn, soybean, dry bean, and sunflower although it would delay the remaining small grain harvest.

Small grain harvest is nearing completion south of I94 and is about 65 to 75% complete north of I94. Grain yield and quality are good to excellent. Yield appears well above average with 45 to 60 bushels/acre HRS wheat commonly reported. Spring wheat yield of 80 bushels/acre and winter wheat yield of over 100 bushels/acre have been reported. Barley is ranging from 70 to 100 bushels/acre. Canola and flax combining also are in progress. Dry bean are rapidly approaching maturity. Corn is in the blister to dough stages, soybean in the seed-fill stage (R5), and sunflower is in the late-flowering (R5) to ray flower wilting (R6) stages.

Greg Endres
Area Extension Specialist/Cropping Systems
NDSU Carrington Research Extension Center


Southwest ND

Heat and dry weather continue to plague southwest North Dakota. Nearly every day this past week, high temperatures at the NDAWN stations in southwest North Dakota were 90o F or above. The exception was at Bowman on August 18 when their high was 88o F. At Mott temperatures of 100o F and above were recorded four days in a row. Rainfall was highly variable. The NDAWN location at Beach recorded 0.81 inches while at Hazen, Hettinger, and Mandan locations no precipitation was reported. Some localized areas did receive substantial rainfall Monday evening and early Tuesday morning. At Dutch Henry Butte 4.15 inches was received.

The warm dry weather has pushed harvest along. Harvesting of late seeded spring wheat has begun and yields from these fields have been reported to be well below early seeded spring wheat fields. Corn and sunflowers in some areas are showing severe stress from the lack of moisture. Last week’s scouting report indicated that 40% of the sunflower fields surveyed in southwest North Dakota had 9 or more red sunflower seed weevils per head. One field in Grant County had over 90 red sunflower seed weevils per head.

Winter wheat variety results are available on the Dickinson Research Extension Center web page,


Click on Agronomy and then select variety trial information. Also producers may request a copy of the results from their county extension agent or the Dickinson Research Extension Center.

Roger Ashley
Area Extension Agronomist
Dickinson Research Extension Center

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