ISSUE 9 July 10, 2008
During the past week (July 2-8), the region received rain ranging from less than 0.1 inch at Edgeley and Oakes to 1.5 inch at Dazey, based on NDAWN (North Dakota Agricultural Weather Network). Most areas received at least one-half inch of rain, which will help preserve potential for good seed yield and quality in small grain.
The regionís corn is rapidly gaining height but continues be to behind in development. Corn planted on May 1 at Carrington was at 710 growing degree day (gdd) units, Linton at about 740 gdd units, and Oakes at 860 gdd units as of July 8, with all sites minus 90 to 130 gdd units compared to the 5-year average. Soybeans are near or at flowering and sunflower are nearing the reproductive stage (R1). Many dry bean fields are in poor condition due to plant establishment challenges (e.g. dry and cool soils at planting time, soil herbicide injury, and root disease).
Wheat foliar diseases are present but continue to be at low incidence. NDSUís disease forecasting models indicate continued risk for tan spot in wheat. For example, at Carrington, the model indicated risk of tan spot infection each day from July 1 to 7. Scab risk continues to be low. Small grain aphids are present but are not an economic concern due to low densities and advanced crop stages. Wheat stem maggot injury is now appearing in the crop. Soybean aphids have been found at low levels in the region including Barnes, Dickey and LaMoure counties.
Area Extension Specialist/Cropping Systems
NDSU Carrington Research Extension Center