ISSUE 12 July 30, 2008
Since July 15, the region received rain ranging from 0.4 inch at Pillsbury to 1.9 inches at Wishek, based on NDAWN (North Dakota Agricultural Weather Network). NDAWN daily water use estimate on July 28 for row crops ranged from about 0.1 to 0.25 inches. Timely rains will be needed to support yield potential of our row crops during the next 3-4 weeks.
Winter wheat and barley harvest is underway in the southern portion of this region. Corn is entering the reproductive stage of growth, with many early-planted or early-maturing hybrids in the tassel to silking stages. However, the crop continues be to behind in development compared to previous years. Corn planted on May 1 at Carrington was at about 1065 growing degree day (gdd) units, Linton at 1165 gdd units, and Oakes at 1275 gdd units as of July 28, with these sites at minus 100 to 140 gdd units compared to the 5-year average. Soybean are in the full-flower to pod-formation stages (R2-R4) of development. Most sunflower are in the pre-flower stages (R2-R3).
Leaf disease and scab incidence continues to be low and should have minimal impact on yield and quality of small grain. Soybean aphids generally can be found at low levels in the region, including as far west as McIntosh and Wells counties, as indicated by the Extension IPM field scouting program. Also, rust is present in the regionís sunflower fields, so monitoring for economic levels of the disease, as well as head insects, is recommended during the next 3-4 weeks.
Area Extension Specialist/Cropping Systems
NDSU Carrington Research Extension Center