ISSUE 14 August 4, 2005
During July, the south-central regionís rainfall ranged from 0.6 inches at Carrington to 4.0 inches at Linton, as recorded at NDAWN (North Dakota Agricultural Weather Network) sites. Additional soil moisture generally is needed to maintain yield potential of our corn and beans.
The regionís winter wheat harvest is near completion and small grain harvest is in progress. Winter wheat yields appear to be averaging in the 40- to 50-bushel/acre range, with reports ranging from less than 20 to over 80 bushels/acre. Preliminary reports for barley and spring wheat indicate at least average yield. Barley quality reports generally indicate reduced percent of plump kernels, high protein, and high vomitoxin levels for malt quality. However, spring wheat appears to have adequate test weight and protein. Foliar disease (including tan spot, Septoria, leaf rust, bacterial stripe) and especially scab, plus the high temperatures during the last half of July, have reduced our regionís high early-season yield and quality potential.
Canola swathing is in progress. The regionís corn is in the silking to early-seed formation stages, which is well ahead of last year. For example, during May 1 to August 2 this year at Carrington, corn growing degree day units total 1310, which is about 250 units ahead the same period in 2004. Soybean are in the pod-formation stage. Based on scouting reports, soybean aphid is fairly commonly in the region but at low densities. Sunflower are in bloom and growers should be monitoring for seed-infesting insects including the red seed weevil, which currently are commonly being found during our IPM field visits.
Area Extension Specialist/Cropping Systems
NDSU Carrington Research Extension Center