ISSUE 11 July 13, 2006
During the past week (July 5-11), less than 0.2 inches of rain was recorded at NDAWN sites located in most of the region except 0.4 inches at Carrington and Valley City, and 0.85 inches at Streeter. Based on NDAWN estimates, the regionís average daily water use on July 11 ranged from about 0.25 to 0.4 inches for corn, soybean and sunflower. Itís an understatement to mention rainfall continues to be needed across the region.
Winter wheat harvest and barley swathing is beginning in the region. The majority of the regionís spring wheat is in the dough stages and grain yield estimate ranges from 0 (used as forage) to 35-40 bushel per acre. High air temperatures and lack of rainfall are Ďhammeringí yield potential of corn and soybean, due to both crops in stress-susceptible stages. Corn is near or at the tasseling stage. Soybean are in the R2 (full flower) to R3 (initial pod development) stages. Soybean aphids are commonly being found in eastern counties of the region. Insecticide application decisions for soybean aphid are increasingly complicated due to reduced yield potential and the impact of the adverse environment on aphid populations. Sunflower are nearing or are at the R1 (first reproductive) growth stage.
Area Extension Specialist/Cropping Systems
NDSU Carrington Research Extension Center