NDSU Crop and Pest Report


ISSUE 12  July 17, 2003

South-Central ND

During July, the regionís weather has been very unstable. All counties have received strong winds, heavy rain, hail or combinations. Counties receiving the most significant hail damage include McIntosh, Dickey, and Sargent. During the past week (July 9 to 15), area rainfall varied tremendously in the region ranging from 0.25 inch or less at Linton, Streeter, Tappen, and Wishek to 6.02 inches at McHenry as recorded at NDAWN (North Dakota Agricultural Weather Network) sites. The regionís estimated crop daily water use on July 15: wheat (May 1 emergence) = 0.22_0.24 inch; corn (May 15 emergence) = 0.29_0.32 inch; soybean (May 22 emergence) and sunflower (June 5 emergence) = 0.27_0.31 inch. Water use data is available at the following NDAWN website:


Generally, crops not impacted by the recent extreme weather are in good to excellent condition with good yield potential present. Growers with late-planted wheat should

continue monitoring for leaf disease and to consider fungicide application for control of foliar and head (scab) disease. Scab is beginning to appear in early-planted small grain and the presence of leaf disease (tan spot, Septoria, and rust) continues to increase. Early-planted small grain is nearing maturity and barley swathing will soon commence. Warm temperatures, sunshine, and adequate soil moisture have promoted rapid corn and late_season crop growth. Corn is nearing tasseling and soybean is at the full-flower stage. Soybean production problems include iron chlorosis, injury from herbicide carryover, root rot, and bacterial blight.

Greg Endres
Area Extension Specialist/Cropping Systems
Carrington Research and Extension Center
Carrington, ND


Southwestern ND

During the past two weeks fields have dried and temperatures have warmed. Air temperatures at the NDAWN locations in southwest North Dakota have reported that temperatures have exceeded 90oF at least once the past 14 days with Dickinson, Hettinger and Mott exceeding 90oF five days. Air temperatures did exceed 100oF at Bowman, Dickinson, Hazen, Hettinger (105oF), and Mott (105oF) on July 13. Precipitation has been highly variable. During the same period the Bowman NDAWN site reported the least rainfall (0.23") while Beach, Hazen (1.48"), Mandan, and Mott all reported rainfall in excess of 0.75 inches Ė not nearly enough to keep pace with water demand by many crops without the use of stored soil water. Where stored soil water is very limited water stress is very evident.

Winter wheat is fast approaching maturity while April seeded spring wheat is in the milk stage of development and April seeded barley is in the soft to hard dough stage. Early seeded peas are firm but not dry. Canola has ceased flowering and pods are filling. Mustard and flax are blooming. Hay harvest continues with excellent weather for drying and bailing the crop.

Roger Ashley
Area Extension Specialist/Cropping Systems
Dickinson Research Extension Center

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