ISSUE 8   June 28, 2007

Southwest ND

Rainfall as reported by NDAWN over the past two weeks has totaled from 0.02 inches at Dickinson to 1.22 inches at Mott. This drier weather has allowed many producers to get into the field to finish the application of herbicides and fungicides in some of the later planted spring crops and to begin haying. Some isolated areas such as Fairfield received over 3 inches of rain as well as damaging hail. To date for the month of June at Dickinson, total precipitation is 1.61 inches. If no additional rainfall occurs over the next three days we will fall well below the long term average of 3.6 inches. Crops for the most part are in very good to excellent condition.

Rust infections on wheat crops located in Adams, Morton, Sioux, Grant and eastern Stark and Dunn Counties was found by the southwest NDSU IPM scout this past week. Other counties where scouting occurred last week included Bowman, Slope, Mercer, and Oliver but rust was not detected in any of the fields he stopped in. Aphids have been found in a number of fields but below threshold levels needed to consider spraying. A bright yellow flag leaf here and their in a few wheat fields may be the result of Barley Yellow Dwarf disease which is transmitted by the aphids. Wheat stem maggot was also discovered in eastern Stark and Adams Counties.

Roger Ashley
Area Extension Specialist/Cropping Systems
(701) 483-2348 ext 106


South-Central ND

During the past two-week period (June 13-26), the region received rain ranging from 0.2 inches at Linton to 4.4 inches at Jamestown, based on NDAWN (North Dakota Agricultural Weather Network). Little to no rain occurred during the past week, allowing topsoil to dry and reducing the disease threat in small grain. Reports by Extension ag agents indicated variable crop damage due to hail in southern Barnes County and northern Burleigh County.

Cool-season crops generally have excellent yield potential. Winter wheat is in the seed-fill stage, and spring wheat ranges from flag leaf to watery-ripe stages. Corn is in the 6- to 9-leaf stage and growth rate has greatly accelerated with warm temperatures, adequate soil moisture, and roots reaching soil nitrogen. Corn growing degree days are ahead of normal in the region (advanced by 0.5-2 leaf). Soybean are in the second or greater trifoliate stages and will soon be flowering. Most soybean fields have received one herbicide application. Farmers are applying fungicides to flowering wheat for scab suppression and leaf spot control. Check NDSUís small grain disease forecasting website ( to assist with decisions on application of fungicides. Scab is present in winter wheat. Also, leaf rust is high in susceptible winter wheat varieties not treated with fungicide, and strip rust has recently been found (Ellendale area).

Greg Endres
Area Extension Specialist/Cropping Systems
NDSU Carrington Research Extension Center

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