NDSU Crop and Pest Report


ISSUE 5  May 29, 2003

Northeastern ND

Wide spread rain of one forth to one half inch started Friday, May 23 in the afternoon and delayed field work until May 26 or later depending on rain amounts and soil types. Soil moisture is adequate to excessive throughout the region. Field work is now wide spread, even in the wettest areas of the region. Seeding progress varies widely throughout the region. Some growers are done with cool season plantings and others have not been able to seed anything. Estimates for all planted acres vary from 45 percent to 85 percent depending on the county.

Winter wheat growth is mostly in the jointing stage with good stands. Earliest planted spring wheat is now in the four leaf stage. May 18th and earlier plantings of corn are now emerging. Weed control is beginning in earliest planted small grains. Crops are emerging nicely due to timely rains and good stands are being obtained. Planting of sunflower, soybeans, dry beans and wheat continues in wettest areas. Pest problems are manageable at this time.

Terry Gregoire
Area Extension Specialist/Cropping Systems


Southwestern ND

Rainfall this past week was light at nearly all NDAWN stations southwest of the Missouri River reporting between 0.01 to 0.08 inches. The exception was at the Mandan site which recorded 0.44 inches. The drier conditions in much of southwest North Dakota allowed fields to dry and field activities resumed. Many producers should finish up on wheat, durum, barley, and corn by this week’s end.

Producers in southwest North Dakota over the past three years were caught off guard and have suffered severe losses to alfalfa weevil. Alfalfa producers should begin scouting for alfalfa weevil. As of today (May 28) we have accumulated 255 alfalfa weevil growing degree days. If temperature predictions hold true for the remainder of the week we should accumulate 300 growing degree days by Saturday, May 31. If the model Phil Glogoza, NDSU Extension Entomologist, presented in the ND Crop and Pest Report, No 1, page 3 holds true, alfalfa weevil eggs should begin hatching and we should begin seeing damage from this pest. Accumulated alfalfa weevil growing degree days at other locations in southwest North Dakota are: Mandan, 259; Hettinger, 223; and Bowman, 205.

The grasshopper hatch is underway. Large numbers of grasshoppers (50 + per sweep) have been reported in areas of Golden Valley and Billings Counties by Harvey Peterson, Golden Valley County Agent. Spraying has been occurring to control young hoppers in field margins, ditches, and pastures adjacent to field crops.

Alfalfa is 22 to 24 inches high. Some common leaf spot leaf spot on alfalfa was noted this past week. Canola seeded early in April is bolting and spring wheat is in the four- to six-leaf stage in many fields where planting occurred prior to the rains which began May 4.

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


South-Central ND

During the past week (May 21 to 27), area rainfall was about 0.25 inches or less in the region as recorded at NDAWN (North Dakota Agricultural Weather Network) sites. Topsoil and subsoil moisture generally is adequate. The recent sunshine and warmer weather has been welcome for continuing planting and for established crop development.

Small grain and flax planting is essentially completed. Yellow small grain can be found in the region due to factors including water-saturated soils, N leaching, and tan spot. But in general small grain stands and yield potential continue to be excellent. Wind and scattered showers have hampered POST herbicide application in small grain.

The majority of soybean acres will be planted by the end of the month. NDSU soybean planting trials conducted in 1999-2001 at Carrington indicate a yield advantage of 6% with mid-May versus early-June planting. Last year in Minot, there was a 14% yield advantage with planting soybean on May 20 compared to planting on June 6. If growers are planting soybean during the first week of June, consider using early-maturing varieties if available.

Planting also continues with dry bean, sunflower, and warm-season forages. Alfalfa harvest may begin in early June in southern counties and general haying should begin in 1-2 weeks.

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

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