FROM AROUND THE STATE
ISSUE 4 May 24, 2001
Canola Insect Pest Update
Crucifer Flea Beetle: Overall, feeding activity or damage levels are lower than last year. The weather conditions have not been favorable for flea beetle movements to canola field for feeding – too cool, dry in areas, and windy for easy flight dispersion. However, there has been some "HOT" spots reported in southern Ward County, Mountrail County, and McLean County. A limited number of fields have been sprayed with Capture for flea beetle control.
Other Insect Pests Reports
Grasshoppers: Early instar grasshoppers (i.e., Two-stripped grasshoppers) have been observed emerging now. No problems have been reported yet.
Janet J. Knodel
Area Extension Specialist Crop Protection
North Central Research and Extension Center
North Central/Northwest Crop Report
Dry top-soil conditions is the main issue facing most north central and northwestern counties. Bottineau and Pierce counties are still wet with many fields probably not going get seeded. Areas around Minot are still waiting for their first significant spring rain. Top-soil conditions have deteriorated the past week due the high winds and
lack of rainfall. Sub-soil moisture conditions across the region are adequate to surplus; only if we could get a half to an inch of rain to re-wet the top-soil.
Most of the cool-season crops have been planted with good stands being established. There is a considerable amount of durum yet to be seeded in the northwest part of the state. Sunflowers and soybeans that were seeded last week are beginning to emerge. The last two nights there have been light frosts reported with no reports of damage to any emerged crops.
This year won't be remembered as a wild oat year. There are some isolated wild oat hot spots, but for the most part they forgot to wake up this spring. The main weed problems have been kochia, russian thistle, foxtails, and wild buckwheat. Many early seeded canola and pea fields are now being sprayed; that is if the wind would ever go down.
Area Extension Agronomist
North Central Research/Extension Center
Planting progress continues to be delayed throughout much of the region. Northwest Benson, northern Towner and Rolette Counties have the most crop seeded. Other areas are behind schedule due to heavy fall or continuous spring rain. Fields are difficult to cultivate as soils tend to be saturated under the surface. A few fields of small grain are in the 1-2 leaf stage. The earliest canola and flax fields are beginning to emerge. Row crop planting is just
getting started. Wild oat are emerging as are most other weeds. Rain and cold contining Wednesday. Only about 30% of the farmland in the region has been seeded.
Area Extension Specialist/Cropping Systems
During the past week (May 16-22), rainfall recorded at NDAWN sites in south-central North Dakota ranged from 0.17 inches at McLeod to 0.82 inches at Dazey. Most of the region received at least 0.33 inch of rain.
South of I-94, seeding of small grain, corn, and canola acreage is nearly complete. Soybean, dry bean and sunflower planting is underway. At least half of the soybean acres have been planted. Early-planted soybean fields are emerging. Alfalfa harvest may begin after Memorial Day. North of I-94, small-grain seeding may be about 50% complete (widely variable) and bean and sunflower planting has begun. Based on growing degree day units, wheat emerged on May 1 was in the 4- to 4.5-leaf stage and wheat emerged on May 15 was in the 2-leaf stage as of May 22.
Canola injury from flea beetle has been observed in the region including Logan and Ransom counties. Emerged to 4- to 6-leaf canola should be frequently monitored for flea beetle presence and feeding injury. POST herbicide application did not occur during May 20-23 in early-seeded small grain and canola because of rainfall and high wind speed. For example, maximum daily wind speed ranged from 33-42 MPH at Carrington on May 20-22. ‘Sand-blasted’ crops are easily found throughout the region due to soil particle movement from high wind. Tan spot (low incidence) is present in winter wheat at the Carrington Research Extension Center. Dry, warm, and low-wind conditions are needed in this region.
Area Extension Specialist/Cropping Systems
NDSU Carrington Research Extension Center