ndsucpr_L_sm.jpg (11690 bytes)


ISSUE 13  July 27, 2000


North-Central ND

Canola Insect Pests Update

        – aphids on canola terminals but low infestation levels (<25%).

        – blister beetles. Note some fields required treatment.

                  – Zebra caterpillar moth. This caterpillar was present during the Bertha armyworm
                     outbreak of 1995-96.


Orange Wheat Blossom Midge Flight near End in the North Central and Northwest
Hooray! Limited activity is still being reported in the northern counties, especially Divide.
Most of the spraying in Divide will be completed this week.

Sunflower Insects

– No reports of any red sunflower seed weevils infesting sunflower heads yet. Most fields are not
flowering or shedding pollen yet.

– There is a few scattered reports of spraying for the larvae of the sunflower beetle.

– Thistle caterpillar and banded sunflower moth were found near Gardena in Bottineau County,
but very low levels (source: B. Sund, CENEX Newburg).

Wheat and Canola Diseases
   Assessments of losses from scab are being taken at Minot variety plots and are averaging
moderate-high levels (source: K. McKay).


Janet J. Knodel
Area Extension Specialist Crop Protection
North Central Research and Extension Center
Minot, ND


South-Central ND

    Total rainfall as recorded at NDAWN sites in south-central ND during July 19 to 25 ranged
from 0.10 inch or less at Dazey, McHenry, McLeod, and Oakes to 0.9 inches at Linton. The recent
reduced amounts of rain have been welcome to allow some field drying, haying to continue, and small
grain harvest to begin. On July 25, estimated daily water use ranged from 0.13 to 0.27 inches for corn
emerged May 15, dry bean and soybean emerged May 29, and sunflower emerged June 5.

    Winter cereal harvest has begun south of I-94. Initial reports on winter wheat yields are indicating
up to 75 bushels/acre. Barley swathing is rapidly advancing and swathing of wheat and oat has begun
south of I-94. Barley swathing is beginning in the northern part of this region. Canola swathing has
begun as far north as the Harvey area. Fields of flax and field pea are nearing maturity. Warm-season
crops continue to rapidly develop. Corn is tasseling, soybean are forming pods (R3 stage), and
sunflower are beginning to bloom.

    Leaf spot disease (tan spot, leaf rust, and Septoria in wheat; spot and net blotch in barley) severity is
rapidly increasing. Scab is easily detected in wheat but severity appears quite variable in the region.
Sclerotinia can be readily found in canola. Aster yellows also is present again this year in canola. Dry
bean growers should be carefully monitoring their crop for initial white mold symptoms.

    Black light trap counts for European corn borer at Carrington continue to indicate low moth counts.
Scattered reports have been received of leafhoppers in dry bean (Barnes County) and armyworms in
small grain (Steele County). Numerous small grain fields have patches of wild oat, kochia, Canada
thistle, and other miscellaneous weeds that growers will have to contend with during harvest.

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


cprhome.jpg (3929 bytes)topofpage.jpg (3455 bytes)tableofcontents.jpg (4563 bytes)previous.jpg (2814 bytes)next.jpg (1962 bytes)