Carrington Research Extension Center
North Dakota State University
NDSU Extension Service
North Dakota Agricultural Experiment Station

Ag Alert

LIMITS ON LATE FOXTAIL HERBICIDE APPLICATION IN WHEAT

Wheat is rapidly growing and as well as weeds including green and yellow foxtail (pigeongrass). If herbicide application is still required for foxtail control in wheat, consider the following wheat and foxtail stage limits for post-emergence foxtail herbicides:

  Wheat Foxtail
Achieve Up to boot 5-leaf
Cheyenne End of tillering or 6-leaf (HRS only) 2-tiller, (green only)
Dakota End of tillering, or 6-leaf (HRS only) 2-tiller (green only)
Hoelon Up to 4-leaf 4-leaf
Puma 6-leaf (prior to jointing) 2-tiller
Stampede 4-leaf (durum), 5-leaf (HRS) 3-leaf
Tiller Up to 6-leaf (HRS only) 2-tiller

Refer to herbicide labels and NDSU Extension Service circular W-253 '1999 North Dakota Weed Control Guide' for required information on herbicide use.

WHEAT MIDGE EMERGENCE FAST APPROACHING

Adult orange wheat blossom midge emergence begins around 1100 to 1200 degree day (DD) units at a base temperature of 40 F. Males emerge first followed by female emergence which begins at 1300 DD. The following is a listing of accumulated DD units, as of June 15 and based on the ND Ag Weather Network, for selected south-central ND locations: Oakes = 1223, McLeod =1218, Edgeley = 1064, Linton = 1042, Jamestown = 1016, Carrington = 1007, Bismarck = 988, and Harvey = 964. Midge should be emerging in the south-east part of this region and in other parts of south-central ND in the near future. Scouting for midge should begin when wheat begins to head. Economic threshold for insecticide treatment is an average of 1 adult midge per 4 to 5 heads. Additional details on obtaining DD units for your area, and wheat midge scouting and management may be obtained from NDSU Extension Service offices.

CROP PEST MANAGEMENT FIELD SCHOOL

A Crop Pest Management Field School for crop advisers will be offered by the NDSU Extension Service on Thursday, July 1 at the Carrington Research Extension Center. The program will cover weed identification, herbicide mode-of-action and crop problem diagnosis, insect identification, small grain and canola insect management, small grain foliar and head disease diagnosis and management, precision fungicide application, and sclerotinia (white mold) management.

A completed preregistration form and $30 payment is requested by June 24 to be enrolled in the school. Participation will be limited to the first 50 participants. An application for seven continuing education units in the pest management area of the CCA program have been submitted. Further details and a preregistration form may be obtained by contacting the Carrington Center (telephone: 701-652-2951; FAX: 701-652-2055; e-mail: gendres@ndsuext.nodak.edu) or NDSU Extension Service offices.


Greg Endres, Area Extension Specialist/Cropping Systems, Email: gendres@ndsuext.nodak.edu
1999 Ag Alert Archive * Carrington R&E Center Home Page * NDSU Agriculture