FROM AROUND THE STATE
ISSUE 7 June 18, 1998
Finally, we have a good rain to report across the north central and north western regions of the state. Most of the area has picked up 0.5 to 1.5 inches of rain with reports as high as 4 inches. Small grains, cool season oil-seed crops, field pea, and lentils have responded to recent rains and cool weather. Most fields are in good shape compared to last year at this time. Early planted dry beans and sunflowers look good as well. Late seeded sunflowers will need some warm weather to get back on track.
Small grains seeded in mid April is beginning to head out. Early seeded wheat has spikelet counts from 12 to 15 and are well tillered. Most of the small grain crop is in the 4 to 6 leaf stage. Early seeded canola and mustard is bolting and beginning to bloom.
Canada thistle is a major weed problem in crop. Weed control for the most part as been good for the tough conditions (dry, frost). Some tan spot and septoria is starting to show up on lower leaves in some wheat fields but no fungicides have been needed as of yet.
Area Extension Specialist/Cropping Systems
Crucifer flea beetle Most fields of canola are growing fast with the recent rains and in the rosette to bolting to flowering growth stages. The flea beetle season is over!
Diamondback moth Pheromone trap counts are remaining stable or increasing at most trap sites. Reports of some larval feeding continue. The second flight of moths from local populations and migrates from the south will be more important if the canola is in the critical pod development stages. Larvae feed and damage the developing pods. Id like to thank and acknowledge the hard working cooperators running the traps (listed alphabetically): Craig Ellsworth, Dan Folske, Jim Harbour, Mike Hutter, Dale Naze, LoAyne Voigt, Tim Semler, and Cindy Spoor.
Bertha armyworm Traps will be set out for Bertha armyworms within the next two weeks in the canola insect pest pheromone trapping network. This armyworm is carried northward by winds from winter breeding sites in the United States. Early detection is the key to preventing a severe outbreak. Regional pheromone trap monitoring indicates where and when field sampling for larvae should be conducted.
Orange Blossom Wheat Midge Emergence is approaching! Male midge will start emerging at 1100 degree days and females at 1300 DD. As of June 16, 1998, the following DD (using a base of 40°F) has accumulated: Minot, Ward County = 1075; Mohall, Renville County = 951; Bottineau, Bottineau County = 958; Towner, McHenry County = 935; Rolla, Rollete County = 855; Columbus, Burke County = 861; and Turtle Lake, McLean County = 1036.
Sunflower beetle active! Adults, and eggs have been reported from most of the sunflower growing areas. Fields with adult sunflower beetles and young grasshoppers will need to be checked frequently until plants are past the early growth stages (>6 leaves).
Late Season Cutworms damaging sunflowers seedlings! Numerous reports have been received from Bottineau and Pierce Counties on the red-backed cutworms killing sunflowers. If young larvae (<1/2 inch) are found and common, sprays may be necessary to save fields
PASTURES AND FIELD CROPS
Grasshoppers are still moving into fields. Check along the field edges with grassy borders and look for the characteristic feeding symptoms of ragged leaf edges!
European corn borer is being monitored with pheromone traps in Velva and Rugby in this region. No moths have been detected at these sites. However, moths have been captured in Carrington and southeast North Dakota.
Janet J. Knodel
Area Extension Specialist Crop Protection
North Central Research and Extension Center