Grasshopper nymphs are increasing in some areas (see maps below) and may start moving into field edges of crops.
IPM scouts trapped banded sunflower moth at one location near Carrington REC in Foster County, so emergence is beginning.
The IPM Crop Scouts have surveyed over 80 soybean fields last week and no soybean aphids were observed in North Dakota.
This peculiar looking larva is called the Argus tortoise beetle (Chelymorpha cassidea (Fabricius)).
Eighty-seven percent of the barley is in the advanced jointing crop stage in North Dakota (USDA NASS, ND – July 7, 2014) and susceptible to damage from barley thrips.
The updated degree day map for leafy spurge flea beetles (Aphthona species) indicates that land managers should collect adult flea beetles in North Dakota.
NDSU IPM scouts and crop consultants have observed the first adult wheat stem sawflies...
Aster leafhoppers were detected in only 23% of the canola fields surveyed from June 30 through July 3 in North Dakota and Minnesota.
Aster leafhoppers were found in only 20% of the canola field surveyed from June 21-25 in North Dakota and Minnesota.
Soil samples in North Dakota indicate increasing levels of overwintering wheat midge larvae (cocoons) in localized areas for the 2014 season.
Adult Colorado potato beetles are emerging now from overwintering sites. The adult is 3/8 inch long, with oval body and a yellow-brown with 5 black stripes on each wing cover.
The updated degree day map for leafy spurge flea beetles (Aphthona species) indicates that land managers can scout and/or collect adult flea beetles in North Dakota, based on the sunflower GDD model from NDAWN.
An isolated Hessian fly infestation was found in Syngenta’s hard red spring wheat variety trial near Beach in SW ND.
Increased numbers of diamondback moth larvae are being found in canola fields in McLean County near Roseglen, and Mountrail County near Parshall.
Aster leafhoppers were detected in only 29% of the canola field surveyed from June 16-20 and continue to be at very low densities (0 to 25 leafhoppers per 9 sweeps) in canola in North Dakota and Minnesota.
Most of the alfalfa is being cut or has been cut in the southeast region of North Dakota, and has escaped major defoliation from alfalfa weevil feeding.
The updated degree day map for leafy spurge flea beetles (Aphthona species) shows that it is still early to begin scouting and collecting adult flea beetles in most of North Dakota.
Significantly high sugarbeet root maggot (SBRM) fly activity has occurred in several of our trapping locations in the past couple of weeks. Locations of most concern, where the highest activity levels have been observed in recent days, include Ada, Grand Forks, Reynolds, St. Thomas, and Thompson.
Sugarbeet root maggot (SBRM) fly activity increased considerably during the past week, with sites in the southern Red River Valley (RRV) reaching peaks between June 13 and 16.
The wet, cool weather has kept the cereal aphids and grasshoppers low throughout the state.