Over 100 fields were scouted by the IPM Scouts for soybean aphids the last two weeks.
I have received questions about the soybean aphid economic threshold, and some have suggested that the threshold be lowered.
The sunflower moth migrates into ND each year from the south.
The wheat midge pheromone trap monitoring network using the PestWeb system (Montana State University) indicates that numbers of wheat midge increased slightly; however, most traps sites are considered low.
Banded sunflower moths usually emerge from the soil about mid-July.
Field reports of armyworm damaging wheat occurred in Barnes and Ransom counties.
NDSU Extension Entomology is cooperating with Montana State University on the wheat midge pheromone trapping network using the PestWeb system.
The current degree day map indicates that most (50-90%) of wheat midge females are emerging this week.
Pheromone traps ran by the NDSU Extension IPM scouts have trapped low numbers (<14 moths per trap per week) of banded sunflower moth in Cass, Barnes and Foster counties.
Tarnished plant bug, Lygus lineolaris, is one of the more common species of Lygus bugs and is known to feed on over 385 crops and weed plants.
Accumulated growing degree days (AGDD) from NDAWN (sunflower degree days/growth stage application) indicated that we are at optimal time to collected flea beetles between 1,200 and 1,600 AGDD.
The current degree day map indicates that 10-50% of wheat midge females are emerging.
Over 100 soybean fields were surveyed by the IPM Survey scouts last two weeks in ND and MN (Source: P. Glogoza for MN).
Extension Entomology has received several calls about bees nesting in the ground.
A degree-day model is a good predictor of wheat midge emergence for timing field scouting.
Low numbers of pea aphids, only 1 per sweep, are being found in field peas in Mountrail, Divide and Williams counties, and in lentils in Williams and McKenzie counties
Soil samples in North Dakota showed low levels of overwintering wheat midge larvae (cocoons) for the 2016 season.
Accumulated growing degree days (AGDD) from NDAWN (sunflower degree days/growth stage application) indicated that leafy spurge flea beetles are getting close to 1,200 when flea beetles should be collected between 1,200 and 1,600 AGDD.
Adult Colorado potato beetles are emerging from overwintering sites.
If you see any of these insects, please contact your local county extension office, the North Dakota Department of Agriculture or one of the authors listed below. Thank you