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.
Leafy spurge is flowering and land managers are interested in obtaining leafy spurge flea beetles (Aphthona species) for biocontrol of this noxious weed.
We are monitoring the population levels of aster leafhoppers (also called 6-spotted leafhopper) in canola in northeast and north central North Dakota and northwest Minnesota in our cooperative 2014 NDSU and UMN.
Cereal aphids have arrived in ND cereal grain fields. Out of 143 wheat fields and 16 barley fields scouted by the IPM Scouts, only one field or about 1% had cereal aphids present. Kyle Aasand, IPM Scout from Carrington REC, found 2% of the plants infested with aphids in Stutsman County in the central region of ND.
Pea aphids made their appearance in the Roseglen area of McLean County, ND.
Larvae of diamondback moth infesting canola were found in canola located in southwest of Roseglen, McLean County, north central ND.
Sugarbeet root maggot (SBRM) fly activity is being monitored this year at 40 Red River Valley (RRV) sites by NDSU staff in cooperation with American Crystal Sugar Company and the MinnDak Farmers Cooperative.
Scouting for wheat midge is critical from heading through early flowering (<50% flowered), especially in areas where the 2013 fall soil survey indicated moderate to high risk for wheat midge larvae.
Corresponding with the relatively slow start to the 2014 growing season, sugarbeet root maggot (SBRM) fly emergence is also off to a slow start.
Scouting is crucial now when field crops are in early development stages. So, scout regularly for alfalfa weevil, cutworms, and grasshoppers
Flea beetles have emerged in large numbers with the warm, sunny days. Significant feeding injury (>50% defoliation) and stand loss are being observed in Bottineau, Rolette, Towner, Cavalier, Ramsey, Walsh, and Dunn Counties, especially on the early-seeded canola (before mid-May).