Time to start scouting for soybean aphids.
This week’s Good Bug Corner featured insect is the ambush bug, Phymata sp., in the family Reduviidae.
Using the sunflower GDD model from NDAWN, the accumulated growing degree days (AGDD) for leafy spurge flea beetles indicate that we can collect flea beetles (AGDD = 1,200 to 1,600) throughout the state.
Several field reports of low numbers of wheat stem sawfly adults flying in wheat have been received from NC (Ward-Mountrail Counties between Max and Parshall), NW (McKenzie County) and SW (Sioux County) areas of North Dakota (IPM survey data).
Soil samples in North Dakota indicate decreased levels of overwintering wheat midge larvae (cocoons) for the 2015 season.
What you need to know about Colorado potato beetles.
Based on the accumulated growing degree days, most of North Dakota is past or at peak feeding (or 504 - 595 AGDD) when larvae are in the 3rd to 4th instars.
This week’s Good Bug Corner featured insect is the spined soldier bug, Podisus maculiventris, in the family Pentatomidae (or stink bugs).
Find out where to check the growing degree days for leafy spurge flea beetles.
Insecticide seed treatments are not controlling late season wireworm populations in sunflowers.
Cereal aphids continue to be found at very low incidence. IPM Scouts scouted 83 wheat and 38 barley fields and found cereal aphids in only 11 fields or 8% of fields surveyed.
This year’s sugarbeet root maggot (SBRM) fly monitoring program suggests that SBRM populations are at the highest levels they have been in the past 10 years.
Fifty-eight percent of the barley is in the jointing crop stage in North Dakota (USDA NASS, ND – June 15, 2015) and susceptible to damage from barley thrips.
IPM Scouts scouted 35 soybean field last week and one field had a soybean aphid present in Richland County, only 1% of plants infested with one aphid per plant.
Several calls are coming in about collecting leafy spurge flea beetles.
The southeast area of North Dakota has accumulated enough degree days (DD) for the major leaf feeding stage (504 to 595 accumulated DD) by weevil larvae.
With all the rain this spring, blood-sucking mosquitoes are swarming and aggressively biting livestock in pastures.
Reports on Canola and Field Pea included
Our first cereal aphids were detected in McHenry County in the NC area of North Dakota at sub-economic level, 14% incidence, on durum wheat by the IPM Scout, Jacee Aaseth. Scouting over the next month will be important for the wheat (spring, durum and winter), oat and barley.
This week’s featured bug is the syrphid fly or hoverfly (Diptera: Syrphidae). There are about 1,000 species of syrphid flies in North America, and are common in field crops.