Crop & Pest Report



ent.knodel.1.soybean aphid map.1

Scout for Soybean Aphids (07/09/15)

Time to start scouting for soybean aphids.

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ent.knodel.9.ambush bug

Good Bug Corner - Ambush Bug (07/02/15)

This week’s Good Bug Corner featured insect is the ambush bug, Phymata sp., in the family Reduviidae.

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ent.knodel.8.leafy spurge beetle map

Degree Day Update for Leafy Spurge Flea Beetles (07/02/15)

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.

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Wheat Stem Sawfly Flying (07/02/15)

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).

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ent.knodel.3.midge mappng

Wheat Midge Populations Lower in 2015 than 2014 (07/02/15)

Soil samples in North Dakota indicate decreased levels of overwintering wheat midge larvae (cocoons) for the 2015 season.

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Scout for Colorado Potato Beetles (07/02/15)

What you need to know about Colorado potato beetles.

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ent.knodel.4.acc base insect dd map

Degree Day Update for Alfalfa Weevil (06/25/15)

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.

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ent.knodel.3.spined soldier bug

Good Bug Corner (06/25/15)

This week’s Good Bug Corner featured insect is the spined soldier bug, Podisus maculiventris, in the family Pentatomidae (or stink bugs).

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ent.knodel.2.sf acc gdd map

Degree Day Update for Leafy Spurge Flea Beetles (06/25/15)

Find out where to check the growing degree days for leafy spurge flea beetles.

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ent.knodel.1.wireworm larval feeding

Wireworms in Sunflower (06/25/15)

Insecticide seed treatments are not controlling late season wireworm populations in sunflowers.

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Cereal Aphids Low in Wheat and Barley (06/25/15)

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.

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Sugarbeet Root Maggot: Activity Dropping, Rescue Treatments Still an Option (06/18/15)

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.

Read More… barley thrips

2015 Economic Thresholds for Barley Thrips (06/18/15)

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.

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First Soybean Aphid Found (06/18/15)

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.

Read More… leafy spurge beetle

Collecting Leafy Spurge Flea Beetles (06/18/15)

Several calls are coming in about collecting leafy spurge flea beetles.

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ent.knodel.alfalfa weevil

Alfalfa Weevil Degree Day Update (06/11/15)

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.

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Mosquitoes Swarming Livestock in Pastures (06/11/15)

With all the rain this spring, blood-sucking mosquitoes are swarming and aggressively biting livestock in pastures.

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Insect Pest Reports (06/11/15)

Reports on Canola and Field Pea included

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Cereal Aphids Arrive (06/04/15)

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.

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ent.knodel.syrphid fly

Good Bug Corner (06/04/15)

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.

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