Crop & Pest Report



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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Sugarbeet Root Maggot: The Calm before a Pending Storm (06/04/15)

Although sugarbeet root maggot (SBRM) fly activity is currently at low levels throughout most of the Red River Valley (RRV), all indicators thus far suggest that some sites within the Valley will experience very high populations this year.

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ent.boetel.table 1 acc dd root maggot

Sugarbeet Root Maggot: Activity Peaks Possible Within 2 Weeks (05/28/15)

The first sugarbeet root maggot (SBRM) flies of the season were observed on Tuesday, May 26 in a field near St. Thomas, ND.

Read More… lacewing.good bug corner

Good Bug Corner (05/28/15)

This week’s featured is the green lacewing (Chrysopa species). The adult is a beautiful 1 inch long, green insect with 2 pair of clear, network-like wings, and large golden to red eyes.

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ent.knodel.acc.base.48 dd.insect

Insect Pest Updates (05/28/15)

Insect pest updates on canola, alfalfa, wheat, and field peas.

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Good Bug Corner (05/21/15)

This week’s featured group is beneficial wasps (also called parasitoids) that attack and kill eggs and immature stages of many insect pests. Parasitoids are described as tiny wasps in the insect order Hymenoptera and include many different families (Braconidae and Ichneumonidae, for example).

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Watch Out for these Invasive Insect Pests (05/21/15)

Since the cold temperatures have slowed insect pest activity this past week, I thought this would be a good opportunity to update you on the status of a few invasive insect pests of field crops. Please look for these invasive insect pests when you are out scouting fields or around your home.

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