Crop & Pest Report

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Entomology

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Time to Scout for Soybean Aphids (06/30/16)

Over 100 soybean fields were surveyed by the IPM Survey scouts last two weeks in ND and MN (Source: P. Glogoza for MN).

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Ground Nesting Bees (06/30/16)

Extension Entomology has received several calls about bees nesting in the ground.

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Wheat Midge Degree Days for Scouting (06/23/16)

A degree-day model is a good predictor of wheat midge emergence for timing field scouting.

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Scout for Pea Aphids in Pulse Crops (06/23/16)

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

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Wheat Midge Forecast For 2016 (06/23/16)

Soil samples in North Dakota showed low levels of overwintering wheat midge larvae (cocoons) for the 2016 season.

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Leafy Spurge Flea Beetles - DD Update (06/23/16)

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.

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Scout for Colorado Potato Beetles (06/23/16)

Adult Colorado potato beetles are emerging from overwintering sites.

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Invasive Insect Watch (06/23/16)

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

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Diamondback Moth and Cabbage Moth Found in Canola (06/16/16)

Larvae of the diamondback moth and imported cabbage moth have been observed on canola fields near Langdon in Cavalier County.

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Get Ready to Collect Leafy Spurge Flea Beetles (06/16/16)

The noxious weed, leafy spurge, is flowering in ditches and pastures.

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Wheat Curl Mite & Viruses in Wheat (06/09/16)

In North Dakota, wheat curl mites are being found in spring wheat and winter wheat samples.

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Sugarbeet Root Maggot: Peak Fly is Here! (06/09/16)

Sugarbeet root maggot (SBRM) fly activity has increased significantly in the past couple of days, and by the time this report is published, activity levels will have peaked in the southern and central Red River Valley (RRV).

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Watch For Cereal Aphids in Winter Wheat and Spring Wheat (06/09/16)

Field reports from Minnesota (MN) indicate that cereal aphids are become more common and abundant in winter wheat and spring wheat in southern areas of MN, but not the central and northern areas of MN (Source: P. Glogoza & B. Potter, UMN, pers. comm.)

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Sugarbeet Root Maggot: High Activity Expected Next Week! (06/02/16)

Sugarbeet root maggot (SBRM) fly activity is currently at low levels throughout most of the Red River Valley (RRV); however, several sites within the Valley will experience very high populations this year.

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Mystery Insect (06/02/16)

This insect (life stage) was observed in garden soil in Burleigh County.

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Scout for Grasshoppers (06/02/16)

IPM Scouts have observed very low numbers of grasshopper nymphs (only 1 nymph per square yard) that have just hatched in field ditches in Cass and Barnes counties in SE ND.

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Sugarbeet Root Maggot: Flies could come Early this Year (05/26/16)

Recent periods of relatively warm temperatures in the Red River Valley (RRV) have likely accelerated development of overwintered sugarbeet root maggot (SBRM) larvae.

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Wireworm Pressures High (05/26/16)

Numerous calls/emails on crops (winter wheat, hard red spring wheat, field pea, and sugar beets) damaged by wireworms have been received over the past weeks, especially in crops in no-till systems.

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Transform Insecticide Update (05/26/16)

EPA has open a comment period on Transform®/Closer®/Sequoia® with Isoclast® insecticide (a.i. sulfoxalfor) from Dow AgroSciences until June 17th.

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Alfalfa Weevil Emerging (05/19/16)

Based on May 17th degree day accumulations (see map below) for alfalfa weevils in North Dakota, adult weevils are emerging.

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