Crop & Pest Report

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Entomology

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Soybean Aphids - IPM Scouting Reports (07/21/16)

Over 100 fields were scouted by the IPM Scouts for soybean aphids the last two weeks.

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Soybean Aphid Economic Threshold (07/21/16)

I have received questions about the soybean aphid economic threshold, and some have suggested that the threshold be lowered.

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Sunflower Insect Trap Update (07/14/16)

The sunflower moth migrates into ND each year from the south.

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Wheat Midge Trapping (07/14/16)

The wheat midge pheromone trap monitoring network using the PestWeb system (Montana State University) indicates that numbers of wheat midge increased slightly; however, most traps sites are considered low.

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Scout for Banded Sunflower Moth (07/14/16)

Banded sunflower moths usually emerge from the soil about mid-July.

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Armyworm Damage in Wheat (07/07/16)

Field reports of armyworm damaging wheat occurred in Barnes and Ransom counties.

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Wheat Midge Trapping (07/07/16)

NDSU Extension Entomology is cooperating with Montana State University on the wheat midge pheromone trapping network using the PestWeb system.

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Wheat Midge Degree Days Update (07/07/16)

The current degree day map indicates that most (50-90%) of wheat midge females are emerging this week.

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Banded Sunflower Moth Emerging (07/07/16)

Pheromone traps ran by the NDSU Extension IPM scouts have trapped low numbers (<14 moths per trap per week) of banded sunflower moth in Cass, Barnes and Foster counties.

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Scout for Lygus Bugs in Pulse Crops (06/30/16)

Tarnished plant bug, Lygus lineolaris, is one of the more common species of Lygus bugs and is known to feed on over 385 crops and weed plants.

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Leafy Spurge Flea Beetles - DD Update (06/30/16)

Accumulated growing degree days (AGDD) from NDAWN (sunflower degree days/growth stage application) indicated that we are at optimal time to collected flea beetles between 1,200 and 1,600 AGDD.

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Wheat Midge Degree Days Update (06/30/16)

The current degree day map indicates that 10-50% of wheat midge females are emerging.

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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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