Crop & Pest Report

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Entomology

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European Corn Borer Trap Update (07/26/18)

Trap catches of the univoltine Iowa (or Z-race) of European corn borer (ECB) decreased this past week.

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2018 Insect Thresholds for Sunflowers (07/26/18)

The USDA NASS reports that 28% of the sunflowers were blooming in North Dakota as of July 23rd, compared to only 14% last year (USDA NASS News Release).

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Soybean Aphids Continued Low (07/19/18)

The IPM Survey and other field reports on soybean aphid counts are still low, about 10% of plants in fields are infested with an average of <10 aphids per plant in ND.

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European Corn Borer Trap Update (07/19/18)

The Iowa (or Z-race) of European corn borer (ECB) was captured in 8 of the 10 trap sites.

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Red Headed Flea Beetle in Soybeans and Corn (07/19/18)

There have been several calls, email and texts about the red-headed flea beetle (Systena frontalis) causing foliar defoliation in soybeans and field corn.

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Scout for Pea Aphids (07/19/18)

Pea aphids are increasing in pulse crops in north central and northwest ND.

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jan 6

Mystery Bug (07/12/18)

This insect was observed on sunflower near the field edge. What is it?

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jan 5

European Corn Borer Emerging (07/12/18)

NDSU Extension Entomology set up a European corn borer (ECB) trap network using pheromone traps to monitor populations in conventional field corn this year.

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jan 4

Soybean Aphids Low (07/12/18)

The IPM Survey and other field reports on soybean aphid counts are low, about 10% of plants in field infested and an average of <10 aphids per plant in ND.

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jan 3

Scout for Grasshoppers and Armyworms in Wheat (07/12/18)

Isolated hot spots of grasshoppers and armyworms were reported in wheat from southeastern ND. Some fields needed to be treated with insecticides.

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jan 1

Wheat Midge Flight Ending (07/12/18)

For wheat midge emergence, accumulated degree days have reached more than 1800.

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Wheat Stem Maggot Damage –White Heads (07/05/18)

Damage from wheat stem maggot (Meromyza americana) is high in some areas of ND, southeast and southwest, with >25% incidence of white heads in fields.

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Peak Wheat Midge Flight (07/05/18)

Due to the heat, wheat midge emergence is occurring faster and most of the flight is at peak emergence this week, even in northern ND.

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Update on Leafy Spurge Flea Beetles Degree Days (07/05/18)

Degree days are moving fast! Southeast area of ND is almost at the end of the period for collecting leafy spurge flea beetles, while the northern areas of the state have just accumulated enough degree days to start collecting leaf spurge flea beetles for biocontrol of the noxious weed leafy spurge.

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Sunflower insects Emerging (07/05/18)

The IPM Survey insect trap network in sunflowers for banded sunflower moth.

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Aphids are Here! (06/28/18)

Low populations of soybean aphids and cereal aphids are being found in the IPM Survey of ND and MN (soybeans only).

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Blister Beetles in Soybeans (06/28/18)

Several calls have come into the office on blister beetles feeding on soybeans causing defoliation on leaves from Crosby in Divide County, and Upham in Bottineau County.

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Update on Leafy Spurge Flea Beetles Degree Days (06/28/18)

Most of North Dakota has accumulated enough degree days to start collecting leaf spurge flea beetles for biocontrol of the noxious weed leafy spurge.

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Scout for Wheat Midge (06/28/18)

Wheat midge emergence is underway in the northern tier of North Dakota and will continue for the next 1-2 weeks depending on temperatures.

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Grasshopper Hot Spots (06/28/18)

The NDSU Extension IPM scouts are finding increasing levels of grasshopper nymphs (immatures) in areas of the state that missed the rains.

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