Crop & Pest Report

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Entomology

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European Corn Borer Egg Masses (08/08/13)

Egg masses of European corn borer have been found in the North Central Region of North Dakota, near Mohall (Source: V. Chapara, NCREC, Minot).

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Prevent Insect Problems in Grain Bins (08/08/13)

The key to good grain storage is anticipating and preventing potential problems through good bin management. Before treating with an insecticide protectant, make sure that the bins are free of insect-infested grain.

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Insecticide Control of Sunflower Head Insects (08/01/13)

Chemical treatment is directed at the larval stage of the banded sunflower moth, which is the actual damaging stage. The 2013 economic threshold for the Banded sunflower moth is only one moth per 100 plants due to the high market value of oilseed sunflowers. Please see the article on “Sunflower Insects Emerging” in the Crop & Pest Report #10, July 11, 2013 for more details on banded sunflower moth thresholds.

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Adult Corn Rootworms Emerging (08/01/13)

Northern corn rootworm adults are emerging and teneral adults (soft exoskeleton and not fully colored) were captured in our emergence traps near Arthur, Cass County, on Friday, July 26th.

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Red Headed Flea Beetle in Soybeans and Corn (08/01/13)

There have been several calls, email and texts about the red-headed flea beetle (Systena frontalis) causing defoliation in soybeans and chewing on silks in corn. Some of the field reports are from Portland in Traill County, Page in Cass County and Lisbon in Ransom County.

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Japanese Beetles Traced To Minnesota Nursery (08/01/13)

NORTH DAKOTA DEPARTMENT OF AGRICUTLURE, BISMARCK – Infestations of Japanese beetles in four North Dakota cities have been traced to a Minnesota-based nursery. “Japanese beetles have been found in traps in Bismarck, Fargo, West Fargo and Grand Forks,” said Agriculture Commissioner Doug Goehring. “All have been traced to shipments from Bailey Nurseries of St. Paul.”

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European Corn Borer Emerging (07/24/13)

According to the degree day model for the univoltine-type European corn borer, adult moths are emerging.

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Cereal leaf beetle larva and characteristic windowpane feeding injury on leaf

New County Records for Cereal Leaf Beetle (07/24/13)

Cereal leaf beetle larvae were discovered feeding on barley and winter wheat in three new counties of North Dakota by the Area Crop Protection Extension Specialist, V. Chapara, and the IPM Survey scout, K. Syverson.

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Updated Extension Entomology Website (07/24/13)

Check out the updated NDSU Extension Entomology website. Any feedback is appreciated.

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Protecting Bees the Focus of First Pollinator Summit (07/24/13)

Please see the press release below. ND Agriculture Commissioner Doug Goehring will be hosting a pollinator summit from 1 pm to 5 pm on July 31 at the Kelly Inn in Bismarck.

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No Sorghum Midge in Corn in ND (7/18/13)

There has been a rumor of sorghum midge infesting corn in eastern ND and that producers need to spray insecticide for its control.

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Lauxaniid Fly Common in Fields (7/18/13)

Several calls have come in reporting large numbers of a small, orange fly in field crops including wheat, corn, soybean and others. This is the lauxaniid fly, Camptoprosopella borealis (Diptera: Lauxaniidae), and is NOT an insect pest of field crops.

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Late Planted Cereal Crops Still at Risk for Cereal Aphids (7/18/13)

Any late planted spring wheat, durum wheat or barley will still be at high risk for cereal aphid infestation up through the completion of heading.

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Wheat Midge Emergence Slowing Down (7/18/13)

A few field scouting reports for wheat midge from the north central region of ND indicate that wheat midge populations are low. At 1600 degree days (DD), female wheat midge emergence is 90% completed.

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Soybean Insect Pest Update (07/18/13)

With the recent hot dry weather, the two-spotted spider mites has returned to attack soybeans in areas where no rain has fallen over the past two weeks, such as south central ND.

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Sunflower Insects Emerging (07/11/13)

Banded sunflower moths and sunflower moths are being captured in pheromone traps across North Dakota.

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Time to Collect Leafy Spurge Flea Beetles (07/11/13)

Leafy spurge flea beetles (Aphthona species) (Fig. 1) are an effective means of controlling leafy spurge in North Dakota.

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Protect Our Pollinators When Using Pesticides (07/03/13)

Agricultural production is in full swing in North Dakota, and flowering field crops or weeds in the field are important food sources of many species of pollinators, including honey bees and native bees.

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Wheat Midge Levels Dropped To Record Lows For 2013 (07/03/13)

Soil samples collected by the NDSU Extension Ag Agents in North Dakota indicated low levels of overwintering wheat midge larvae (cocoons) for the 2013 season. With the majority of soil samples statewide being low risk for wheat midge infestation, minimal insecticides should be needed for controlling wheat midge in most of the state in 2013.

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Soybean Aphids Slowly Increasing (07/03/13)

Our IPM Scouts are picking up low numbers of soybean aphids (< 80 aphids per plant) in Cass and Richland Counties. Soybean aphids are typically concentrated in the upper trifoliates until flowering.

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