Crop & Pest Report

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Entomology

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Scout For Barley Thrips (07/03/13)

Barley thrips have been found in Ward, Cass, and Linton Counties and central ND near Rugby. Some fields have high numbers of barley thrips (>5 thrips per stem) while other fields are still low in numbers (0-3 thrips per stem).

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Be Aware of Ticks! (06/27/13)

Tick season is well underway, and we have received several samples from area clinics and the general public.

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Heavy Rains Impact Soybean Aphids (06/27/13)

Soybean aphids can be washed off soybean leaves and killed during heavy rain events, especially when plants are still in the vegetative stage and there is little canopy closure.

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Hessian Fly Observed in Spring Wheat (06/27/13)

Hessian fly was observed in spring wheat plantings at the Langdon REC (Source: Dr. Gautam, LREC). Hessian fly is an occasional insect pest problem of wheat in North Dakota.

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Cereal Aphids Present in both ND and MN this Past Week (06/27/13)

Cereal aphids (mostly English grain aphids) have been reported from small grains in SW, SC and WC MN, and from SE, EC and NC ND (Sources: IPM Scouts for ND and MN, and Dr. Chapara at NCREC, Minot, ND).

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Sugarbeet Root Maggot: Fly Numbers Surge, Peak Imminent (06/20/13)

Significant increases in sugarbeet root maggot (SBRM) fly activity have been observed at several of our monitoring sites in the past few days.

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Insect Scouting Reports (06/20/13)

Cereal Aphids: Incidence of cereal aphids is generally still low and ranged from 0 to 29% this past week. Alfalfa Weevils: Larger larvae (≈⅜ inch) are being observed in alfalfa now. Flea Beetles: Some canola fields in Langdon and Minot areas are being treated with foliar rescue insecticides for needed protection against flea beetles.

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Aster Leafhoppers Have Arrived (06/20/13)

Aster leafhoppers, Macrosteles quadrilineatus, have arrived in low numbers in North Dakota.

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Soybean Aphids are Here (06/20/13)

The NDSU IPM Scout in the northeast region of North Dakota found one field in Cass County with soybean aphids.

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Sugarbeet Root Maggot: Emergence off to a Slow Pace (06/13/13)

Sugarbeet root maggot (SBRM) fly activity is being monitored this year in a collaborative project between NDSU Entomology, American Crystal Sugar Company, the MinnDak Farmers Cooperative, and the Pembina County (ND) Extension office.

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Scout Canola for Flea Beetle Activity (06/13/13)

Insecticidal seed treatments for canola may not be giving adequate protection this year due to the cool, wet weather we have been experiencing, especially in the northeastern part of the state.

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Soybean Aphids in Midwest (06/13/13)

Extension entomologists have reported soybean aphids in southern Wisconsin, northeast Iowa, Illinois, Indiana, Michigan and Ohio. Soybean aphids (<10% incidence and < 9 aphids/plant) were just detected in Minnesota on June 11 near Rosemount (Source: R. Koch, UMN). No soybean aphids have been reported in South Dakota.

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Alfalfa Weevil Larval Feeding Observed (06/13/13)

County Extension Agents and fields scouts are observing adult alfalfa weevils, small larvae (<⅛ inch), and small holes in the foliage of alfalfa.

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USDA and EPA Release New Report on Honey Bee Health (05/29/13)

The U.S. Department of Agriculture (USDA) and the U.S. Environmental Protection Agency (EPA) today released a comprehensive scientific report on honey bee health. The report states that there are multiple factors playing a role in honey bee colony declines, including parasites and disease, genetics, poor nutrition and pesticide exposure.

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Scout for Cereal Aphids and Grasshoppers (06/13/13)

The IPM Scouts have detected cereal aphids and grasshopper nymphs in southern North Dakota. This is a good time to intensify your scouting efforts for cereal aphids in wheat, durum and barley, and for grasshoppers in any crop.

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Sugarbeet Root Maggot: Fly Activity to Be Later than Usual (06/06/13)

The first detections of sugarbeet root maggot (SBRM) flies by NDSU personnel occurred last week near Thompson and Reynolds, ND in the central portion of the Red River Valley (RRV).

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Collecting and Submitting Potential Japanese Beetle Larva Samples (06/06/13)

Japanese beetle adults were found at several locations in North Dakota in 2012, including Fargo, West Fargo, Grand Forks, Bismarck, Minot, Oakes, Taylor and rural Foster County.

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Red Velvet Mites on Soil (06/06/13)

The brightly colored red velvet mites have been observed crawling around on the soil of fields. These mites belong to the mite family Trombidiidae.

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Grasshopper Forecast (06/06/13)

Cool, wet weather is not favorable for grasshoppers and causes increased disease and mortality. Grasshopper hatch is usually underway by now, but the cool temperatures have delayed hatching. If you see the common lilac beginning to bloom, this is an indicator of when grasshopper emergence should be starting.

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Early Arrival of Cereal Aphids in Minnesota (06/06/13)

Cereal aphids have been detected in fields from Fergus Falls to Morris and in southwest Minnesota at low densities of 3-5 aphids per plant and <35% incidence (Sources: B. Potter, D. Holen and P. Glogoza, UMN).

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