Articles tagged under: Ian MacRae

Soybean Aphids Should be on Radar for ’25

Published April 25, 2025

Scouting for soybean aphids is recommended this season. University of Minnesota Extension Entomologist Ian MacRae said the temperatures may not have been cold enough to kill off overwintering soybean aphids. "The egg has to be exposed to -27 Fahrenheit to…
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Aphids Susceptible to Resistance

Published January 18, 2025

Insecticide resistance continues to be a focus. University of Minnesota Extension Entomologist Ian MacRae reminds farmers to stay up to date on their herbicide practices, especially where aphids are involved. "You see an asexual reproduction all the way through the…
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Bug Activity Increasing With Warmer Weather

Published August 1, 2024

Insect activity is picking up throughout the Upper Midwest. University of Minnesota Extension Entomologist Ian MacRae is seeing a lot of potato bug activity. "Insects, especially Colorado Potato Beetles, are really regional this year. Some places are seeing high, some…
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Managing Potato Superbugs

Published July 18, 2024

At the Crops and Soils Day in Crookston, University of Minnesota Extension Entomologist Ian MacRae outlined his research on the Colorado Potato Beetle. “They (Colorado Potato Beetles) can detoxify a lot of really nasty chemistries. It makes management really difficult.”…
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Weather Impacting Pest Population

Published June 22, 2024

University of Minnesota Extension Entomologist Ian MacRae is surprised by what he's been seeing, or not seeing, in the fields. "It seems to be an unusual year; I've had several calls on springtails and a couple of different insects, but…
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Problem Potato Pests

Published August 24, 2023

Colorado Potato Beetles require a certain amount of heat to break their winter dormancy. University of Minnesota Extension entomologist Ian MacRae saw the pest show up later than usual this season. "We had that early season heat before it got…
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Pest Problems

Published July 12, 2023

The early-season heat could impact pest management. According to University of Minnesota Entomology Professor Ian MacRae, the number of insect generations can be sped up in that scenario. “When that happens, it means you have a mixed population of caterpillars,…
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Leafhoppers Impact Multiple Crops

Published May 19, 2023

Northwest Research and Outreach Center Entomologist Ian MacRae says the leafhoppers are common this time of the year. "It's not unusual to see our populations move from here up into Canada." Aster leafhoppers are not usually a problem in wheat,…
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PVY Risk Higher Than Last Year

Published August 28, 2022

Late season insect populations are being monitored closely. University of Minnesota Extension entomologist Ian MacRae is watching the potato crop. "Our populations start to rise end of July and crank up in August." MacRae says there is a risk of…
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Aphid Numbers are Increasing

Published August 1, 2022

According to University of Minnesota Extension Entomologist Ian MacRae, aphid numbers are up, but remain less than half the level seen one year ago. Most of this past week’s trap catches were cereal aphids. Soybean aphids are also starting to…
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