Category Archives: Insects & Mites

Japanese Beetle – Scouting and Thresholds for Soybean and Corn

Japanese Beetle – Scouting and Thresholds for Soybean and Corn Eileen Cullen, Extension Entomologist Questions have come in this week concerning Japanese beetle on soybean and corn. There is one generation of Japanese beetle per year and we typically see … Continue reading

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Western Bean Cutworm Moth Flight Has Begun

Western Bean Cutworm Moth Flight Has Begun Eileen Cullen, Extension Entomologist The annual flight of western bean cutworm (WBC) moths began this past week. The first moths of the season were recorded June 23-29 in Adams, Calumet, Iowa, Marquette and Sauk … Continue reading

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Brown Marmorated Stink Bug

Brown Marmorated Stink Bug Bryan Jensen, IPM Program The Brown Marmorated Stink Bug (BMSB), Halymorpha halys, is an invasive, exotic insect pest recently introduced into the United States (Pennsylvania, 2001), and even more recently in Wisconsin. The first detections of BMSB … Continue reading

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Biological Control Parasitoid Released for Emerald Ash Borer Does not Harm Honeybee Colonies

Biological Control Parasitoid Released for Emerald Ash Borer Does not Harm Honeybee Colonies Eileen Cullen, Extension Entomologist Entomolgists with University of Wisconsin-Madison and USDA APHIS have initiated a biological control program for Emerald Ash Borer. Like other classical biological control … Continue reading

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Western Bean Cutworm Egg Masses and Larval Hatch- Scout Field and Processing Sweet Corn Fields

Western Bean Cutworm Egg Masses and Larval Hatch- Scout Field and Processing Sweet Corn Fields Eileen Cullen, Extension Entomologist Careful field scouting in field corn and processing sweet corn for western bean cutworm egg masses and small larvae should begin … Continue reading

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Scout Soybean for Soybean Aphid

Scout Soybean for Soybean Aphid Eileen Cullen, Extension Entomologist Soybean aphids have been present on soybean at low levels (below the economic threshold of 250 aphids per plant) at various locations in the state for the last couple of weeks. … Continue reading

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Black Cutworm Feeding on Corn – Out of the Woods Yet?

Black Cutworm Feeding on Corn – Out of the Woods Yet? Eileen Cullen, Extension Entomologist Black cutworm (BCW) larvae are in the larger stages (4th to 6th instar) and corn in the V4-V6 stages from what I have seen in … Continue reading

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Black Cutworm Feeding on Bt Corn Technology

Black Cutworm Feeding on Bt Corn Technology Eileen Cullen, Extension Entomologist Reports of black cutworm feeding (chewing holes in leaves) and cut plants are coming, with two calls this week. Late planted corn is still smaller than V4-V5 making it … Continue reading

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True Armyworm Larva – Scout Corn and Wheat Fields

True Armyworm Larva – Scout Corn and Wheat Fields Eileen Cullen, Extension Entomologist The insect feeding activity report of note I received this week is that of true armyworm larvae on corn in LaCrosse County in Western Wisconsin. I have … Continue reading

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Update on Alfalfa Weevil and Potato Leafhopper as Alfalfa Transitions from First Crop Hay to Second Crop Growth

Update on Alfalfa Weevil and Potato Leafhopper as Alfalfa Transitions from First Crop Hay to Second Crop Growth Eileen Cullen, Extension Entomologist Alfalfa Weevil – Larval populations of alfalfa weevil have been gradually increasing in first crop alfalfa. The WDATCP … Continue reading

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