Insects & Mites

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 …

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 …

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 …

Soybean Aphid Scanty on Buckthorn in the Upper Midwest Eileen Cullen, Extension Entomologist Data from the North Central Regional Soybean Aphid Suction Trap Network sheds light each year on 1) abundance of soybean aphid migrating …

Early Season Insect Calendar: Seed Corn Maggot Eileen Cullen, Extension Entomologist Please see last week’s Wisconsin Crop Manager Vol. 18(8) for a black cutworm scouting alert in corn from emergence through V5 stage. Remember to …

Black Cutworm Damage Potential for Corn Eileen Cullen, Extension Entomologist Corn planting and weed control delayed by wet field conditions coupled with a major black cutworm migration make black cutworm damage a likely event later …

Latest Bt Corn Approval by EPA includes 5% Refuge In the Bag Eileen Cullen, Extension Entomologist The EPA recently approved a 5% refuge-in-the-bag (RIB) Bt Corn.  This registration is a licensing agreement between Monsanto and …

IRM Calculator Helps Growers Plant the Right Refuge for the Right Bt Corn Hybrid Eileen Cullen, Extension Entomologist In 2011, more corn hybrids contain multiple Bt traits for insect control or suppression. Refuge requirements have …