Links to these articles are strongly encouraged. Articles may be republished without further permission if published as written and if credit is given to the author, Integrated Crop Management News, and Iowa State University Extension and Outreach. If articles are used in any other manner, permission from the author is required.
By Rebecca Ahlers, Department of Agronomy and Erin Hodgson, Department of Entomology
While assessing corn stands for black cutworm and armyworm feeding, also consider assessing for wireworm activity. Wireworms injury can leave plants looking wilted or stunted, sometimes even leaving gaps in stands.
By Erin Hodgson, Department of Entomology and Adam Sisson, Integrated Pest Management
Common stalk borers are moving to corn in southern Iowa.
By Adam J. Varenhorst, Mike Dunbar, Erin Hodgson, Department of Entomology
Scouting for adult true armyworms should occur in May and June in fields that are minimum, no tilled, or contains a cover crop. Feeding occurs on the lower corn leaves and moves upwards, but true armyworms do not bore into stalks.
By Kiersten Wise, Purdue University; Daren Mueller, Iowa State University; Yuba Kandel, Iowa State University; Bryan Young, Purdue University; Bill Johnson, Purdue University; and Travis Legleiter, Purdue University
By Bob Hartzler and John Sawyer, Department of Agronomy
Corn planting progressed so quickly in many parts of the state that herbicide applications couldn’t keep up with the planters. Consider options before applying UAN.
By Adam Sisson, Integrated Pest Management; Laura Jesse, Plant and Insect Diagnostic Clinic; and Erin Hodgson, Department of Entomology
Scouting for black cutworm larvae helps to determine if an insecticide application will be cost effective.
By Meaghan Anderson, ISU Extension Field Agronomist, East Central Iowa
Palmer amaranth’s presence in the state is currently confirmed in five counties. Keep an eye out this summer for this weed with Iowa State’s identification resources.
