Overview and Objectives- CRW Part 1

This lesson will discuss the corn rootworm complex, which consists of the northern, western, and southern corn rootworm, focusing on the northern and western species. The information in this lesson will focus on the biology of corn rootworms in the north central Corn Belt, including Iowa and Nebraska. Crop producers, crop scouts, students, and the general public may find the information in this lesson helpful for identifying corn rootworm, other corn pests, and the feeding damage caused by each insect.  At the end of this lesson readers should be able to:

  • Identify the corn rootworm (CRW) and describe the CRW life cycle and behavior
  • Describe damage and subsequent injury caused by CRW
  • Explain the root injury rating scale
  • Explain how biological and environmental factors influence CRW
  • Identify the other early season soil insect pests

Copyright 2003

This production is made possible in part through the University of Nebraska Institute of Agriculture and Natural Resources (IANR) and through funding from Monsanto Company. Any opinions, findings, conclusions, or recommendations expressed in this series are those of the authors and do not necessarily reflect the view of IANR. This manuscript has been assigned Journal Series No. 04-07, College of Agricultural Sciences and Natural Resources, University of Nebraska.