IPM Threshold Guide for Agronomic Field Crops
This reference was adapted from the University of Maryland and Delaware Cooperative Extension Filed Crop and Vegetable IPM Pest Management Manuals.
Compiled R. D. Myers 2000; Updated 2009: Updated 2017.
Compilation and layout assistance by Carol Jelich, Master Gardener, Anne Arundel County.
Reviewed by Galen Dively, Terrance Patton, and Sandra Sardenelli University of Maryland, College Park.
Level of pest activity when control action is suggested to prevent economic injury.