Entomology, Department of


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University of Nebraska-Lincoln Department of Entomology Online Masters Program Final Project. Lincoln, Nebraska.


Copyright 2006 Bryon Van Ballegooyen


Objective The goal of this project was to determine the validity of the western bean cutworm, Richia albicosta (Noctuidae), growing degree day (GDD) model developed at the University of Nebraska with western bean cutworm flight and weather data collected in Iowa. The completed project will show if the current GDD model holds up when compared with data collected in Iowa from 2003 to 2005. The project will also show if more data needs to be collected and analyzed to further test the current GDD model.

Outcomes The outcomes of the project show that the previously developed GDD model for western bean cutworm is valid for populations in Iowa. However the data shows that the current model might not be as accurate as researchers would like. Considering the error is so large in the current model, more research is recommended to try to improve the accuracy of the model. Since the current model is relatively accurate in Iowa, it can reasonably be expected to be as accurate in other states where the range of the western bean cutworm is spreading to. With the growing economic importance of western bean cutworm in Iowa, and possibly other states, it is important to be able to predict accurately when western bean cutworm moth emergence can be expected so control options can be considered. In the end having an accurate GDD model for western bean cutworm will help growers control the pest and researchers to be able to focus their resources when studying the insect.

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