1. General Model Information

Name: Northern Corn Rootworm Model of Norango and Sawyer


Main medium: terrestrial
Main subject: biogeochemistry
Organization level:
Type of model: not specified
Main application:
Keywords: pests, insect, corn rootworm


Fax :



The Northern Corn Rootworm Model of Norango and Sawyer (1989) is a process-oriented simulation model that examines the population dynamics of corn rootworm in the northern United States. The corn rootworm attacks both the roots and tassels of corn, decreasing yields. The model examines how planting date affects the population dynamics of the northern corn rootworm.

The model examines population dynamics using insect phenology equations. The model requires temperature, beginning insect density, and planting date of corn as input. The model provides information on the phenology of the corn plant and the number of insects on the plant in each growth stage. The model is currently a point model that uses hourly and daily time steps over a growing season.

Author of the abstract:


II. Technical Information

II.1 Executables:

Operating System(s): DOS

II.2 Source-code:

Programming Language(s): PASCAL

II.3 Manuals:

II.4 Data:

III. Mathematical Information

III.1 Mathematics

III.2 Quantities

III.2.1 Input

III.2.2 Output

IV. References

Norango, S.E., and A.J. Sawyer. 1989. A simulation model of northern corn rootworm, Diabrotica barberi,population dynamics, oviposition: significance of host-plant phenology.Can. Ent. 121:169-191.

V. Further information in the World-Wide-Web

VI. Additional remarks

Global change implications: Knowledge about the impact of global change on the population levels and distribution of the corn rootworm is important. Because corn is a high-value cash crop, knowledge of potential economic impacts are important.

Last review of this document by: 30.June 1997
Status of the document:
last modified by Tobias Gabele Wed Aug 21 21:44:48 CEST 2002

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