1. General Model Information

Name: Hopper Decision Support System

Acronym: HOPPER

Main medium: terrestrial
Main subject: populationdynamics
Organization level: landscape
Type of model: not specified, static-algebraic equations
Main application: decision support/expert system
Keywords: rangeland, grasshopper population,


Jim Berry
Rangeland Insect Lab
Bozeman, MT 59717-0366
Phone: 406-994-3344
Fax: 406-994-3566
email: Berry@ril.usda.montana.edu



The Hopper Decision Support System (HDSS) is an expert system designed to examine management strategies on rangeland grasshopper populations in the Western United States. It is currently used by USDA-APHIS to delimit quarantine blocks in large areas of grasshopper populations. Users of the model provide grassland grasshopper species densities, weather and location information to the model. Life stages of grasshoppers are simulated over time and economic options are provided to the user (e.g. when to sell cattle or buy hay).

Author of the abstract:


II. Technical Information

II.1 Executables:

Operating System(s): TBM PCs

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

Davis, et al. 1992. "The economic threshold for grasshopper control onpublic rangelands". Journal of Ag. and Res. Econ. 17: 56-65.
Berry, et al. 1992. "Hopper DecisionSupport System: Rangeland grasshopper management for the 1990's". Fourth InternationalConference on Computers in Agriculture Exten, ASAE.

V. Further information in the World-Wide-Web

VI. Additional remarks

This model can be used to examine economic consequences of largepopulation changes in grasshopper populations in the western United States. This model is currently being used to examine the effectiveness of twograsshopper fungal pathogens on grasshopper populations.

Source : CIESIN Report

Last review of this document by: 10.7. 1997
Status of the document:
last modified by Tobias Gabele Wed Aug 21 21:44:44 CEST 2002

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