1. General Model Information
Name: SORGHUM MIDGE SIMULATION MODEL
Acronym: ACN_TX
Main medium: terrestrial
Main subject: biogeochemistry
Organization level: ecosystem
Type of model: not specified
Main application:
Keywords: crop, pest, sorghum, sorghum midge, Contarinia sorghicola, Johnsongrass, population prediction, empirical equations, temperature sum based
Contact:
TAEX Software Catalog
Texas Agricultural Extension Service
Extension Computer Technology Group
College Station
Texas 77843-2468
USA
Phone: (409) 845-3929
Fax :
email:
Author(s):
Dr. John Jackman, Dr. N.D. Stone
PROGRAMMERS: Dr. John Jackman, Dr. N.D. Stone, Russell Herdejurgen
Abstract:
The Sorghum Midge Simulation Model (ACN) is a population model
that predicts local trends in population density of the sorghum
midge, Contarinia sorghicola (Coquillett). The model uses
weather data and local cropping information to make population
predictions. The predictions can be used for strategic planning
of planting dates and for within season predictions of control
dates.
Input to run the model consists of estimates of the following
information: planting date; field acreage; sorghum variety name;
latitude; first planting date for sorghum in the local area;
last planting date for sorghum in the local area; expected
severity rating; Johnsongrass infestation rating; percent of
total acres of sorghum in the local area; and estimated percent
of sorghum acres in five planting date classes.
This model calculates the density of two developmental stages,
eggs and adults, of the sorghum midge. Midge adults are assumed
to come from three sources: 1) spring emergence from diapause,
2) individuals that use Johnsongrass as a host, and 3)
individuals that use grain sorghum as a host.
Several simplifying assumptions about the environment are made.
Most important is the treatment of a growing region as
homogeneous. That is, midge populations respond to the
availability of sorghum plants as hosts within the entire region
rather than within localized fields of sorghum plants.
This model has been developed based on research of the biology
of the sorghum midge. However, the model as a whole has not had
extensive field evaluations in all areas where sorghum midge
occurs.
The program interfaces with the Weather Data Editor (ACJ) for
editing and storage of historical and current weather data.
Source of the Abstract:
SORGHUM MIDGE SIMULATION MODEL
II. Technical Information
II.1 Executables:
Operating System(s): DOS
II.2 Source-code:
Programming Language(s):
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
V. Further information in the World-Wide-Web
VI. Additional remarks
Last review of this document by: ,16. 06. 1997
Status of the document:
last modified by
Tobias Gabele Wed Aug 21 21:44:39 CEST 2002