1. General Model Information

Name: Simulation of damage by aphids in winter wheat


Main medium: terrestrial
Main subject: biogeochemistry
Organization level:
Type of model: not specified
Main application:
Keywords: crop protection, crop growth, winter wheat, aphid, Sitobion avenae


Dr.ir. W.A.H. Rossing
Wageningen Agricultural University
Dept. Theoretical Production Ecology
P.O.Box 430
6700 AK Wageningen
Phone: +31.8370.84766
Fax : +31.8370.84892
email: rossing@rcl.wau.nl



Growth and development of winter wheat during the post-anthesis phase is simulated as a function of injury by Sitobion avenae, the English grain aphid. The model applies to the time interval from flowering to ripeness which constitutes the main period of grain aphid immigration and development in winter wheat in the Netherlands. The crop model describes crop growth and development as a function of the prevailing weather and the available amount of soil nitrogen and consists of sink-source relations and distribution functions for carbohydrates and nitrogen. Injury by S.avenae affects crop growth both directly and indirectly. Direct effects on growth are due to aphid feeding. Indirect effects are caused by the aphid excretion product honeydew which affects leaf net carbon dioxide assimilation. Alternative hypotheses on the nature of the direct effects are formulated. Inputs to the model are average daily temperature, daily global radiation, the amount of nitrogen in the soil and the density on the aphid population. The major output is grain weight.

Author of the abstract:

CAMASE (Concerted Action for the development and testing of quantitative methods for research on Agricultural Systems and the Environment).

II. Technical Information

II.1 Executables:

Operating System(s): IBM compatible PC

II.2 Source-code:

Programming Language(s): PCSMP* in combination with TTSELECT* and BAT procedure * look for those in the CAMASE register

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

Rossing, W.A.H., 1991. Simulation of damage in winter wheat caused by the grain Sitobion avenae. 2.Construction and evaluation of a simulation model. Netherlands Journal of Plant Pathology 97, 25-54

V. Further information in the World-Wide-Web

VI. Additional remarks

Last review of this document by: 28. 08. 1997
Status of the document:
last modified by Joachim Benz Mon Jul 2 18:31:37 CEST 2007

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