ISHS Acta Horticulturae 200: II International Symposium on Processing Tomatoes, XXII IHC
A PHYSIOLOGICAL BASED MODEL FOR PROCESSING TOMATOES: CROP AND PEST MANAGEMENT |
| Authors: | L.T. Wilson, R. Tennyson, A.P. Gutierrez, F.G. Zalom |
| Abstract:
A physiologically based model has been developed for use in addressing crop and pest management decisions in processing tomatoes. TOMSIM is initialized with planting date, seedling rate, initial soil moisture, organic matter, and nitrogen status. A daily time step is used throughout the model, except in calculating photosynthesis, water and nitrogen uptake, where daily maximum and minimum temperatures, and solar radiation are converted to hourly canopy or soil values. The crop model and two currently developed pest models (tomato fruitworm and beet armyworm) use a time varying distributed delay framework enabling the incorporation of developmental variability. From a crop and pest management perspective, relevant output includes numbers of buds, flowers, different ages of fruit, cumulative yield, and crop maturation through time. Preliminary validation runs of TOMSIM indicate potential for use in optimizing decisions dealing with timing (and rates) of irrigation, fertilization (nitrogen), and fruitworm and beet armyworm control decisions. | |
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