Investigators:
    Sunthorn Buranaviriyakul         Department of Agronomy
    Sombat Shechuvong                Department of Plant Pathology

Objective:
    The main objective of this diagnostic system is to collect as many soybean disease or disease-like symptoms that occur in Thailand as possible, eventhough some of them may not have any economic significance. Hopefully, it will be of some use for research agronomist and, especially, agricultural extensionist who are not familiar with soybean diseases.

System description:
    This is not a databased system but a rule-based expert system using heuristic knowledge. It was developed by using the expert shell of EXSYS Professional for Windows v5. The knowledge base was written in Thai, now in version 1.0.
    The detail information about the characteristics of symptom was derived mainly from the field experiments and any symptoms not occur in the field were obtained from literature and plant pathologist. At present, the system is mainly concerned with plant diseases and only few cases deal with plant nutrient deficiency, insect and chemical injuries which had happened in the experiment. Since the system was developed for non-plant pathologist, it does not require laboratory analysis in all cases that have a distinct visual symptom it requires only a hand-held magnifier and a small pocket-knife. For other cases some information about the surroundings is needed.

Output:
    It lists any possible causes of symptom, provides control recommendations for serious cases, and in many cases showing a picture.

Source of Funding: Thailand Research Fund (TRF)
Duration:  May 1996 - April !999
For more information please contact: Soonthorn Buranaviriyakul
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