An Expert System For Management Of Insect Pests And Diseases And Safe Application Of Pesticides On Orange Orchard

Orange is planted in eighty countries of the world, and its yield is the largest of all kinds of fruits. Now the trouble that orange production meets is the yield decrease resulted from the damage of insect pests and diseases. In the south of China, the weather is very suit for orange growth. However, warm condition of the south also fit for development of insect pests and diseases. According to the report of FAO, there are more than ten kinds of insect pests and diseases that can cause orange larger losing, such as panonychus citri, Phyllocnistis cotre.Ua and SO on.Using pesticides to control insect pests and diseases is a major way of Integrated Pest Management (IPM). Many chemical pesticides, however, are poisonous to human, animals and environment, especially highly toxic and persistent ones in the environment. With the development of economy and improvement of living level, it becomes a problem that needs to be urgently solved how to direct users applying pesticides economically, effectively, safely and reasonably.Information technology is developing in all kinds of fields in recent years. Expert systems are applied in agricultural production and management more and more popular. An expert system for safe application of pesticides on orange orchard is developed, which includes the risk assessment of pesticidesafter employing to orchard. This is a ruler-based system. According to the dialogue of user-computer, user can obtain some solutions for their problems, such as identifying of insect pests, decision-making for management of insect pests and diseases, forecasting the development of insect pests on orchard and so on. Under the condition of need using pesticides, the system will run risk assessment model to evaluate and rank available pesticides so as to direct users how to safe application of pesticides.