| Popis: |
The essay collects the survey data in recent years of each province's plant prevention station in our country and analyses the experimental results of all national apple comprehensive experimental stations according to the principle and method of quantification theory I. It selects variety resistance, phenophase, the degree of disease, the climate of the first few days, the climate of the next few days, whether drug-use in early stage, the degree of disease in previous years as qualitative variables and establishes the evaluation scoring model for apple diseases and pests prevention decision based on the quantification theory, as a result, the fitting effect is rather good. To build a web-based decision system about Apple pest control, then it can provide application services through Apple IPM information network of China. |
