Econometric Analysis of Documents Relating to Prevalence of Apple Ring Rot

After retrieving all papers with the theme of " apple ring rot" from 1994 to 2010,the article made a statistical analysis on locations,occurrence degree,regularity,prevention and treatments of apple ring rot according to published time.The results showed that the occurrence degree of apple ring rot increased year by year,and were uneven among the major apple producing areas with a trend of spreading gradually from east to west.Researchers had paid more attention to control and pharmaceutical experiments of ring rot,while the studies on basic research,projections and forecasts of the disease were not enough.Some prevention and control recommendations of apple ring rot were proposed based on the detailed analysis.