The comprehensive management countermeasuresto forest harmful rats in Gansu province;

Popularization experiment of P-1 repellent against forest rodent pests;

Research and Realization of Forest Diseases, Pests and Mice Universal Management Information System Based on Web;

A test report on controlling forest rats by using Beiao male sterilant;

Based on the development of China s forestry and making good use of the data of forest calamities and the growth of forestry economy from 1952 to 2001, the paper analyses the impact of forest calamity on forestry economic growth in China, trying to explore, theoretically, the inherent correlation between the two factors.

According to the general calamity economic theory and research achievements,the writer discusses the problems of forest calamity economics with basic theories and principles,such as concepts,classifications and characteristics of forest calamity,subject and contents of forest calamity economic research,and fundamental theories of forest calamity economic research.

Developmental process of forest pest management and research direction in China;

The paper presents some main achievements made in the reserch of preventing the forest pest in Longdong,especially in Qingyang since 1980 from the aspects of insect variety and fauna,bionomics,ecology and control techniques.

Research progress in economic thresholds of several major forest pests such as Dendrolimus punctatus Walker,Anoplophora nobilis Ganglbauer and Gravitarmata margarotana(Hein) are discussed extensively from the aspects of endangered position,tree species harmed by forest pests,locations of pest damage occurrence and control indexes.