Application of point count method in forest birds survey;

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.

A Meteorological Forecast Model for Forest Pests in Western Chongqing;

The measure will play a positive role in safeguarding the security of forest resources and reducing the loss of forest disasters.

The paper analyses constituent factor and distinction of forest disaster, and reason and status quo of forest disaster which include pests and diseases of forest,conflagration of forest,and denudation of forest,and point out that drive of benefit is fundamental reason of forest disaster.