1. The current damage situation of Dendroctonus ponderosaein BC, Canada and the researches which had been conducted by Canada were reviewed and discussed.

2. Red turpentine beetle ( Dendroctonus valens, RTB), which was probably introduced from USA, is one of the most important invasive pests in Chinese forest ecological system.

3. The Red turpentine bark beetle, Dendroctonus valens LeConte, is an invading pest of pines in China.

4. The generation and damage regulation of red turpentine beetle (Dendroctonus valens) are studied with the method of sample plot and tree-by-tree survey.

5. Ips and Dendroctonus are regarded as attacking bark beetle and all species bore and damage Pinus.

6. The biological characteristics of Dendroctonus ponderosae in BC, Canada was introduced from its distribution, parasitism , morphology, life cycle to its damage.

7. Dendroctonus valens is a dangerous insect pest of several pine species in China.

8. Dendroctonus is one group of most serious forest pests, all of which are economic species, and could directly cause great losses of forest resources.

9. Population dynamics of Dendroctonus valens at the egg stage, larval stage and adult stage in Shaanxi province was studied by lure-wood and indoor breeding.