**1. Introduction**

320 The Dynamical Processes of Biodiversity – Case Studies of Evolution and Spatial Distribution

Zhang, C., Druzhinina, I., Kubicek, C., & Xu, T. (2005). *Trichoderma* biodiversity in China:

11, (August 2000), pp. 863-873, ISSN 0981-9428.

*Trichoderma harzianum* strain T-203. *Plant Physiology and Biochemistry*. Vol. 38, No.

evidence for a North to South distribution of species in East Asia. *FEMS Microbiology Letters*. Vol. 251, No. 2, (August 2005), pp.251-257, ISSN 1574-6968.

> As the major forestry pest insects in China, *Dendrolimus* included *Dendrolimus punctatus*  Walker, *D. punctatus tabulaeformis* Tsai *et* liu, *D. punctatus spectabilis* Butler, *D. superans* Butler, *D. houi* Lajonquiere and *D. kikuchii* Matsumura. During sequential outbreaks, economical damage can be so extensive for forest appears to be burned and unable to withstand such a long period of defoliation. Gene diversity and genetic structure among the main species of *Dendrolimus* were assessed using morphological diversities, allozyme, Random Amplified Polymorphism DNA(RAPD), Amplified Fragment Length Polymorphism (AFLP), Inter-Simple Sequence Repeat (ISSR), mitochondrial DNA and Simple Sequence Repeat (SSR), which provide the powerful tool for investigation of genetic variation. The influence of ecological factors on the genetic diversity is also discussed by the correlation analysis.
