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2. Population characteristics ofDendrolims superans in Daxing’an Mountains

Author

Liu Kuanyu, Yang Xiaoguang, Meng QingFan, Yan Luguang, Hong Guoqi, and Lin Long

Subjects
education.field_of_study, Larva, Crown (botany), Population, Forestry, Biology, Pupa, Horticulture, Regular distribution, Botany, Instar, Age distribution, education, Sex ratio
Abstract

Dendrolims superans produced one generation every two years. Large larvae and small larvae exist at the same time. It broke out in Daxiang an Mountains in 1990, and seriously destroyed growth ofLarix gmelini Rupr. In order to controlD superans, the population properties ofD superans were studied from 1991 to 1992, including sexratio, age distribution, pattern etc.. The sex ratio ofD. superans population is ♀∶♂ − 1.06:L. The larvae age distribution indicates that larvae over 5 instar is less than younger larvae under 4 instar in Yongqing forest farm, but the younger larvae under 4 instar is more than larvae over 5 instar in Hanjiayuanzi Forest Farm. The population ofD. superans in Yongqing Farm has been declining. and mereasing in Hanjiayuanzi. Pupae and eggs are mainly distributed in middle and lower crowns layer of trees respeetively account for 66% and 59.5% of total individuals. The pupae in higher crown layer is lightly regular distribution and clumping distribution middle and lower crowns layer of trees. The eggs in higher crown is light clumping distribution and random in middle and low crown of tree.

Published
1997

3. "Latin American People Will Jointly Create a New History": Historical Interpretation of the Cumbre de la Unidad in Mexico.

Author

Hong Guoqi

Subjects
LATIN American economic integration, INTERNATIONAL economic integration, INTERNATIONAL relations, CONFERENCES & conventions
Abstract

The Unity Summit, or Cumbre de la Unidad, of Latin American and Caribbean Countries, held in Cancun, Mexico, on February 22 and 23, 2010, claimed clearly to advance toward an organization that encompasses all Latin-American and Caribbean States not including the United States, which is an epoch -- making historical event, heralding that "the Latin American people will jointly create a new history". It is the United States' policies to maintain its own national interests on the behalf of the "common interest" within the existing Pan- American Union that cause the Union to face the economic, political and security vulnerabilities and crises, which lay a solid foundation for an united Latin American and Caribbean Union without the United States. [ABSTRACT FROM AUTHOR]

Published
2013

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