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Tang Lufa. Survey on Monochamus alternatus injury and distribution regularity in Qiandao Lake area.[J]. Journal of Zhejiang A&F University, 1998, 15(2): 176-180.
Citation: Tang Lufa. Survey on Monochamus alternatus injury and distribution regularity in Qiandao Lake area.[J]. Journal of Zhejiang A&F University, 1998, 15(2): 176-180.

Survey on Monochamus alternatus injury and distribution regularity in Qiandao Lake area.

  • Received Date: 1997-09-15
  • Publish Date: 1998-06-20
通讯作者: 陈斌, bchen63@163.com
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Survey on Monochamus alternatus injury and distribution regularity in Qiandao Lake area.

Abstract: Monochamus alternatus is widely distributed over Qiandao Lake area, causing serious injury to pine trees. The rate of pest-insect infection is 8. 4% , with a death rate o f 6. 0% . The average density is 99. 1~ 155. 8 pests perplant, and the highest density reaches 544 pestsper plant. The pests a remostly dist ributed in the crowns of the pines, with gradual deduction of pest number from above to below. The south /north ratio of distribution is 60. 8: 39. 2. The number of pest s inside timber takes up 81. 9% of the number o f the invaded holes, which indicates a natural death rate of 18. 1% .

Tang Lufa. Survey on Monochamus alternatus injury and distribution regularity in Qiandao Lake area.[J]. Journal of Zhejiang A&F University, 1998, 15(2): 176-180.
Citation: Tang Lufa. Survey on Monochamus alternatus injury and distribution regularity in Qiandao Lake area.[J]. Journal of Zhejiang A&F University, 1998, 15(2): 176-180.

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