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Volume 7 Issue 3
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Article Navigation >  Forest Research  > 1994 >  7(3): 342-345

Citation:
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Stumes on Density Estimation for the Pine Caterpillar through Counting of Larvae on Short Trees

  • 1.

    Forest Pest Control Station, Zhejiang Forest Bureau, Hangzhou 310004

  • 2.

    Jinhua County Forest Pest Control Station of Zheiiana Province

  • 3.

    Jiangshan City Forest Pest Control Station of Zhejiang Province

  • 4.

    Branch Campus of Peking University

  • Received Date: 1992-12-10
  • Investigating method on density estimation for the pine caterpillar Dendrolimus punctatus through counting larvae on short pine trees was studied.The resultssliowed that the criterion for tall and short trees is 2.5m.The estimation of pest density inthe crown project area(larvae/m2) is not affected by forest stand conditions.When proportion of short trees is more than 40%, there is no significant differences between pest densityof tall trees and that of short trees.It's indicated that the estimation of pest density in thecrown project area (larvae/m2)is much better than that by larvae per tree.
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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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Stumes on Density Estimation for the Pine Caterpillar through Counting of Larvae on Short Trees

  • 1. Forest Pest Control Station, Zhejiang Forest Bureau, Hangzhou 310004
  • 2. Jinhua County Forest Pest Control Station of Zheiiana Province
  • 3. Jiangshan City Forest Pest Control Station of Zhejiang Province
  • 4. Branch Campus of Peking University
  • Received Date: 1992-12-10
  • Available Online: 2012-12-04

Abstract: Investigating method on density estimation for the pine caterpillar Dendrolimus punctatus through counting larvae on short pine trees was studied.The resultssliowed that the criterion for tall and short trees is 2.5m.The estimation of pest density inthe crown project area(larvae/m2) is not affected by forest stand conditions.When proportion of short trees is more than 40%, there is no significant differences between pest densityof tall trees and that of short trees.It's indicated that the estimation of pest density in thecrown project area (larvae/m2)is much better than that by larvae per tree.

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