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Geostatistical Analysis of Spatial Distribution of Endoclita signifer Larvae on Eucalyptus

Received: 14 October 2018    Accepted: 10 November 2018    Published: 24 December 2018
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Abstract

Endoclita signifer is a native wood borer species adapted to infest Eucalyptus in Guangxi of China. To better understand its spatial distribution in Eucalyptus forests, geostatistical approach was employed to analyze survey data of small scale (plantation level) and large scale (provincial level). The small scale results showed that the spatial distribution pattern was clumped regardless of infestation level. But the distance of spatial dependence was different with different infestation levels. These distances were 20.0 m, 40.3 m and 69.4 m for light, moderate and severe infestation levels, respectively. This indicated that as infestation level increased, the spatial distribution was less clumped. At the large scale level, the spatial distribution pattern was random when infestation was light. At the moderate and severe infestation level, the distribution pattern was clumped. The distance of spatial dependence was 43.6 km, 15.5 km and 12.47 km for light, moderate and severe infestation, respectively. This trend was opposite to that of the small scale. The large scale survey results reflected the occurrence of E. signifer in Guangxi province. Eucalyptus trees are cultivated in every county of Guangxi. Plantations with light infestation were scattered in a random pattern across the province. Moderate and severe infested plantations were mainly distributed in the central and southern areas of the province where Eucalyptus cultivation has longer history compared to other areas. Furthermore, the distance of spatial dependence was 17.4 km and 21.3 km for the 2nd generation forests (ratoon) and the 1st generation forests (established via seedlings), respectively. The observed spatial distribution patterns of E. signifer larvae seemed closely related to its biology and its successful adaptation to attack exotic Eucalyptus. These results provide fundamental knowledge for forecasting and evaluating E. signifer infestation and damage of Eucalyptus forests.

Published in American Journal of Agriculture and Forestry (Volume 6, Issue 6)
DOI 10.11648/j.ajaf.20180606.20
Page(s) 226-236
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This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

Endoclita signifer, Spatial Distribution Pattern, Geostatistics, Eucalyptus

References
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  • APA Style

    Xiuhao Yang, Jianglin Qin, Youqing Luo, Zhongwu Yang, Jiguang Wei. (2018). Geostatistical Analysis of Spatial Distribution of Endoclita signifer Larvae on Eucalyptus. American Journal of Agriculture and Forestry, 6(6), 226-236. https://doi.org/10.11648/j.ajaf.20180606.20

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    ACS Style

    Xiuhao Yang; Jianglin Qin; Youqing Luo; Zhongwu Yang; Jiguang Wei. Geostatistical Analysis of Spatial Distribution of Endoclita signifer Larvae on Eucalyptus. Am. J. Agric. For. 2018, 6(6), 226-236. doi: 10.11648/j.ajaf.20180606.20

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    AMA Style

    Xiuhao Yang, Jianglin Qin, Youqing Luo, Zhongwu Yang, Jiguang Wei. Geostatistical Analysis of Spatial Distribution of Endoclita signifer Larvae on Eucalyptus. Am J Agric For. 2018;6(6):226-236. doi: 10.11648/j.ajaf.20180606.20

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  • @article{10.11648/j.ajaf.20180606.20,
      author = {Xiuhao Yang and Jianglin Qin and Youqing Luo and Zhongwu Yang and Jiguang Wei},
      title = {Geostatistical Analysis of Spatial Distribution of Endoclita signifer Larvae on Eucalyptus},
      journal = {American Journal of Agriculture and Forestry},
      volume = {6},
      number = {6},
      pages = {226-236},
      doi = {10.11648/j.ajaf.20180606.20},
      url = {https://doi.org/10.11648/j.ajaf.20180606.20},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajaf.20180606.20},
      abstract = {Endoclita signifer is a native wood borer species adapted to infest Eucalyptus in Guangxi of China. To better understand its spatial distribution in Eucalyptus forests, geostatistical approach was employed to analyze survey data of small scale (plantation level) and large scale (provincial level). The small scale results showed that the spatial distribution pattern was clumped regardless of infestation level. But the distance of spatial dependence was different with different infestation levels. These distances were 20.0 m, 40.3 m and 69.4 m for light, moderate and severe infestation levels, respectively. This indicated that as infestation level increased, the spatial distribution was less clumped. At the large scale level, the spatial distribution pattern was random when infestation was light. At the moderate and severe infestation level, the distribution pattern was clumped. The distance of spatial dependence was 43.6 km, 15.5 km and 12.47 km for light, moderate and severe infestation, respectively. This trend was opposite to that of the small scale. The large scale survey results reflected the occurrence of E. signifer in Guangxi province. Eucalyptus trees are cultivated in every county of Guangxi. Plantations with light infestation were scattered in a random pattern across the province. Moderate and severe infested plantations were mainly distributed in the central and southern areas of the province where Eucalyptus cultivation has longer history compared to other areas. Furthermore, the distance of spatial dependence was 17.4 km and 21.3 km for the 2nd generation forests (ratoon) and the 1st generation forests (established via seedlings), respectively. The observed spatial distribution patterns of E. signifer larvae seemed closely related to its biology and its successful adaptation to attack exotic Eucalyptus. These results provide fundamental knowledge for forecasting and evaluating E. signifer infestation and damage of Eucalyptus forests.},
     year = {2018}
    }
    

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  • TY  - JOUR
    T1  - Geostatistical Analysis of Spatial Distribution of Endoclita signifer Larvae on Eucalyptus
    AU  - Xiuhao Yang
    AU  - Jianglin Qin
    AU  - Youqing Luo
    AU  - Zhongwu Yang
    AU  - Jiguang Wei
    Y1  - 2018/12/24
    PY  - 2018
    N1  - https://doi.org/10.11648/j.ajaf.20180606.20
    DO  - 10.11648/j.ajaf.20180606.20
    T2  - American Journal of Agriculture and Forestry
    JF  - American Journal of Agriculture and Forestry
    JO  - American Journal of Agriculture and Forestry
    SP  - 226
    EP  - 236
    PB  - Science Publishing Group
    SN  - 2330-8591
    UR  - https://doi.org/10.11648/j.ajaf.20180606.20
    AB  - Endoclita signifer is a native wood borer species adapted to infest Eucalyptus in Guangxi of China. To better understand its spatial distribution in Eucalyptus forests, geostatistical approach was employed to analyze survey data of small scale (plantation level) and large scale (provincial level). The small scale results showed that the spatial distribution pattern was clumped regardless of infestation level. But the distance of spatial dependence was different with different infestation levels. These distances were 20.0 m, 40.3 m and 69.4 m for light, moderate and severe infestation levels, respectively. This indicated that as infestation level increased, the spatial distribution was less clumped. At the large scale level, the spatial distribution pattern was random when infestation was light. At the moderate and severe infestation level, the distribution pattern was clumped. The distance of spatial dependence was 43.6 km, 15.5 km and 12.47 km for light, moderate and severe infestation, respectively. This trend was opposite to that of the small scale. The large scale survey results reflected the occurrence of E. signifer in Guangxi province. Eucalyptus trees are cultivated in every county of Guangxi. Plantations with light infestation were scattered in a random pattern across the province. Moderate and severe infested plantations were mainly distributed in the central and southern areas of the province where Eucalyptus cultivation has longer history compared to other areas. Furthermore, the distance of spatial dependence was 17.4 km and 21.3 km for the 2nd generation forests (ratoon) and the 1st generation forests (established via seedlings), respectively. The observed spatial distribution patterns of E. signifer larvae seemed closely related to its biology and its successful adaptation to attack exotic Eucalyptus. These results provide fundamental knowledge for forecasting and evaluating E. signifer infestation and damage of Eucalyptus forests.
    VL  - 6
    IS  - 6
    ER  - 

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Author Information
  • Department of Guangxi Forestry Pest Management, Bureau of Guangxi Forestry, Nanning, China

  • Guangxi Institute of Meteorological Disaster-Reducing Research, Nanning, China

  • Forestry College, Beijing Forestry University, Beijing, China

  • Forestry Pest Management Station of Guiling Districts, Guiling, China

  • Agriculture College, Guangxi University, Nanning, China

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