Primary insect pest occurrence and tree diversity in stands of <em>Pinus kesiya</em> var. <em>langbianensis </em>

YAN Zheng-liang; LIU Yun-cai; HU Guang-hui; LIU Yong-gang; MENG Meng

doi:10.11833/j.issn.2095-0756.2012.02.012

Volume 29 Issue 2

Mar. 2012

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YAN Zheng-liang, LIU Yun-cai, HU Guang-hui, LIU Yong-gang, MENG Meng. Primary insect pest occurrence and tree diversity in stands of Pinus kesiya var. langbianensis [J]. Journal of Zhejiang A&F University, 2012, 29(2): 226-231. doi: 10.11833/j.issn.2095-0756.2012.02.012

Citation:

YAN Zheng-liang, LIU Yun-cai, HU Guang-hui, LIU Yong-gang, MENG Meng. Primary insect pest occurrence and tree diversity in stands of Pinus kesiya var. langbianensis [J]. Journal of Zhejiang A&F University, 2012, 29(2): 226-231. doi: 10.11833/j.issn.2095-0756.2012.02.012

Primary insect pest occurrence and tree diversity in stands of Pinus kesiya var. langbianensis

doi: 10.11833/j.issn.2095-0756.2012.02.012

1.
Yunnan Key Laboratory of Forest Plant Cultivation and Utilization/Yunnan Laboratory for Conservation of Rare，Endangered and Endemic Forest Plants，Yunnan Academy of Forestry，Kunming 650204，Yunnan，China

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Corresponding author: YAN Zheng-liang
Received Date: 2011-05-21
Rev Recd Date: 2011-08-03
Publish Date: 2012-04-20

Abstract

In order to understand the impact of increasing woodland plant diversity on degrees of insect pest occurrence，plant diversities of different deposition models for Pinus kesiya var. langbianensis plantations and the occurrence degrees of the three primary pests：Dendrolimus kikuchii，Retinia cristata and Dioryctria rubella were investigated from 2009 to 2010 in Simao County and Jinggu County，Yunnan Province. Plant diversities in different plantations were denoted by Shannon index，and the species evenness were denoted by Pielou index. Insect occurrence degree were denoted by percentage of insect-infesting trees. Results showed that the Shannon index for mixed stands of P. kesiya var. langbianensis versus Schima wallichii，Betula alnoides，Altingia chinensis，or stands of pine mixed with hardwoods was higher than monoculture pine stands. However，tree stands of higher Shannon index dose not necessarily have a higher Pielou indices. The occurrence degrees of the three main insect pests decreased with the increased of Shannon indices. In Qingshuihe of Simao County，the occurrence degree of Dendrolimus kikuchii （y = －29.929x + 70.61，R2 = 0.966 7；y = －14.57 8x + 34.213，R2 = 0.974 9） and Dioryctria rubella（y = －8.872 7x + 20.627，R2 = 0.994 6；y = －8.652 9x + 20.215，R2 = 0.935 1） showed good linear relationship with the Shannon indices of tree layer，whereas that of Retinia crstata showed good linear relationship with the Shannon indices of shrub layer. （y = －5.672 7x + 14.964，R2 = 0.835 8；y = －4.4756x + 12.27，R2 = 0.838 1）. In Wenlang of Jinggu County，there were also good linear relationship between occurrence degree of Dendrolimus kikuchii（y = －55.454x + 135.16，R2 = 0.954 1） or Dioryctria rubella （y = －23.895x + 57.907，R2 = 0.983 1） with Shannon index of tree layer. Appropriately increasing tree species diversity in plantations can reduce the incidence of insect pests.［Ch，5 fig. 3 tab. 8 ref.］
- forest protection,
- Pinus kesiya var. langbianensis,
- tree diversity,
- pest occurrence degree

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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Primary insect pest occurrence and tree diversity in stands of Pinus kesiya var. langbianensis

1. Yunnan Key Laboratory of Forest Plant Cultivation and Utilization/Yunnan Laboratory for Conservation of Rare，Endangered and Endemic Forest Plants，Yunnan Academy of Forestry，Kunming 650204，Yunnan，China

Corresponding author: YAN Zheng-liang

Received Date: 2011-05-21

Rev Recd Date: 2011-08-03

Publish Date: 2012-04-20

Key words:

Abstract: In order to understand the impact of increasing woodland plant diversity on degrees of insect pest occurrence，plant diversities of different deposition models for Pinus kesiya var. langbianensis plantations and the occurrence degrees of the three primary pests：Dendrolimus kikuchii，Retinia cristata and Dioryctria rubella were investigated from 2009 to 2010 in Simao County and Jinggu County，Yunnan Province. Plant diversities in different plantations were denoted by Shannon index，and the species evenness were denoted by Pielou index. Insect occurrence degree were denoted by percentage of insect-infesting trees. Results showed that the Shannon index for mixed stands of P. kesiya var. langbianensis versus Schima wallichii，Betula alnoides，Altingia chinensis，or stands of pine mixed with hardwoods was higher than monoculture pine stands. However，tree stands of higher Shannon index dose not necessarily have a higher Pielou indices. The occurrence degrees of the three main insect pests decreased with the increased of Shannon indices. In Qingshuihe of Simao County，the occurrence degree of Dendrolimus kikuchii （y = －29.929x + 70.61，R2 = 0.966 7；y = －14.57 8x + 34.213，R2 = 0.974 9） and Dioryctria rubella（y = －8.872 7x + 20.627，R2 = 0.994 6；y = －8.652 9x + 20.215，R2 = 0.935 1） showed good linear relationship with the Shannon indices of tree layer，whereas that of Retinia crstata showed good linear relationship with the Shannon indices of shrub layer. （y = －5.672 7x + 14.964，R2 = 0.835 8；y = －4.4756x + 12.27，R2 = 0.838 1）. In Wenlang of Jinggu County，there were also good linear relationship between occurrence degree of Dendrolimus kikuchii（y = －55.454x + 135.16，R2 = 0.954 1） or Dioryctria rubella （y = －23.895x + 57.907，R2 = 0.983 1） with Shannon index of tree layer. Appropriately increasing tree species diversity in plantations can reduce the incidence of insect pests.［Ch，5 fig. 3 tab. 8 ref.］

Primary insect pest occurrence and tree diversity in stands of Pinus kesiya var. langbianensis

doi: 10.11833/j.issn.2095-0756.2012.02.012

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

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Proportional views

Primary insect pest occurrence and tree diversity in stands of Pinus kesiya var. langbianensis

doi: 10.11833/j.issn.2095-0756.2012.02.012

1. Yunnan Key Laboratory of Forest Plant Cultivation and Utilization/Yunnan Laboratory for Conservation of Rare，Endangered and Endemic Forest Plants，Yunnan Academy of Forestry，Kunming 650204，Yunnan，China

Corresponding author: YAN Zheng-liang

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Primary insect pest occurrence and tree diversity in stands of Pinus kesiya var. langbianensis

doi: 10.11833/j.issn.2095-0756.2012.02.012

Abstract

Relative Article

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通讯作者: 陈斌, bchen63@163.com

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Proportional views

Primary insect pest occurrence and tree diversity in stands of Pinus kesiya var. langbianensis

doi: 10.11833/j.issn.2095-0756.2012.02.012

1. Yunnan Key Laboratory of Forest Plant Cultivation and Utilization/Yunnan Laboratory for Conservation of Rare，Endangered and Endemic Forest Plants，Yunnan Academy of Forestry，Kunming 650204，Yunnan，China

Corresponding author: YAN Zheng-liang

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