| 刘有莲, 庞正轰, 苏付保, 李荣珍.相思拟木蠹蛾为害西南桦的调查研究[J].植物保护,2012,38(4):156-158. |
| 相思拟木蠹蛾为害西南桦的调查研究 |
| Investigation on Lepidarbela baibarana on Betula alnoides |
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| DOI： |
| 中文关键词: 西南桦 相思拟木蠹蛾 调查研究 |
| 英文关键词:Betula alnoides Lepidarbela baibarana investigation |
| 基金项目: |
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| 中文摘要: |
| 于广西百色市老山林场调查了相思木蠹蛾对西南桦的为害情况，并进行了不同高度虫孔数组内单因素方差分析、不同整枝方式虫孔平均数差异显著性检验、种群密度估计模型拟合研究。结果表明:西南桦有虫孔株率70%，虫孔密度2.79个/株；以2 m为区间段，无虫孔的占74.8%，有1个以上虫孔的占25.2%；相思拟木蠹蛾对树干高度有选择性，树干4～6 m间虫孔数最多；幼虫侵入期人工修枝会加重相思拟木蠹蛾为害；以无虫株率估计相思拟木蠹蛾种群密度的模型为x^=1.420 8(-lnP0)1.476 8。相思拟木蠹蛾为害对西南桦木材品质有较大影响，应加强监测防治技术研究。 |
| 英文摘要: |
| The forest of Betula alnoides in Laoshan Forest Farm in Baise City of Guangxi was investigated to study the occurrence and damage of the Lepidarbela baibarana, a boring beetle of B.alnoides. The wormhole numbers at different heights were analyzed using oneway ANOVA. The results showed that the ratio of B.alnoides trees with wormholes was 70% , with a wormhole density of 2.79 wormholes per plant. L.baibarana was selective for the height of tree trunks. The wormhole number was maximum when the height above ground was 4-6 m. Artificial pruning might deteriorate the invasion of larvae. The population density-estimated model was x^=1.420 8(-lnP0)1.476 8．In summary, the damage of L.baibarana is a serious problem to B. alnoides, the quality of which can be greatly affected. Research on prevention and control technology should be strengthened． |
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