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松突圆蚧虫口数量与危害程度的关系
引用本文:钟景辉.松突圆蚧虫口数量与危害程度的关系[J].华东昆虫学报,2005,14(2):155-158.
作者姓名:钟景辉
作者单位:福建省泉州市森林病虫防治检疫站,福建,泉州,362000
基金项目:泉州市科技局重点项目(Z200209).
摘    要:通过大面积的野外调查研究。结果表明:松突圆蚧每针束平均虫口数量(a)、针束最高虫口数量(b)、有虫针束率(c)和危害程度(d)4个指标之间均呈显著或极显著正相关。在野外虫口数量调查中可用针束最高虫口数量替代每针束平均虫口数量指标,以有虫针束率指标作为每针束平均虫口数量和针束最高虫口数量的有效参考指标。在危害程度的调查中,可用有虫针束率作为替代指标,以针束最高虫口数量和每针束平均虫口数量分别作为第1和第2参考指标。3个虫口数量指标中以有虫针束率对危害程度的直接作用最大,其次是针束最高虫口数量,每针束平均虫口数量最低。在间接作用中,针束最高虫口数量通过有虫针束率对危害程度的影响最大,每针束平均虫口数量通过有虫针束率的间接影响较大。

关 键 词:松突圆蚧  虫口数量  危害程度
文章编号:1005-1694(2005)02-0155-04
收稿时间:03 8 2005 12:00AM
修稿时间:2005年3月8日

Relationship between the amount of Hemiberlesia pitysophila and damage degree to plants
ZHONG Jing-hui.Relationship between the amount of Hemiberlesia pitysophila and damage degree to plants[J].Entomological Journal of East China,2005,14(2):155-158.
Authors:ZHONG Jing-hui
Abstract:By means of field investigation on pine forest damaged by Hemiberlesia pitysophila Takagi, the (research) results of correlation analysis and path analysis showed that there existed notable positive correlation (among) the average amount of H.pitysophila per pine needle (index a), the highest amount per pine needle ((index b),) the ratio of damaged needle (index c) and the damage degree (index d). Index a could be substituted by index b, and index c could be used as efficient reference of a and b in the field investigation. Index d could be substituted by c, b and a could be used as the first and the second efficient reference of d in field investigation, respectively. The index d was directly affected by c, and then was b and a. The damage degree indirectly was affected by index b through index c, and then was index a through index c.
Keywords:Hemiberlesia pitysophila  individual amount  damage degree
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