云南松松小蠹致死木特性分析

Lethal wood characteristic analysis of Yunnan pine shoot beetle

云南松松小蠹是一类严重危害云南松的蛀干害虫,为研究其致死特性,笔者在云南省蠹害发生地区进行调查,运用SPSS19.00以及DPS7.05对数据分析,结果表明:蠹害致死云南松胸径越大蠹害发生越轻微,两者呈现线性负相关,相关系数r=-0.963,P=0.037;林木郁闭度、树高、冠幅与蠹害致死率不相关。无论是云南松纯林,还是混交林,甚至二者间蠹害致死木上、中、下各部分成虫数量、松小蠹幼虫数量、每一母坑道对应幼虫数量均差异性不显著。云南松蠹害纯林、混交林间蠹害致死木上、中、下各部分间纵坑道数量、横坑道数量间差异性均不显著;纯林蠹害致死木纵坑道数量树干上部显著多于中部,中部显著多于下部;混交林蠹害致死木纵坑道数量树干上部显著多于中部及下部。纯林及混交林蠹害致死木横坑道数量树干上部显著小于中部及下部。

Yunnan pine shoot beetle is a kind of trunk borer which is seriously harm of pinus yunnanensis, For the study of the lethal characteristics, The author conduct a survey in happening place of Yunnan pine shoot beetle prey against lethal wood.Useing SPSS19.00 and DPS7.05 for data analysis,the results show that： the Yunnan pine shoot beetle prey against lethal wood＇s DBH was the more biggist,the more slightest for the prey against lethal wood. Both present linear negative correlation, Correlation coefficient r=-0.963, P=0.037; Forest canopy density, tree height, crown breadth and Yunnan pine shoot beetle prey against lethal wood rate are uneorrelated. Whether yunnan pine pure forest, or mixed forest, and even in between Yunnan pine shoot beetle prey against lethal wood,its the upper, middle and under,every part of the adult quantity, loose small prey larva quantity, every mother gallery corresponding to the number of larvae are difference with significance.Yunnan pine prey against pure forest, mixed forest against lethal wood＇s the upper, middle and down,its every part of between longitudinal gallery quantity, cross tunnel between number is all difference with significance;Pure forest prey against lethal wood＇s longitudinal gallery quantity trunk is the Upper significantly more than the central, The central significantly more than the lower; Between the mixed against lethal wood longitudinal gallery quantity trunk is the upper and lower significantly more than central . Pure forest and between the mixed against lethal wood＇s transverse gallery quantity trunk is the upper and lower significantly less than central.