【摘要】 茶天牛（Aeolesthes induta Newman）是我国油茶林的重要蛀干害虫,通过调查其幼虫的发生情况,分析该害虫发生的影响因素和空间分布型,为预测预报提供参考。结果表明:60年生油茶林茶天牛幼虫发生程度显著高于10年生油茶林（P<0.01）,前者虫口密度为（0.11±0.01）头·株^-1,是后者的1.94倍。茶天牛幼虫的发生受油茶主干分叉数的显著影响（P₁<0.001,P₂<0.01）,两者之间的关系满足方程y=0.005 x²-0.003 x+0.038（R²=0.955）;但与油茶植株地径、株高或各因素的互作均无显著的相关性。使用聚集度指标进行分析与检验,发现茶天牛幼虫在各样地都为均匀分布。此外,建立了理论抽样模型并提出了理论抽样数,研究结果能够为油茶林中茶天牛的预测预报提供参考。更多还原

【Abstract】 Aeolesthes induta is an important stem borer to economic forests of Camellia oleifera in south China.In order to make a scientific prediction of A.induta,a sampling survey was taken to find out the larva occurrence characteristics and spatial distribution pattern.The results showed that:the occurrence rate of A.induta larvae in 60-year forest of Camellia oleifera was significantly higher than that in 10-year′s forest（P<0.01）,with an average density of 0.11±0.01 per plant,1.94 times of the latter.There was a positive correlation between branch numbers and the occurrence rate in both forests（P₁<0.001,P₂<0.01）,satisfying the relational equation:y=0.005 x²-0.003 x+0.038（R²=0.955）.However,the occurrence rate was not affected by the ground diameter,plant height or interaction of factors.Aggregation indices showed out that the distribution of A.induta larvae was uniform in each sample area.The theoretical sampling model was calculated and could be used for field sampling investigation.更多还原