【摘要】 松针鞘瘿蚊(Thecodiplosis japonensis)是我国新发现的一种入侵性害虫。本研究采用7个聚集度指标对松针鞘瘿蚊幼虫的空间分布型进行测定。结果表明,松针鞘瘿蚊幼虫在林间均呈聚集分布,聚集强度随种群密度的升高而增加;聚集是由松针鞘瘿蚊自身行为或环境因素引起的;利用空间格局参数确定黑松林中松针鞘瘿蚊幼虫发生危害调查的理论抽样数模型为N=(t/D)2(-1.321/m+0.063)。更多还原

【Abstract】 Thecodiplosis japonensis is a new invasive pest insect in China.The spatial distribution pattern of T.japonensis larvae was determined by seven spatial distribution pattern indices.The results indicated that this species showed aggregative distributions and the aggregation intensity increased with the increasing of population density.The aggregation was caused by environmental factors or behaviors of T.japonensis.According to the spatial pattern parameters,the model of theoretical sampling number for the occurrence and damage investigation of T.japonensis larvae in black pine forest was N =( t/D)~2(-1.321/m +0.063).更多还原