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落叶松鞘蛾(Coleophora dahuricaFlkv.)是我省落叶松林的重要害虫。为搞好该虫的预测预报和防治工作,正确估计种群数量,合理确定抽样方法和样本数,必须首先确定其在林间的分布型。为此,我们于1985年对落叶松鞘蛾卵期林间分布型作了初步调查,现将结果报导如下。一、研究方法 (一)绘林间分布实况图在落叶松鞘蛾卵期设标准地(不少于100株),调查落叶松下层树冠的着卵数,在东西南北四个方向上各选一标准枝,每枝再选20个叶丛,逐丛检查落叶松鞘蛾的着卵数,并依原来位置记载在方格纸上,绘出林间分布实
Coleophora dahuricaFlkv. Is an important pest of Larix gmelinii forest in our province. In order to do a good job in predicting and controlling the pest, to correctly estimate the number of the population and to determine the sampling method and the number of samples reasonably, we must first determine its distribution pattern in the forest. For this reason, we conducted a preliminary survey on the distribution patterns of larvae of Coleoptera eggs in 1985, and the results are reported as follows. First, the research methods (A) painted live distribution map Lin in the larvae of Coleoptera eggs set standard (not less than 100) to investigate the number of eggs in the lower layer of larch tree, in the east, south, north and south of the four options A standard branch, each branch re-election 20 leaves, check by the plexus larva coleoptile eggs, and according to the original location on the graph paper, draw the forest distribution of real