Counts of gypsy moths in pheromone traps in the Central Appalachian Mountains

These are counts of gypsy moths, Lymantria dispar, in pheromone traps and counts of egg masses. They were collected as part of a gypsy moth management program in portions of the central Appalachian Mtns. in Virginia and West Virginia. In VA, traps were placed on a quasi 2 km grid and in WV the traps were in a qualsi 3 kim grid. In certain locations (where isolated colonies were thought to exist based upon previous years trapping data) traps were put at much higher densities. These data exhibit a very strong trend - counts are very high to the northeast and low (mostly zero) in the southwest. This is because the trapping grid was located on the advancing front of the expanding range of this species. Data are formated as easting, northing, males/trap. Coordinates are in UTM values.本数据集涵盖舞毒蛾（Lymantria dispar）信息素诱捕器的雄蛾捕获量与卵块数量统计数据。该数据采集自美国弗吉尼亚州与西弗吉尼亚州境内阿巴拉契亚山脉中部部分区域的舞毒蛾防治项目。其中，弗吉尼亚州的诱捕器按准2千米网格布设，西弗吉尼亚州则采用准3千米网格；在依据往年诱捕数据推测存在孤立种群的特定区域，诱捕器布设密度大幅提升。本数据集呈现极强的空间分布规律：东北部区域诱捕量极高，西南部则普遍极低（几乎均为0）。这是因为本次诱捕网格恰好覆盖了该物种分布范围扩张的前沿推进带。数据格式为东向坐标、北向坐标、单诱捕器雄蛾捕获量，坐标采用通用横轴墨卡托（UTM, Universal Transverse Mercator）坐标系。