【摘要】 本文通过频次概率拟合法、扩散系数等分析了银纹夜蛾的空间分布型。结果表明，银纹夜蛾属核心分布类型；抽样方法以5点抽样方便宜行；田间调查抽样以200丛样本较适宜。更多还原

【Abstract】 The paper deal, with distribution pattern of Plusur agnata, using spatial distribntion pattern. expansion patterntarget, The results indicate that distribution pattern of P. agnata is Neyman, five point sampling is the best method ofsanpling, its best number of sanpling is two hundred clump.更多还原