估价因南方松甲虫(SPB)危害造成的松树大量死亡,这在防治这种害虫以及挽救被害的林木方面都具有重要意义。要获得充分的、用于统计估计的可靠资料,费用极其昂贵。最初由航空略图获得的资料虽不昂贵但不甚可靠。本文介绍一种获得可靠信息的有用的统计设计,并叙述该设计的野外试验。 It is estimated that a large number of pine trees will be killed due to the damage caused by southern pine beetle (SPB), which is of great significance in the prevention and control of such pests and the rescue of the damaged trees. To obtain sufficient reliable information for statistical estimation is extremely expensive. The information initially obtained from aerial sketches is inexpensive but less reliable. This article presents a useful statistical design for obtaining reliable information and describes the field trials of the design.