本项目对与马尾松毛虫防治指标有关的因子,进行了研究,提出了以卵块密度作为警戒指标、幼虫密度作为防治指标的新概念,建立了防治指标的计算公式。实践证明,按照卵块密度作为危害警戒指标,既可避免盲目的防治、节省经费开支,又能有效地控制虫灾、收到较好的经济与社会效益。 This project studied the factors related to the prevention and control index of Dendrolimus punctatus, and proposed the new concept of egg density as the warning indicator and the larval density as the prevention and control index, and established the calculation formula of the prevention and control index. Practice has proved that according to egg mass density as a warning indicator of danger, we can avoid blind prevention and control, save money and expenditures, but also effectively control pests and diseases and receive better economic and social benefits.