本文以油松毛虫为材料,在室内自然变温条件下,采用回归直线法,最小变异系数法和直接最优法测得各虫态,各龄期的发育起点温度和有效积温。通过计算和资料核对,油松毛虫理论代数与实际代数基本吻合,均为一代。其中以直接最优法为最简便又精确,可为广泛应用。 In this paper, the oil pine caterpillars as material, under the conditions of natural indoor temperature, using regression line method, the minimum coefficient of variation method and the direct optimal method to measure the developmental temperature and effective accumulated temperature of each instar and each instar. Through calculation and data checking, the theoretical algebra of the oil pine caterpillar basically coincide with the actual algebra, are generation. Among them, the direct optimal method is the most simple and accurate, which can be widely used.