【摘要】 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。更多还原

【Abstract】 Chinese-pine caterpillar (Dendrolimus tabulaeformis Tsai et Liu) was used four testing the developmental threshold and effective accumulated temperature of its different life stages and instars by means of linear regression method, the method of coefficient of minimum variation and the direct optimum method under varying temperature of laboratory conditions. Through computation and data checking, the authors found out that the theoretical number of generation is fundamently in coincidence with that actual number of generation. It was found there was only one generation per year. Among these three methods, the direct optimum method seems to be the most concise and accurate one.更多还原