Numerical data for Fig. 3.

Densities of spruce budworm (numbers per 1 m2 of branch surface area) in Plots 2 and 3 of: (A) postdiapause larvae, pupae, and pupal exuviae: (B) eggs. Year is calendar year and Date, ordinal date.云杉卷叶蛾（Spruce budworm）的种群密度以枝表面积每平方米的个体数为统计单位，相关数据采集自样地2与样地3，调查对象分为两类：(A) 滞育后幼虫、蛹及蛹蜕；(B) 卵。本数据集中，年份为公历纪年，日期为序日数。