猫眼尺蠖在三种女贞属植物上的实验种群两性生命表

【目的】猫眼尺蠖Problepsis superans是一种鳞翅目尺蛾科食叶害虫, 有报道称它只危害园林植物小叶女贞Ligustrum quihoui Carr., 关于其他寄主及其寄主对其生命特征的影响很少研究。开展本研究有助于了解小叶女贞及其可能寄主金叶女贞Ligustrum×vicaryi Hort.和女贞Ligustrum lucidum Ait.对猫眼尺蠖生长发育和繁殖的影响。【方法】在室内25±1℃, 相对湿度为75%±5%, 光周期为16L∶8D条件下, 组建了猫眼尺蠖在这3种植物上的实验种群年龄-龄期两性生命表。【结果】金叶女贞、小叶女贞和女贞对猫眼尺蠖幼虫历期、产卵量有明显影响, 对卵期、蛹期、产卵前期（指雌虫羽化至开始产卵）、雄虫存活时间等无显著影响。猫眼尺蠖取食金叶女贞幼虫历期（21.33 d）显著短于取食小叶女贞（23.46 d）和女贞(27.28 d), 产卵量（529.1粒/雌）显著高于在小叶女贞（442.5粒/雌）和女贞（339.7粒/雌）上。猫眼尺蠖在金叶女贞和小叶女贞上的内禀增长率(r)、周限增长率(λ)、净增殖率(R₀)无显著差异, 但两者都显著大于在女贞上。猫眼尺蠖在3种植物上的平均世代周期(T)差异显著, 它们从小到大为: 金叶女贞、小叶女贞、女贞, 在3种植物上总繁殖率(GRR)没有显著差异。【结论】金叶女贞和小叶女贞相比女贞提供了猫眼尺蠖较好质量的食物, 金叶女贞和女贞具备作为猫眼尺蠖的寄主或临时寄主的可能。

Age-stage two-sex life tables of the experimental population of Problepsis superans (Lepidoptera: Geometridae) on three Ligustrum species

【Aim】 Problepsis superans is a pest, which feeds the leaves of the garden plant Ligustrum quihoui Carr. No research has been done on other host plants and their effects on life history of P. superans. The study can help understand the influence of L. quihoui and two potential host plants, Ligustrum × vicaryi Hort. and Ligustrum lucidum Ait., on the development and reproduction of P. superans. 【Methods】 Age-stage two-sex life tables of the experimental population of P. superans on three ligustrum species, i.e., L. × vicary, L. quihoui, and L. lucidum were constructed under the conditions of 25±1℃, 75%±5% R. H. and 16L∶8D photoperiod. 【Results】 The results showed that there were significant differences in larval longevity and fecundity of P. superans on the three ligustrum species, however, no significant differences were found in egg and pupal duration, adult preoviposition period (APOP), and male survival time. The total larval duration of P. superans on L. × vicaryi (21.33 d) was significantly shorter than that on L. quihoui (23.46 d) and L. lucidum (27.28 d)； however, the fecundity on L. × vicaryi (529.1 eggs/female) was significantly higher than that on L. quihoui (442.5 eggs/female) and L. lucidum (339.7 eggs/female). The intrinsic rate of increase (r), the finite rate of increase (λ) and the net reproductive rate (R₀) of P. superans on L. × vicaryi and L. quihoui were significantly higher than that on L. lucidum; however, there was no significant difference between on L. × vicaryi and on L. quihou. The mean generation time (T) of P. superans on the three species differed significantly and ranked as L. × vicaryi < L. quihoui < L. lucidum. However, there were no significant differences in the gross reproduction rates (GRR) of P. superans on the three species. 【Conclusion】 L. vicaryi and L. quihoui provide better quality food for P. superans than L. lucidum, and L. vicaryi and L. lucidum may serve as hosts or temporary hosts of P. superans.