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Abstract：
To explore the feasibility of adjusting the photoperiod to regulate the life parameters and predation ability of Harmonia axyridis Pallas in greenhouses during the winter, life tables were constructed for H. axyridis under the three following photoperiods: 9L:15D (light/dark), 12L:12D, and 16L:8D at 15 °C, an average greenhouse temperature during the winter when aphids severely damage vegetables. The effects of photoperiods on predation by this ladybird were tested in both laboratory and greenhouse settings. The results showed that increased illumination promoted the development and reproduction of H. axyridis; under medium and long photoperiods, the pre-adult periods were 3.61 days and 4.34 days shorter than that under the short photoperiod, respectively, and the fecundity increased by 1.78 and 2.41 times. Population parameters r, λ, and R0 increased as illumination time increased, whereas T decreased. Increased illumination also increased the predation by third- and fourth-instar larvae and adults. The amounts of predation by fourth-instar larvae and adults increased by 22.16% and 75.09% under the medium photoperiod, and those under the long photoperiod increased by 71.96% and 89.64%, respectively. The numbers of Myzus persicae Sulzer predated by H. axyridis under the long photoperiod were higher than those under the short photoperiod in a greenhouse, and the predation parameters were influenced.
摘要：
为探讨调节光周期调节温室中哈蒙虫的寿命参数和捕食能力的可行性，在以下三种光周期下构建了H.axyridis的生命表：9L：15D（亮/暗），12L:12D,16L：15°C时为8D，冬季蚜虫严重损害蔬菜时的平均温室温度。在实验室和温室环境中测试了光周期对这种瓢虫捕食的影响。结果表明,光照增加促进了水稻的发育和繁殖;在中、长光周期下,成前时期比短光周期短3.61天和4.34天，分别,繁殖力分别增加了1.78和2.41倍。人口参数r，λ,R0随着光照时间的增加而增加，而T下降。光照的增加也增加了三龄和四龄幼虫和成虫的捕食。在中等光周期下，四龄幼虫和成虫的捕食量分别增加了22.16％和75.09％，长光周期下的光周期分别增加了71.96%和89.64%，分别。在长光周期下，由H.axyridis早熟的MyzusSulzer的数量高于温室中短光周期下的数量，捕食参数受到影响。
