Holotrichia oblita (Faldermann) (Coleoptera: Scarabaeidae) is a major soil insect pest that damages forest trees, crops, and lawns. Adults of H. oblita fly, forage, and mate at night but remain underground during the day. We studied the effect of photoperiod on H. oblita reproduction. H. oblita females laid more eggs at 8:16 (L:D) h and 0:24 (L:D) h than other photoperiods. As the scotophase increased, the preoviposition period decreased and the oviposition period increased. Female longevity exceeded that of males at all photoperiods, and both males and females at 0:24 (L:D) h had the shortest longevity. The number of eggs laid per female increased with increasing food consumption. Females at 8:16 (L:D) h had the greatest food consumption and laid the most eggs, while females at 24:0 (L:D) h had the lowest food consumption and laid few eggs. The food intake of adults increased gradually and decreased slowly after reaching a peak. Females began to lay eggs when their food consumption reached a maximum. These results indicate that a scotophase is necessary for the reproduction of H. oblita. A long scotophase promotes greater oviposition. The effect of photoperiod on reproduction is affected by food intake.

中文翻译：

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光周期对 Holotrichia oblita（鞘翅目：Scarabaeidae）寿命、食物消耗和繁殖的影响

Holotrichia oblita (Faldermann) (鞘翅目：Scarabaeidae) 是一种主要的土壤害虫，会破坏森林树木、农作物和草坪。H. oblita 的成虫在夜间飞行、觅食和交配，但白天留在地下。我们研究了光周期对 H. oblita 繁殖的影响。H. oblita 雌性在 8:16 (L:D) h 和 0:24 (L:D) h 比其他光周期产卵更多。随着暗期的增加，产卵前期减少，产卵期增加。女性的寿命在所有光周期都超过了男性，0:24（L:D）小时的男性和女性的寿命最短。随着食物消耗量的增加，每只雌性产卵的数量增加。8:16 (L:D) h 的雌性食物消耗量最大，产卵最多，而 24:0 (L:D) h 的雌性食物消耗量最低，产卵量很少。成年人的摄食量逐渐增加，达到高峰后缓慢下降。当它们的食物消耗达到最大值时，雌性开始产卵。这些结果表明暗相对于 H. oblita 的繁殖是必需的。长的暗相促进更多的产卵。光周期对繁殖的影响受食物摄入的影响。