Knowledge on three-dimensional (3D) movement and distribution of Cryptolestes ferrugineus (Stephens) (Coleoptera: Laemophloeidae) in grain bulks assists in the prediction of their distribution inside a bin. The following experiments were conducted to determine the 3D dispersal patterns of adult C. ferrugineus in wheat with 14.5% moisture content: 1) at various insect densities (0.35, 1.77 and 3.53 A/kg (adults/kg) at 20°C and in 24 h movement period; 2) in different movement periods (6, 24, and 72 h) at 20°C and 0.35 A/kg insect density; and 3) at different temperatures (20, 30 and 35°C) at 0.35 A/kg density in 24 h movement period. To create the densities of 0.35, 1.77, and 3.53 A/kg, 100, 500, and 1,000 adults were introduced in about 285 kg wheat, respectively. The 285 kg of wheat was kept in 343 mesh cubes, which in turn were packed in a wooden box. The introduced adults were counted at the end of the movement periods. Adult C. ferrugineus tended to move downward from the point of introduction, and then diffused throughout the grain bulk. The effects of insect densities, movement periods, and temperatures on the dispersion pattern of insects were similar in 1D columns, 2D chambers, and 3D grain bulk.

中文翻译：

---

昆虫密度、运动周期和温度对成虫 Cryptolestes ferrugineus（鞘翅目：Laemophloeidae）三维运动和分布的影响。

有关谷物散装块中 Cryptolestes ferrugineus (Stephens) (Coleoptera: Laemophloeidae) 的三维 (3D) 运动和分布的知识有助于预测它们在仓内的分布。进行以下实验以确定成虫 C. ferrugineus 在水分含量为 14.5% 的小麦中的 3D 扩散模式：1) 在 20°C 和24 h 运动周期；2）在 20°C 和 0.35 A/kg 昆虫密度下的不同运动周期（6、24 和 72 h）；3) 在不同温度（20、30 和 35°C）下，在 0.35 A/kg 密度下，在 24 小时运动期间。为了产生 0.35、1.77 和 3.53 A/kg 的密度，在大约 285 公斤小麦中分别引入了 100、500 和 1,000 个成虫。将 285 公斤小麦保存在 343 目立方体中，而这些又被装在一个木箱里。在运动期结束时对引入的成年人进行计数。成虫 C. ferrugineus 倾向于从引入点向下移动，然后扩散到整个谷物块中。昆虫密度、运动周期和温度对昆虫分散模式的影响在 1D 柱、2D 室和 3D 谷物散装中是相似的。