Understanding insect movement and distribution is critical for developing an effective insect pest management protocol. Movement and distribution of adult Cryptolestes ferrugineus (Stephens) in response to nominal temperature differences of 5, 10, 15, and 20°C in 1- and 2-m horizontal columns filled with 12.5% moisture content wheat were studied in 24, 48, and 72 h of movement times. In the wheat columns without temperature differences, adults had a diffusion distribution pattern caused by their random movement. Adults showed bias movement to the warmer grain in wheat columns with temperature differences and preferred the warmer grain regardless of the magnitude of temperature differences in less than 24 h. Their distribution did not have significant differences among different movement times in 1- or 2-m columns. About 40% of adults moved to the warmer wheat located at 0.4 to 0.5 m in the 1 m column but did not move to the warmer wheat located at 0.9 to 1 m in the 2-m column. Therefore, length of grain column influenced detection of warmer grain by insects. Adults under different temperatures had a similar response as that under linear temperature gradients.

中文翻译：

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Cryptolestes ferrugineus (Coleoptera: Laemophloeidae) 成虫在不同温差下水平谷柱不同长度的运动和分布

了解昆虫的运动和分布对于制定有效的害虫管理方案至关重要。在 24, 48,和 72 小时的运动时间。在没有温差的麦柱中，成虫由于其随机运动而呈现出一种扩散分布模式。在具有温差的麦柱中，成虫偏向于温暖的谷物，并且无论在不到 24 小时内的温差大小如何，成虫都偏爱温暖的谷物。它们的分布在 1 米或 2 米柱中的不同移动时间之间没有显着差异。大约 40% 的成虫转移到 1 m 柱中 0.4 到 0.5 m 的温暖小麦，但没有转移到 2 米柱中 0.9 到 1 m 的温暖小麦。因此，谷物柱的长度影响昆虫对温暖谷物的检测。不同温度下的成年人与线性温度梯度下的反应相似。