The lesser grain borer, Rhyzopertha dominica, and the rust red flour beetle, Tribolium castaneum, are two major beetle pests commonly found infesting stored products worldwide. Both species can cause severe economic damage and their management is complicated by their potential to develop resistance to several of the limited chemical options available. However, pest management strategies can be improved by understanding the ecology of the pest insect. To determine the spatiotemporal activity of R. dominica and T. castaneum, we conducted a trapping study over two years in a temperate region of south-eastern Australia, with traps located near grain storages and fields. We captured higher numbers of R. dominica than T. castaneum, and both species were more prevalent in traps located close to grain storages. Similar and consistent seasonal patterns were displayed by both species with activity ceasing during the winter (June–August) months. We found linear correlations between maximum daily temperatures and trap catches, and minimum threshold temperatures for flight activity were 14.5 °C and 15.6 °C for R. dominica and T. castaneum, respectively. The results are discussed in relation to the ecology of these pests along with their implications for pest management.

中文翻译：

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两种储粮害虫Rhyzopertha dominica（Bostrichidae）和Tribolium castaneum（Tenebrionidae）的空间分布和飞行方式：对害虫管理的影响

较小的grain虫（Rhyzopertha dominica）和锈红色的面粉甲虫Tribolium castaneum是世界各地常见的两种主要甲虫，经常侵害存储产品。两种物种都可能造成严重的经济损失，并且由于它们对某些可用的有限化学选择产生抗药性的潜力，因此其管理变得复杂。但是，可以通过了解害虫的生态来改善害虫管理策略。为了确定R. dominica和T. castaneum的时空活动，我们在澳大利亚东南部的一个温带地区进行了为期两年的诱集研究，诱集装置位于谷物仓库和农田附近。我们捕获了更多数量的多米尼加罗非鱼比T. castaneum，并且这两个物种在靠近谷物仓库的陷阱中更普遍。两种物种在冬季（6月至8月）的活动均表现出相似且一致的季节性模式。我们发现最大每日温度和陷阱捕获，和最小阈值的温度下飞行活动之间的线性相关性为14.5℃，15.6℃，R.蠹和赤拟谷盗分别。讨论了有关这些害虫的生态学及其对害虫管理的影响的结果。