Abstract Movement and distribution of Sitophilus zeamais adults and relationship between their trapping frequency and insect density were determined in one tonne wheat with 11.5 ± 0.2, 12.5 ± 0.1 and 13.5 ± 0.2% moisture contents (wet basis) inside cylindrical bins at 20, 25 and 30 °C. The introduced adult densities were 0.5, 1.0, and 2.0 adults/kg wheat (A/kg). Inside each bin, 15 probe traps were vertically installed in three layers. In each layer, five traps were installed at the center and half radii of the bin individually. The trapped adults were counted daily up to 7 d, and then 15 kg wheat was sampled at each trap location. The insect number in each sample was counted. The recovered adults in the top layer were less than that in the middle layer, while no significant difference between at middle and bottom layers. In each layer, adults preferred the center location at 0.5 A/kg, while this trend was unidentified at other densities. There was an autocorrelation of insect densities at adjacent locations at ≥ 1.0 A/kg, while no autocorrelation in the vertical direction. The adults had an aggregation distribution at any temperature, moisture content and adult density. The normal and Poisson model could not be used to describe the distribution of the count frequency of the adults in the samples, while the negative binomial model could describe this distribution in 18 out of 27 sampling sets at ≤ 1.0 A/kg. The trapping frequency was strongly influenced by the trapping period and increased with the increase of insect densities. The relationship between adult densities and trapping frequencies at the sampling locations had a significant difference at different grain temperatures, while no difference at different moisture contents, grain depths, and locations.

中文翻译：

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不同籽粒温度和水分含量下玉米粒成虫在小麦散装中的运动分布及其密度与诱集频率的关系

摘要 在 20、25 和 25 ℃、11.5 ± 0.2、12.5 ± 0.1 和 13.5 ± 0.2% 水分含量（湿基）的一吨小麦中，确定了玉米粒蝇成虫的运动和分布及其诱捕频率与昆虫密度之间的关系。 30℃。引入的成虫密度为 0.5、1.0 和 2.0 成虫/公斤小麦 (A/kg)。在每个垃圾箱内，垂直安装了 15 个探针陷阱，分为三层。在每一层中，五个捕集器分别安装在垃圾箱的中心和半径的一半处。每天对被困成虫进行计数，直至 7 d，然后在每个陷阱位置取样 15 kg 小麦。计算每个样品中的昆虫数量。上层采收成虫数量少于中层，而中下层间无显着差异。在每一层，成年人更喜欢 0.5 A/kg 的中心位置，而这种趋势在其他密度下是未知的。在≥ 1.0 A/kg 时，相邻位置的昆虫密度存在自相关，而在垂直方向上没有自相关。成虫在任何温度、水分含量和成虫密度下都有聚集分布。正态和泊松模型无法描述样本中成虫计数频率的分布，而负二项式模型可以描述 27 个样本中 18 个样本的这种分布，≤ 1.0 A/kg。诱集频率受诱集周期的影响很大，并随着昆虫密度的增加而增加。采样点成虫密度与诱集频率的关系在不同谷物温度下存在显着差异，