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进口散装粮船是一个特殊生境，害虫具有特殊的分布规律。研究表明，害虫在船舱平面上成集团性分布，并且在周围的聚集强度较高，中部较低。在船舱纵深方向，害虫的聚集强度随粮食深度的增加提高，在中下层的聚集强度最大。在害虫分布规律基础上，对进口粮的检疫取样方法、取样量、取样点数以及总体取样次数等一系列关键扦样因素进行了分析研究。确定了科学的检疫扦样方法，提高了检疫扦样的准确度和扦样效率。
Import bulk grain ship is a special habitat, pests have a special distribution. Studies have shown that the pests in the cabin plane into a group distribution, and around the higher intensity of aggregation, lower central. In the depth direction of the cabin, the aggregation intensity of pests increased with the increase of grain depth, and the aggregation intensity was highest in the middle and lower layers. Based on the distribution rules of pests, a series of key sampling factors such as quarantine sampling method, sampling volume, sampling points and sampling times of imported grain were analyzed. The scientific method of quarantine sampling was established, which improved the accuracy and sampling efficiency of quarantine sampling.