Cost-effective and reliable sampling procedures are crucial for integrated pest management. Sweep net sampling is commonly used for stink bugs (Hemiptera: Pentatomidae) in soybean, with sample size being the number of sets of sweeps, and sample unit size the number of sweeps in each set. Sample unit size has received little attention, but can affect sampling parameters. Here, two sample unit sizes (10 vs. 25 sweeps) were compared for the sampling of stink bug taxa. On average, sampling for stink bugs took 3.6 more minutes with the 25-sweep than with the 10-sweep sample unit size. Generally, estimates of the mean number of stink bugs per sweep were similar between the two sample unit sizes for Euschistus spp. and Chinavia hilaris combined (“combined herbivores”) and Euschistus spp. The 25-sweep sample unit size had a higher probability of detecting combined herbivores, Euschistus spp. and Podisus spp., lower standard errors and relative variance for combined herbivores and Euschistus spp., lower standard errors for C. hilaris, and higher relative net precision [which accounts for sampling cost (i.e., time)] for combined herbivores and Euschistus spp. Taken together, the better probability of detection, precision and efficiency of the 25-sweep sample unit size support the continued use of sampling plans developed for that sample unit size. The optimization of sample unit sizes is an important factor that should be accounted for in the development of sampling plans.

具有成本效益和可靠的取样程序对于综合虫害管理至关重要。扫网抽样常用于大豆中的臭虫（半翅目：蝽科），样本量为扫的组数，样本单位大小为每组的扫数。样本单位大小很少受到关注，但会影响抽样参数。在这里，比较了两个样本单元大小（10 次扫描与 25 次扫描）来对臭虫类群进行抽样。平均而言，25 次扫描的臭虫采样时间比 10 次扫描的样本单元尺寸多 3.6 分钟。一般来说， Euschistus spp的两个样本单位大小对每次扫描的平均臭虫数量的估计是相似的。和Chinavia hilaris结合（“结合草食动物”）和Euschistus spp。25 次扫描的样本单位大小具有更高的检测组合食草动物Euschistus spp 的概率。和Podisus spp.，组合食草动物和Euschistus spp.的标准误差和相对方差较低， C. hilaris的标准误差较低，组合食草动物和Euschistus的相对净精度较高 [考虑了抽样成本（即时间）]spp. 总而言之，25 次扫描样本单位规模的更好的检测概率、精度和效率支持继续使用为该样本单位规模制定的抽样计划。样本单位大小的优化是制定抽样计划时应考虑的一个重要因素。