Espino L, Way M O, Wilson L T
University of California Cooperative Extension, Colusa, CA 95932, USA.
J Econ Entomol. 2008 Feb;101(1):216-25. doi: 10.1603/0022-0493(2008)101[216:doophp]2.0.co;2.
Commercial rice, Oryza sativa L., fields in southeastern Texas were sampled during 2003 and 2004, and visual samples were compared with sweep net samples. Fields were sampled at different stages of panicle development, times of day, and by different operators. Significant differences were found between perimeter and within field sweep net samples, indicating that samples taken 9 m from the field margin overestimate within field Oebalus pugnax (F.) (Hemiptera: Pentatomidae) populations. Time of day did not significantly affect the number of O. pugnax caught with the sweep net; however, there was a trend to capture more insects during morning than afternoon. For all sampling methods evaluated during this study, O. pugnax was found to have an aggregated spatial pattern at most densities. When comparing sweep net with visual sampling methods, one sweep of the "long stick" and two sweeps of the "sweep stick" correlated well with the sweep net (r2 = 0.639 and r2 = 0.815, respectively). This relationship was not affected by time of day of sampling, stage of panicle development, type of planting or operator. Relative cost-reliability, which incorporates probability of adoption, indicates the visual methods are more cost-reliable than the sweep net for sampling O.
2003年和2004年期间，对德克萨斯州东南部的商用稻田（水稻，Oryza sativa L.）进行了采样，并将目视样本与扫网样本进行了比较。在稻穗发育的不同阶段、一天中的不同时间以及由不同操作人员对田地进行采样。发现田边和田间扫网样本之间存在显著差异，这表明在距田边9米处采集的样本高估了田间稻绿蝽（Oebalus pugnax (F.)，半翅目：蝽科）的种群数量。一天中的时间对用扫网捕获的稻绿蝽数量没有显著影响；然而，上午捕获的昆虫数量有多于下午的趋势。在本研究评估的所有采样方法中，发现稻绿蝽在大多数密度下具有聚集的空间分布格局。将扫网采样方法与目视采样方法进行比较时，“长杆”扫网一次和“扫杆”扫网两次与扫网采样的相关性良好（r2分别为0.639和0.815）。这种关系不受采样时间、稻穗发育阶段、种植类型或操作人员的影响。纳入采用概率的相对成本可靠性表明，对于稻绿蝽采样，目视方法比扫网更具成本可靠性。
