Camparing corrugated paper trapping with sample sieving,Cryptolestes ferrugineus and Tribolium castaneum are monitored earlier and more than that by the former method,but Rhizopertha dominica was checked about 4 weeks later than by the latter.

• 瓦楞纸板诱捕锈赤扁谷盗和赤拟谷盗较取样筛检法所得时间早、数量多,但在检测到谷蠹的时间上要比取样筛检晚4周的时间。