Armstrong J S, Spurgeon D W, Suh C P C
Areawide Pest Management Research Unit, USDA-ARS, Weslaco, TX 78596, USA.
J Econ Entomol. 2006 Apr;99(2):323-30. doi: 10.1603/0022-0493-99.2.323.
The Southeastern Boll Weevil Eradication Program has proposed reducing maintenance program costs in eradicated zones by using an extended-life "superlure" in traps to detect populations of the boll weevil, Anthonomus grandis grandis Boheman. However, superlure effectiveness has not been extensively evaluated. We compared the superlure (30 mg of eugenol plus 25 mg of grandlure) to a standard lure (10 mg of grandlure) based on captures of weevils and changes in lure pheromone content. Lure treatments (standard and superlure, replaced biweekly or not replaced) were compared in 4-mo-long trapping periods. Captures of weevils did not generally reflect differences among lure treatments indicated by assays of lure contents. During the first 2 wk of exposure, amounts of pheromone released by the superlure were generally comparable with those of the standard lure, but pheromone composition was more stable. During the second 2 wk of exposure, the superlure usually released more pheromone than similarly aged standard lures, but less than half as much as the standard lure replaced biweekly. Based on numbers of captured weevils during the last 2 wk of an extended trapping period, the superlure performed similarly to the standard lure replaced biweekly. However, corresponding pheromone releases by the superlure were less than those by the standard lure replaced biweekly. This inconsistency suggests that numbers of captured weevils alone may be inadequate for evaluation of pheromone formulations. Our results suggest that better understanding of the consequences of reduced pheromone release during an extended trapping period is needed before adoption of the superlure can be recommended.
东南部棉铃象甲根除计划提议，通过在诱捕器中使用延长使用寿命的“超级诱芯”来检测棉铃象甲（Anthonomus grandis grandis Boheman）种群，从而降低根除区域的维护计划成本。然而，超级诱芯的有效性尚未得到广泛评估。我们基于象甲捕获量和诱芯信息素含量的变化，将超级诱芯（30毫克丁香酚加25毫克大诱芯）与标准诱芯（10毫克大诱芯）进行了比较。在为期4个月的诱捕期内，对比了诱芯处理方式（标准诱芯和超级诱芯，每两周更换或不更换）。象甲的捕获量通常并未反映出诱芯含量测定所表明的诱芯处理方式之间的差异。在暴露的前两周，超级诱芯释放的信息素量通常与标准诱芯相当，但信息素组成更稳定。在暴露的后两周，超级诱芯通常比同样老化的标准诱芯释放更多信息素，但不到每两周更换一次的标准诱芯释放量的一半。基于延长诱捕期最后两周捕获的象甲数量，超级诱芯的表现与每两周更换一次的标准诱芯相似。然而，超级诱芯相应的信息素释放量低于每两周更换一次的标准诱芯。这种不一致表明，仅依据捕获的象甲数量可能不足以评估信息素配方。我们的结果表明，在推荐采用超级诱芯之前，需要更好地了解延长诱捕期内信息素释放减少的后果。
