Abstract Rhyzopertha dominica male adults produce an aggregation pheromone that attracts both sexes. While many studies have tested the behavioral response of R. dominica adults to its aggregation pheromone, information on the distance of attraction and effective pheromone concentration are lacking. Therefore, the objectives of this study were to determine the recapture rate of R. dominica adults released at different distances from a pheromone-baited and pheromone + kairomone-baited trap, as well as the most effective pheromone concentration for R. dominica. Experiments were arranged as complete randomized design with four replicates. A commercial pitfall trap containing R. dominica pheromone alone or pheromone + kairomone was placed inside an experimental arena. Adult R. dominica were released at different distances from the trap and the adults captured were counted. A separate experiment was conducted using pitfall traps containing different concentrations of the aggregation pheromone placed inside the experimental arena. Adult R. dominica were released 60 cm away from the pitfall trap and the recaptured adults were recorded. The trapping efficiency was higher when the trap contained both the pheromone and kairomone than the pheromone alone. Trap capture was highest when the beetles were released at distances up to 70 cm and at a concentration of 100 μL/1 m2. Our findings suggest that food facility managers should take into account the effective pheromone concentration and distance of attraction, while also strongly consider including food kairomones in traps when developing monitoring programs for R. dominica.

中文翻译：

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聚集信息素浓度和距离对多米尼克 (F.) (鞘翅目: Bostrychidae) 成虫诱捕的影响

摘要 Rhyzopertha dominica 雄性成虫产生一种聚集信息素，吸引两性。虽然许多研究已经测试了 R. dominica 成虫对其聚集信息素的行为反应，但缺乏有关吸引距离和有效信息素浓度的信息。因此，本研究的目的是确定从信息素诱饵和信息素 + kairomone 诱饵诱捕器的不同距离处释放的多米尼克红毛虫的再捕获率，以及对多米尼克红毛虫最有效的信息素浓度。实验被安排为具有四个重复的完全随机设计。一个商业陷阱陷阱只包含 R. dominica 信息素或信息素 + kairomone 被放置在一个实验舞台内。成人 R。多米尼克在距诱捕器不同距离处被释放，并计算捕获的成虫。使用放置在实验场地内的含有不同浓度的聚集信息素的陷阱陷阱进行了单独的实验。成年 R. dominica 被释放到距陷阱陷阱 60 厘米处，并记录重新捕获的成虫。当诱捕器同时包含信息素和开罗素时，诱捕效率高于单独包含信息素时的诱捕效率。当甲虫以 70 厘米的距离和 100 微升/1 平方米的浓度释放时，陷阱捕获率最高。我们的研究结果表明，食品设施管理人员应考虑有效的信息素浓度和吸引距离，同时在制定多米尼克红毛虫的监测计划时，还应强烈考虑在陷阱中包含食品 kairomones。