The efficacies of two trap types, bucket and Picusan traps, for capturing and retaining Rhynchophorus palmarum (L.), an invasive palm pest responsible for killing thousands of ornamental Canary Islands date palms (Phoenix canariensis Chabaud [Arecales: Arecaceae]) in San Diego County, CA, were compared. Digital video data were analyzed to determine how R. palmarum behavior toward each trap type affected capture and retention rates. Videography was conducted 24 h/d, 7 d/wk, for more than 7 mo resulting in 20,211 h of digital data for analysis. Weevil attraction to traps was observed only during daylight hours and no patterns in diel activity were found. Neither trap type tested captured 100% of weevils attracted to traps. Bucket traps suspended 1.5 m above the ground attracted 30% more weevils than ground deployed Picusan traps. Of those weevils attracted to bucket traps, 89% entered, 82% escaped, and 18% that entered traps were retained. Weevils that were not retained spent an average of 19 min 20 s entering and exiting entry holes and walking and flying around the bucket trap. By contrast, Picusan traps captured 89% of weevils that entered the trap. The time between weevils arriving (via walking or flight) on the sides of the Picusan trap and retention in the trap ranged between 90 and 376 s. These visual observations suggest that Picusan traps are more efficient than bucket traps for R. palmarum capture.

中文翻译：

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使用数码摄像机来确定两种陷阱类型捕获 Rhynchophorus palmarum（鞘翅目： Curculionidae）的功效

两种陷阱类型（桶式和 Picusan 陷阱）用于捕获和保留 Rhynchophorus palmarum (L.) 的功效加利福尼亚州县进行了比较。分析数字视频数据以确定 R. palmarum 对每种陷阱类型的行为如何影响捕获率和保留率。录像进行了 24 小时/天、7 天/周，超过 7 个月，产生了 20,211 小时的数字数据用于分析。象鼻虫对陷阱的吸引力只在白天观察到，没有发现昼夜活动的模式。测试的陷阱类型都没有捕获 100% 被陷阱吸引的象鼻虫。悬挂在离地面 1.5 m 处的桶形陷阱比地面部署的 Picusan 陷阱吸引的象鼻虫多 30%。在被桶形陷阱吸引的象鼻虫中，89% 进入，82% 逃脱，18% 进入陷阱后被保留。未被保留的象鼻虫平均花费 19 分 20 秒进出入口孔，并在桶形陷阱周围行走和飞行。相比之下，Picusan 陷阱捕获了 89% 进入陷阱的象鼻虫。象鼻虫到达（通过步行或飞行）到达 Picusan 陷阱两侧和在陷阱中停留的时间在 90 到 376 秒之间。这些目视观察表明，Picusan 捕集器比桶​​捕集器更有效地捕获 R. palmarum。Picusan 陷阱捕获了 89% 进入陷阱的象鼻虫。象鼻虫到达（通过步行或飞行）到达 Picusan 陷阱两侧和在陷阱中停留的时间在 90 到 376 秒之间。这些目视观察表明，Picusan 捕集器比桶​​捕集器更有效地捕获 R. palmarum。Picusan 陷阱捕获了 89% 进入陷阱的象鼻虫。象鼻虫到达（通过步行或飞行）到达 Picusan 陷阱两侧和在陷阱中停留的时间在 90 到 376 秒之间。这些目视观察表明，Picusan 捕集器比桶​​捕集器更有效地捕获 R. palmarum。