Department of Entomology, University of California, Riverside, CA.
ISCA Technologies, Inc., Riverside, CA.
J Econ Entomol. 2020 Dec 9;113(6):3028-3031. doi: 10.1093/jee/toaa223.
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.
两种陷阱类型（桶型陷阱和 Picusan 陷阱）捕获和截留掌突切梢小蠹（Rhynchophorus palmarum）的效果比较，掌突切梢小蠹是一种入侵性棕榈害虫，导致加利福尼亚州圣地亚哥县数千株观赏的加那利岛枣椰树（Phoenix canariensis Chabaud [Arecales：Arecaceae]）死亡。分析了数字视频数据，以确定掌突切梢小蠹对每种陷阱类型的行为如何影响捕获率和截留率。摄像 24 小时/天，每周 7 天进行，持续超过 7 个月，共产生 20211 小时的数字数据进行分析。仅在白天观察到象鼻虫对陷阱的吸引力，并且没有发现昼夜活动模式。两种测试的陷阱类型都没有捕获到吸引到陷阱的象鼻虫的 100%。悬挂在地面上方 1.5 米处的桶型陷阱比地面部署的 Picusan 陷阱吸引了 30%的象鼻虫。吸引到桶型陷阱的象鼻虫中，89%进入，82%逃脱，进入陷阱的 18%被截留。未被截留的象鼻虫在进出入口孔和在桶型陷阱周围行走和飞行时，平均花费 19 分 20 秒。相比之下，Picusan 陷阱捕获了进入陷阱的象鼻虫的 89%。象鼻虫从（通过行走或飞行）到达 Picusan 陷阱的侧面到被陷阱截留之间的时间在 90 到 376 秒之间。这些视觉观察表明，Picusan 陷阱比桶型陷阱更有效地捕获掌突切梢小蠹。
