3/30/22: The palm weevil cone trap is now approved for use, but it is currently not available for purchase in IPHIS. If you need assistance procuring this trap, please contact your survey supply coordinator.
6/29/12: For home-made traps, the bucket may range in size from one to five gallons. Previously, only 5 gallon buckets were acceptable.
Visual surveys may be used to detect larval populations before adults emerge. A trap and lure combination may be used to detect adult populations. See the Pest Datasheet for survey instructions. See USDA (2010) for instructions on making a Home-made 5 gallon bucket trap.
6/29/12: The length of effectiveness of all three palm weevil lures (Rhynchophorus ferrugineus Aggregation Lure; Rhynchophorus palmarum Aggregation Lure; and Palm Weevil Lure, Ethyl Acetate) has been changed from 84 days to 42 days. The release rates and longevity of the lures are also based on temperature (i.e., the release rate increases at higher temperatures). Lures may need to be changed more frequently in hot, dry regions such as Texas and California.
At the present time, it appears that placing pheromones for both R. ferrugineus and R. palmarum, the South American Palm Weevil, in the same trap is an acceptable practice. Therefore, if both pests are targets, the trap should be baited with the pheromone lures for R. ferrugineus and R. palmarum, ethyl acetate, and the food bait. See USDA (2010) for survey instructions on making the Homemade 5-gallon bucket trap.