S.P.W. PheroLure® Data Sheet

(Cylas brunneus)


Trapping system

The Yellow Bucket Funnel Trap with extension is used in the capturing of Sweet potato weevil (Cylas puncticolilis).  The Yellow Bucket Funnel Trap with extension consists of five (5) main parts (dome lid, funnel, bucket, white plastic lure cage and extension), which slide into each other. The trap comes with a trap hanger that can attach to the dome lid to be used to hang the trap. The semiochemical lure is placed inside the white plastic lure cage in the top of the dome lid. A dichlorvos block is placed in the bottom bucket of the trap, which kills all insects entering the trap.

S.P.W. PheroLure®

The rubber septa used to attract Sweet potato weevils that go into the trap is known as the S.P.W. PheroLure®. The S.P.W. PheroLure® needs to be replaced every six (6) weeks. Any extra S.P.W. PheroLure® should be kept in their individual foil pouches in a fridge in order to prolong their shelf life.

How, where and when to hang traps

  • How: Always hang the trap 30cm above the crop canopy. This will allow for maximum airflow, to distribute the semiochemical molecules (which are heavier than air), across the field. Place the trap out of the way of farm implements and the direct reach of spray machines / irrigation systems. Secure the trap firmly to the pole/stand so that it does not sway in the wind. Identify each trap by a trap/block number for later reference.
  • Where: A map layout of the field will assist in correct placement of traps. In fields that are uniform with respect to topography, size and windbreaks, hang traps at a density of 1 trap per 5 – 10 ha. This is the maximum area that can be monitored by a single trap. A higher density may be necessary in fields that are unevenly shaped, have excessive slopes/hollows, or where the prevailing wind may adversely affect trap catches.
  • When:  Field crops: one week after germination or transplanting date.

Inspection and maintenance of traps

  • Inspection: The traps should be inspected weekly on the same day of each week (7-day intervals). The number of Sweet potato weevils caught in the trap bottom, together with the trap number and date needs to be recorded.
  • Maintenance: The bucket trap needs to be cleaned on a regular basis, even if no moths have been caught. The trap bucket tends to get clogged with dust, by-catch and other foreign matter over time.

Disposal of lures

S.P.W. PheroLures® need to be replaced every six (6) weeks. Used S.P.W. PheroLures® can be disposed of in the garbage. No special precautions are required as S.P.W. PheroLure® is considered of no concern to human and environmental health. The dichlorvos block needs to be disposed of according to local regulations for disposal of hazardous waste.


  • S.P.W. PheroLure® is sold in individual foil pouches at 3 per pack, or in bulk at 100 per pack in a big foil pouch.
  • Dichlorvos blocks are sold in foil pouches at 2 per pack.