20 Boffa Miskell Ltd | Pest Animal Management Plan | Wharekirauponga Compensation Package | 30 May 2022 6.0 Control methods - Ground-based toxic baiting 6.1 Overview Both rats and possums will be targeted using the same network of tree-mounted Philproof bait stations to allow for ongoing suppression. Bait stations will contain either DoubleTap (diphacinone and cholecalciferol) or cholecalciferol. These baits are recommended for Wharekirauponga as both of these toxic baits will also kill mice, although their effectiveness at controlling mouse populations will depend on the density of bait stations (recommended as 100 m lines with stations every 50 – 100m). 6.2 Bait stations locations, bait type & target species A permanent bait station network will be established across the WAPMA, targeting rodents and possums, and will supplement the permanent trap network. Recommended bait station locations are described alongside the trap spacings in Section 7.0 and shown in Map 4, which include: • To continue to suppress the resident rodent and possum population, both of these species will be targeted using tree-mounted Philproof bait stations containing either DoubleTap (diphacinone and cholecalciferol) or cholecalciferol. Both of these toxic baits will kill mice, but their effectiveness at controlling mouse populations will depend on the density of bait stations. Neither of these toxins require a Controlled Substance License to use, and both are low residue and are effective for both target species. Cholecalciferol, where used, will require pre-feeding for best effect. • Following the initial toxic control, continued control will occur primarily via trapping. If possum numbers exceed 10% CCI (the threshold for additional control as per Section 12.2), an additional toxic control operation using Feracol strikers (which contain cholecalciferol as the main ingredient), will be deployed at the same locations as ratspecific bait stations. Note Feracol (i.e. cholecalciferol bait) requires pre-feeding for the best results. Other toxins approved for targeting possums may be used such as Feratox biobags, however, note this toxin requires a Controlled Substance License to use. • Para-aminopropiophenone (PAPP) provides an additional control tool targeted specifically at stoats and feral cats. It is a vertebrate pesticide that was registered in New Zealand in 2011 as a new tool for the control of stoats and feral cats, and it is currently being evaluated for ferrets. Toxic baiting using PAPP for stoats should follow the methods outlined in Dilks et al. (2011). Detailed best practice guidelines exist for feral cat control using PAPP (Boffa Miskell Ltd, 2018), which should be followed for any toxic operation undertaken with PAPP. PredaSTOP™ (which contains PAPP as the active ingredient) can only be purchased and used by persons who are Approved Handlers and hold a Controlled Substance License (CSL) with an endorsement for PAPP.
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