Journal
NEW ZEALAND JOURNAL OF ZOOLOGY
Volume 42, Issue 2, Pages 104-118Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/03014223.2015.1029496
Keywords
anthraquinone; d-pulegone; poison; Rattus norvegicus; Rattus rattus; Trichosurus vulpecula
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Funding
- New Zealand Foundation for Research, Science and Technology
- New Zealand Animal Health Board
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Repellents used to reduce by-kill of birds during pest control must not compromise acceptance by target species. Two repellents combined, anthraquinone (AQ; 0.4 g kg(-1)) and d-pulegone (DP; 1.0) did not reduce the palatability of blue-coloured carrot baits to laboratory rats (Rattus norvegicus); nor did DP (2.0). Green-coloured carrot baits coated with AQ, DP or AQ + DP were taken from bait stations by wild possums (Trichosurus vulpecula) and rats. Toxic (1080) bait coated with AQ (0.4) and peanut oil (0.1) had reduced palatability but was accepted by laboratory rats. However, laboratory rats did not consume enough baits coated with AQ and bacon, peanut butter, cinnamon or DP to be killed. Anthraquinone (0.4 or 0.8) plus cinnamon and DP (0.5) did not affect palatability or lethality to captive ship rats (R. rattus) or possums. Anthraquinone and DP as surface coatings on baits are therefore acceptable to possums and possibly rats, at concentrations that deter some bird species.
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