Pratt CarolineHickling Graham, J2008-12-041993-061177-6242https://hdl.handle.net/10182/699The objective of this trial was to assess the effectiveness of cholecalciferol as a toxin for control of free-ranging, bait-shy possums in the MacKenzie Basin. A field trial was undertaken between January and March 1993 to evaluate the use of the toxin cholecalciferol for control of possums (Trichosurus vulpecula) in the MacKenzie Basin. The work was done in an area containing possums that exhibited bait-shy behaviour towards standard sodium monofluoroacetate (1080) baits. The trial was undertaken by staff from Manaaki Whenua - Landcare Research, Christchurch, with assistance from the senior author of this report.pp.1-11enbrushtail possumTrichosurus vulpeculabait shynessbaitscholecalciferol1080sodium monofluoroacetatebait aversionvertebrate pest controlMackenzie BasinOtherMarsden::300803 Natural resources managementMarsden::300603 Pests, health and diseasesANZSRC::0502 Environmental Science and Management