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Effectiveness of repellents for reducing damage to eucalypt seedlings by browsing mammals


Miller, AM and O'Reilly-Wapstra, JM and Fitzgerald, H and Paterson, SC and Stam, L and Walsh, A and Wardlaw, T and Potts, BM, Effectiveness of repellents for reducing damage to eucalypt seedlings by browsing mammals, Australian Forestry Journal, 71, (4) pp. 303-310. ISSN 0004-9158 (2008) [Refereed Article]

DOI: doi:10.1080/00049158.2008.10675049


Marsupial herbivores cause significant damage to seedlings in forestry operations. Damage can lead to changes in tree form, reduced growth rates and seedling death. Non-lethal tactics, as a component of an integrated browsing management strategy, are currently sought to assist in reducing this amount of damage. One such tactic involves making seedlings deterrent or unpalatable through the application of chemical repellents. We investigated the effect of three chemical repellents, Plant Plus, Sentree and Hot Shot, upon browsing of Eucalyptus nitens seedlings by two marsupial herbivores known to browse newly established plantations in Tasmania; the common brushtail possum and the red-bellied pademelon. One repellent was designed to deter herbivores through an unpleasant odour (Plant Plus), one to be unpalatable (Hot Shot), and the third to be both deterrent and unpalatable (Sentree). We ran a combination of paired feeding trials (one repellent + control) and cafeteria trials (all three repellents at once with no control) with captive possums and pademelons, for three nights per trial. Both species consumed significantly more foliage from control seedlings than those treated with Plant Plus or Sentree repellents. Pademelons also preferred controls to Hot Shot treated seedlings but, interestingly, possums consumed significantly more foliage from seedlings treated with Hot Shot than control seedlings. The most effective repellent against both herbivores was Sentree, and the marked reduction in browsing indicates that further testing in the field is warranted.

Item Details

Item Type:Refereed Article
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Forestry sciences
Research Field:Forest health and pathology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Forestry
Objective Field:Hardwood plantations
UTAS Author:Miller, AM (Dr Alison Miller)
UTAS Author:O'Reilly-Wapstra, JM (Associate Professor Julianne O'Reilly-Wapstra)
UTAS Author:Fitzgerald, H (Mr Hugh Fitzgerald)
UTAS Author:Potts, BM (Professor Brad Potts)
ID Code:54627
Year Published:2008
Web of Science® Times Cited:6
Deposited By:Plant Science
Deposited On:2009-02-26
Last Modified:2009-05-26

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