Proceedings of the Vertebrate Pest Conference
Porcupine damage and repellent research in the interior Pacific Northwest
- Author(s): Witmer, Gary W.
- Pipas, Michael J.
- et al.
Published Web Locationhttps://doi.org/10.5070/V418110267
Porcupines (Erethizon dorsatum) rely on trees and shrubs for winter food and can cause serious, localized damage to conifers. Twenty-two percent of ponderosa trees (Pinus ponderosa) examined in southeastern Washington were damaged by porcupines. Most damage involved complete girdling of the mid- to upper boles of the larger trees (12 to 30 cm dbh) in the stand. Preliminary repellent trials with captive porcupines suggested that several materials might reduce tree damage, especially predator-associated odors. Field trials are needed to assess efficacy and duration of protection under ambient winter conditions.