Abstract
Abstract Comparisons of extent of decay in southern red oaks (Quercus falcata Michx.) revealed that trees injected with 2,4-D decayed sooner than girdled trees. Internal examinations of treated trees revealed that girdling and injection permitted growth of heartwood- and sapwood-decaying fungi, a condition necessary for woodpecker nest cavity excavation. As a result of the delayed decay, girdling produces better woodpecker habitat in southern red oak. Girdled southern red oaks remain standing longer for woodpeckers to use as foraging and nesting sites. Numbers of snags required to support various percentages of woodpecker population maximums are presented.
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