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Protecting the Urban Forest:
Aliens, Biological Control, and Pests
By Ken Fry, PhD
T he urban forest is a highly disturbed,
albeit managed, ecosystem. Quite
often the trees in an urban
forest are isolated, planted in
sub-optimal conditions, or subject to
minimal maintenance. These conditions
are considered to be highly disturbed in
ecological terms. Compounding the stresses
arising from these conditions is the risk of
introduction of alien invasive species as a
result of trade occurring on a global scale.
This article discusses alien invasive
species, their routes of entry, actions taken
to detect and mitigate their threat, and
review methods to mitigate pest threats to
trees in the landscape.
14 March 2014
2/26/14 2:00 PM