The southern pine beetle (SPB) is one of the most
destructive forest insects in the southeastern United States. This native bark
beetle is smaller than a grain of rice, but can rapidly devastate pine dominated
forests by burrowing into the cambium layer under the bark to lay their eggs.
The S-shaped tunnels or “galleries” they create and the blue stain fungi they
transmit cut off the flow of water and nutrients to the tree, resulting in
death within a few weeks. The tell-tale signs a tree is infested include yellowish needles
that quickly turn brown, and yellowish-white sap oozing from pitch tubes on the
trunk.
SPB attacks all species of pine, including pitch,
pond, and loblolly, all of which occur in Southern New Jersey. Since 2010,
27,000 acres of the million-acre New Jersey Pinelands have been impacted. USDA
Forest Service estimates 80% of the pine forest could be affected within the
next 10 years if action is not taken.
To reduce the risk of SPB infestations forests must
be actively managed. Healthy trees are more resistant to pine beetle attacks.
Trees should be thinned so they are spaced 20 feet apart or greater. Thinning
in this manner not only promotes forest health, but interrupts pheromone
communication between the pine beetles.
To control SPB populations and their spread,
foresters must remove actively infested trees. Harvested trees should then be sold
to a saw mill. The New Jersey State Forest Service has been effectively managinginfestations on state-owned lands by hand-cutting small stands of infected
trees. In larger infested areas, contractors with mechanized equipment have been
hired.
Fortunately, the Department of Environmental
Protection recently announced that impact from SPB in 2012 was less than
anticipated. In an effort to take advantage of the pine beetles’ reduced
activity, the DEP is working with the DEP Science Advisory Team and other
researchers to attempt to understand its behavior patterns in New Jersey and to
develop strategies to combat its spread.
The DEP encourages local governments and private
property owners to apply to the New Jersey State Forestry Service for financial
assistance to combat pine beetle on non-state land. For more information visit
www.southern pinebeetle.nj.gov.
Areas of the New Jersey Pinelands impacted by SPB can
become more fire-prone due to an increase of standing dead trees and
accumulated needles on the ground. Reduced tree canopy allows vegetation on the
forest floor to dry out resulting in increased wildfire risk, especially during
fire season.
Recognizing their vulnerability to wildfire, six
homeowner associations bordering the Pinelands have become recognized as
Firewise communities. Several other homeowner associations are now engaged in
taking the steps to becoming recognized. Most Firewise projects initiated by
these communities are focused on creating wide fuel breaks of at least 100 feet
around the perimeter of these communities, often bordering along existing
roadways. Dead standing trees are removed, existing canopy trees and ladder
fuels are reduced, and the lower limbs of remaining trees are pruned to 15
feet.
It is important for other at-risk communities in
southern New Jersey to consider taking steps to reduce their vulnerability to wildfire
through the Firewise Communities /USA Recognition Program.
Want to learn more about what you can do in your area? Contact Heidi Wagner, Firewise Advisor for the Northeast Region at firewiseheidi@nfpa.org or 845-210-7007 for more information.
