Resurvey of Spruce Budworm Damage in the Moosehorn National Wildlife Refuge
- Devine, Michael E.
Maine Forest Service - Connor, Jonathan Y.
Maine Forest Service
The spruce budworm population in the Moosehorn Wild1ife Refuge in
Edmunds, Maine reached an extreme level in 1974 due to massive flights of
gravid female moths. Severe larval feeding occurred in 1975 and subsequently
the Refuge was recommended by the Maine Forest Service (M.F.S.)
for treatment in 7976.
The Refuge, managed by the United States Fish and Wildlífe Service
(U.S.F.W.S.), is maintained primarily for the preservation of wildlife
habitat. The no spray policy in the Refuge, adopted by the U.S.F.W.S.
in 1976, provided the M.F.S. an opportunity to assess the effects of an
uncontrolled spruce budworm infestation on a spruce-fir forest.
The M.F.S. conducted its first survey of the Refuge in February 1978.
In the original survey the untreated Refuge was compared to nearby sprayed
areas, but these areas were not protected as recommended after 1977. The
current resurvey evaluates the continuing deterioration of the spruce-fir
component in the Refuge, but sprayed versus unsprayed comparisons are
no longer possible.
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