16—Lancaster Farming, Saturday, October 16,1971
Research Underway to Control Gypsy Moth
The synthetic sex lure of the
gypsy moth will be tested for its
potential in controlling this pest,
under a $392,000 cooperative
agreement between the U.S.
Department of Agriculture
(USDA) and the Pennsylvania
Agricultural Experiment Station,
State College.
The gypsy moth is a threat to
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forests and ornamental trees in
the Northeast.
USDA’s Agricultural Research
Service (ARS) will provide
$370,00 and the Experiment
Station an additional $22,000 for
the 2V 2 -year study, which may
help minimize problems of en
vironmental pollution caused by
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the insect and by pesticides used
against the pest.
Gypsy moth caterpillars
defoliate about 400,000 acres of
trees annually in fhe Northeast,
and are spreading to other areas.
Evergreens can be killed by a
single defoliation, and suscep
tible hardwoods, such as oak,
birch, and apple trees, can be
killed by two defoliations.
ARS scientists reported
discovery of the chemical
identity of the gypsy moth’s sex
lure last November, then syn
thesized the natural attractant,
which they named disparlure.
In Pennsylvania areas infested
by gypsy moths, experiment
station scientists led by Dr. E.
Alan Cameron, station- en
tomologist, will develop
techniques for using disparlure to
suppress the pest. Traps baited
with disparlure will be
distributed in areas of low in
festations to determine if male
moths are trapped in sufficient
numbers to significantly reduce
the number available to mate
with female moths. Success of the
traps would drastically reduce or
almost eliminate the next
generation of caterpillars, which
is the damaging stage rather
than the adult moths.
In another phase of the study,
both sparse and dense in
festations will be exposed to
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broadcast applications of
disparlure. This treatment may
so confuse males seeking female
moths that the males will die in
exhaustion before locating
mates. Laboratory studies under
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more precisely controlled con
ditions will also be made.
Dr. H C Cox, Director of the
ARS Entomology Research
Division, will represent USDA in
this project.
Sales & Service
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Call 717-354-7481
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