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The caterpillars of the gypsy moth are destructive defoliators that feed primarily on oak trees causing growth loss, crown dieback, and tree mortality.
In the case of some insect infestations, particularly spruce budworm and gypsy moth , repeated defoliation can cause the death of trees over a large area of forest.
In summary, there is a complex interaction between host plant phenology effects and natural-enemy mortality for the gypsy moth .
Over the past 100 years, more than 20 biocontrol fly species have been released in Massachusetts for a variety of pests, including the browntail moth, the gypsy moth , and the Japanese beetle.
Surveillance is usually targeted at specific pests such as the Asian gypsy moth .
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