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The first reported find in Canada occurred in Québec in 1924 and then
in New Brunswick in 1936, in both instances the pest was eradicated. However,
the Gypsy moth became firmly established in Québec in the 1960's and
quickly spread into Eastern Ontario. Today, Gypsy moth is established in
southern Ontario, southern Québec, southwestern New Brunswick and
southwestern Nova Scotia.
Oaks (Quercus spp.) are the preferred host of this pest but over 300 other
tree species and shrubs are attacked among these are apple (Malus), alder (Alnus), aspen
(Populus), basswood (Tilia), hawthorn (Crataegus),
willow (Salix), beech (Fagus), birch (Betula), cherry
(Prunus) and maple (Acer).
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