Table 1.

Examples of important pests introduced into the United States and Canada.

Insect	First Found	Location
Elm leaf beetle	1834	Md.
purple scale	1857	Fla.
cottony cushion scale	1868	Cal.
gypsy moth	1869	Mass.
shothole borer	1878	—
San Jose scale	1881	Cal.
azalea bark scale	1881	D.C.
poplar and willow borer	1882	—
European elm scale	1884	N.Y.
larch case bearer	1886	Mass.
smaller European elm bark beetle	1904	Mass.
birch leafmining sawfly	1905	Nova Scotia
juniper webworm	1910	—
boxwood leafminer	1910	—
European pine shoot moth	1914	N.Y.
introduced pine sawfly	1914	Conn.
Japanese weevil	1914	—
imported willow leaf beetle	1915	—
Japanese beetle	1916	N.J.
Comstock mealybug	1918	N.Y., Cal.
satin moth	1920	Mass.. Br. Col.
Asiatic garden beetle	1922	N.J.
European pine sawfly	1922	Ottawa
birch leafminer	1923	Conn.
beech scale	1929	Mass.
white fringed beetle	1936	Fla.
European chafer	1940	N.Y.
andromeda lacebug	1946	Conn.