The European (EU) race of Gremmeniella abietina (Lagerb.) Morelet, the
causal agent of scleroderris canker of conifers, is a damaging pathog
en in pine forests. In North America, this disease is found in the nor
theastern United States and in eastern Canada. Results from surveys co
nducted across Canada since 1979 are updating us on where this disease
is found. In Newfoundland, only the EU race has been recorded and it
is restricted to the Avalon Peninsula. Contrary to earlier reports in
the Maritime provinces, only one pine plantation is infected by the EU
race in New Brunswick. In Ontario, a total of 171 plantations are inf
ected and they are clustered in the central portion of the southern pa
rt of the province. The number of plantations infected by the EU race
in Quebec is the highest in Canada with 749 plantations. In the four p
rovinces, the most infected species is red pine (86% of the infected p
lantations), followed by two exotic species, Scots pine (9.5%) and Aus
trian pine (3.2%). White pine and jack pine show resistance to the dis
ease.