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230 H. O. Schooley. J.W.E. Harris and B. Pendrel
been accepted and no introductions or releases have been made since 1969. The search
for surviving introduced predators was discontinued in 1969, 1971. and 1978 in both New
Brunswick and Nova Scotia (D.O. Greenbank. personal communication). in Newfoundland
(Bryant 1971). and in British Columbia (Harris & Dawson 1979). The history of
predator releases and recoveries tabulated by Clark et al. (1971) has been updated
Table 55 Open releases and recoveries of predators against Adelges piceae (Ratz.)
Year of
Species and province Year Origin Number Recovery
Adalia luteopicta Mulsant
Newfoundland 1960 India 159
Adalia ronina (Lewis)
Newfoundland 1961 Japan 67
Nova Scotia 1963 Japan 290
New Brunswick 1960 Japan 25 1960
1962 Japan 37 1962
1963 Japan 585 1963
Adalia tetraspilota (Hope)
Newfoundland 1960 India 33
Aphidecta obliterata (L.)
Newfoundland 1959 Czechoslovakia 735
1960 Germany 934
1962 Czechoslovakia 848
1963 Germany 989
1964 Germany 1 187
1965 Czechoslovakia 185
Germany 267
1966 Czechoslovakia 509
1966 Austria 1380 1966
1967 Austria 4288 1967
1968 Germany 1096 1968
and Austria
Nova Scotia 1964 Germany 1 773 1967
1966 Austria 370
Norway 47
1967 Norway 422
New Brunswick 1962 Germany 1827 1962
1963 Germany 3157 1963
British Columbia 1960 Germany 1050
1961 Germany 1 141
1962 Germany 796
1963 Germany 1997
1965 Czechoslovakia 660
1968 Germany 1069
1969 Germany 420
Aphidoletes thompsoni (Mohn)
Newfoundland 1959 Czechoslovakia 3 124
Germany 25 952
1962 Germany 270 1961
1963 Germany 5201