Canadian Forest Service Publications

Establishment of Olesicampe geniculatae Quednau and Lim (Hymenoptera : Ichneumonidae) to control the mountain ash sawfly, Pristiphora geniculata (Hartig) (Hymenoptera: Tenthredinidae), in Newfoundland. 1994. West, R.J.; Dixon, P.L.; Quednau, F.W.; Lim, K.P.; Hiscock, K. The Canadian Entomologist 126: 7-11.

Year: 1994

Issued by: Laurentian Forestry Centre

Catalog ID: 16590

Language: English

Availability: PDF (request by e-mail)

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Mated female Olesicampe geniculatae Quednau and Lim were released in St. John's, Newfoundland, to establish a biological control against the mountain ash sawfly, Pristiphora geniculata (Hartig). Two hundred and fifty-nine females were released during 1981-1984 in a field cage constructed over a mountain ash tree and provided with thousands of host larvae; 171 females were released outside the cage in 1984. A second open release of 368 P. geniculata cocoons, obtained as larvae from the field cage and presumably parasitized by 0. geniculatae, was made in 1986 at Pasadena in western Newfoundland. Olesicampe geniculatae rapidly established in the St. John's area where host populations dropped to insignificant levels by 1990. Island-wide monitoring during 1989 and 1990 indicated that 0. geniculatae had spread to the west and south coasts, at rates as high as 50 km per year. Effective and persistent suppression of P. geniculate by 0. geniculatae is anticipated.