Sirex noctilio [biological] control program in response to the 1987 Green Triangle outbreak [Pinus radiata plantations; southeastern South Australia and southwestern Victoria]
1990
Haugen, D.A. (Western Australian Dept. of Agriculture, Glen Osmond. Waite Agricultural Research Inst.) | Underdown, M.G. (Woods and Forests Dept., Mt Gambier (Australia))
The major response was to inoculate 147 000 trees with the parasitic nematode Deladenus siricidicola. Also, projects to salvage sirex-infested trees and to release the parasitoid Megarhyssa nortoni were implemented. Productivity and costs were calculated for the seven procedures used to introduce the nematode. Efficiency was increased by using machines to fell and delimb the trees and by redesigning the inoculation hammer. Knowledge gained from this outbreak should prompt a review of the control recommendations. Forest managers should implement a rigorous control program, as soon as sirex is detected in a region, to minimise the risk of a future outbreak.
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