Summary
Procedures for the control of Sirex noctilio are described for the Pinus radiala plantations of southeastern South Australia and southwestern Victoria. Sirex was detected in this region during 1977, and a major outbreak occurred in 1987. Limitations of these procedures in providing adequate control are discussed. To reduce the risk of an outbreak, managers need to: 1) follow an optimum thinning schedule to maintain stand vigour, 2) accurately monitor sirex populations, 3) introduce biological control agents at the appropriate time and levels, and 4) evaluate the distributions and population levels of the biological control agents.