Abstract
Sirex noctilio was first detected in Chile in the Valparaiso Region in 2001. This led to an intensive attempt to eradicate the pest. The same year and after the detection of the pest in Los Lagos Region and its expansion to other regions north to Los Lagos, actions to deal with the pest were focussed on its containment and suppression. With this goal, Chile implemented quarantine and biocontrol measures with the parasitic nematode Deladenus (=Beddingia) siricidicola and the insect parasitoids, Megarhyssa nortoni and Rhyssa persuasoria. Ibalia leucospoides had been independently introduced earlier. Research and technical programs financed mainly by the Chilean Government in collaboration with private forestry companies and the regulations and measures implemented by the Servicio Agricola y Ganadero made it possible to maintain the Sirex populations at tolerable limits. An important result of the control programs have been the successful establishment of various biological control agents and growing levels of parasitism of D. siricidicola.
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