Factors influencing parasitism of Sirex noctilio by the nematode Deladenus siricidicola in summer rainfall areas of South Africa Hurley,B.P.; Slippers,B.; Croft,P.K.; Hatting,H.J.; Linde,M.vander; Morris,A.R.; Dyer,C.; Wingfield,M.J. Biological Control: 3, 450-459 2008 https://eurekamag.com/research/031/412/031412889.php