Novel phytoalexins including elemental sulphur in the resistance of cocoa (Theobroma cacao L.) to Verticillium wilt (Verticillium dahliae Kleb.). - Resende,M..L..V..; Flood,J..; Ramsden,J..D..; Rowan,M..G..; Beale,M..H..; Cooper,R..M.. (Physiological and Molecular Plant Pathology, 1996)