Fig. 1 Main characteristics of the 47 studied residues (A) compared with published data: Collins et al., 1990 (B); Constantidines and Fownes, 1994 (C); Cotrufo et al., 1994 (D); Fox et al., 1990 (E); Frankenberger and Abdelmagid, 1985 (F); Herman et al., 1977 (G); Iritani and Arnold, 1960 (H); Kachaka et al., 1993 (I); Mafongoya et al., 1998 (J); Müller et al., 1988 (K); Oglesby and Fownes, 1992 (L); Palm and Sanchez, 1991 (M); Quemada and Cabrera, 1995 (N); Reinertsen et al., 1984 (O); Seneviratne et al., 1998 (P); Taylor et al., 1989 (Q)