“…Several studies on the chromosomal effect of pesticides have been made using CA; the positive results obtained showed a correlation with the exposure time (Dulout et al, 1985;Paldy et al, 1987;Rupa et al, 1989a;Carbonell et al, 1993;Joksić et al, 1997;Kaioumova & Khabutdinova, 1998;Cuenca & Ramírez, 2004;Zeljezic et al, 2009). Other positive results did not find correlation between the exposure time and the CA induction (Rita et al, 1987;Rupa et al, 1988, 1989b, 1991a, El-Ghazali et al, 1990Kourakis et al, 1992;Scarpato et al, 1996;Amr, 1999;Au, 1999;Antonucci & de Syllos Colus, 2000;Lander et al, 2000;Paz-yMiño et al, 2002;Sailaja et al, 2006); meanwhile others authors although also found positive frequency of CA but did not determined this correlation (Nehéz et al, 1988;Jabloniká et al, 1989;De Ferrari et al, 1991;Carbonell et al, 1995;Mohammad et al, 1995;Kourakis et al, 1996;Lander et al, 2000;Garaj-Vrhovac & Zeljezic, 2001, 2002Ascarrunz et al, 2006;Ergene et al, 2007;Mañas et al, 2009). As well negative results have been obtained (Mustonen et al, 1986;Steenland et al, 1986;Hoyos et al, 1996;D'Arce & de Syllos Colus, 2000;…”