EFFECTS OF TREATED MUNICIPAL WASTE WATER ON MELOIDOGYNE JAVANICA EGG HATCH AND PENETRATION

Abstract

Eggs of Meloidogyne javanica were exposed in vitro to increasing concentrations of treated municipal waste water CTMWW) aver a period of 8 days. Hatched juveniles (J2) were extracted and counted every 2 days. Juveniles that hatched from day 6 to day 8 were used as inoculum to determine their capability to invade tomato roots under greenhouse conditions. TMWW suppressed egg hatch at all concentrations, at least 4 days after incubation. After day 4 the hatch suppression was proportional to TMWW concentrations, or incubation period. Hatch suppressions C% of control) at day 8 were 11.3, 27.8, 34.4 and 51% at concentrations of 25,50,75, and 100% TMWW, respectively. Invasion of tomato roots by the hatched juveniles was not adversely affected.