Effect of treated sewage on egg hatch and inefectivity of tylenchulus semipenetrans

Abstract

When eggs of T. semipenetrans were incubated in sewage, stored, autoclaved or boiled-condensed sewage water, egg hatch was suppressed. The number of juveniles that hatched at 2, 9 or 15 days incubation was not significantly different between treatments. After 15 days incubation (end of the test), the cumulative (total) number of hatched juveniles was significantly less in all sewage water treatments than in distilled or tap water. Over 50% of the juveniles that hatched after 2 weeks incubation in sewage water treatments were immobile. The percent infectivity of juveniles that hatched after one week was significantly higher than those that hatched after 2 weeks. No significant differences in infectivity were found between treatments at one or two weeks.