Effect of temperatures and fig root leachate on hatch of Heterodera fici

Abstract

The hatch of Heterodera fici in fig root leachate, soil extract, and distilled water was investigated by incubating newly formed cysts of the nematode at 10, 15,20,25 or 30 0 The fig root leachate and temperatures greatly influenced the emergence or second stage juveniles, More than 85% or the eggs hatched altet' three weeks at 20 and 25°C, At 30°C, about 50% or the eggs hatched arter 4 weeks, but no juveniles emerged therealter. The hatching was slow at 15°C and reached 60% after 6 weeks, No hatch occurred at lO°C in fig root leachate, and at all temperatures in soil extract and in distilled water.