Effect of different temperatures on egg hatch of Meloidogyne artiellia

Abstract

The hatching of Meloidogyne artiellia in chickpea root leachate and distilled water was studied by incubating egg masses of the nematode either at 5 or 10°C for 10, 20 or 60 days and then at 20oC, or continuously at 5, 10, 15, 20, 25 or 30°C. The chickpea root leachate did not influence egg hatching but temperature greatly affected the emergence of second stage juveniles. There were no differences in the hatch of the eggs incubated for 10, 20 or 60 days at 5 or lO°C and then at 20°C. With continuous incubation at IS-25°C more than 90% of the eggs hatched in 3 weeks. At 30°C about 70% of the eggs hatched after one week but no juveniles emerged thereafter. The hatching was slow at lO°C and very slow at 5°C, with 90% or 80% of the eggs hatching after eight weeks or four months, respectively.