Effect of some aqueous plant extracts on egg hatching of Meloidogyne incognita (Kofoid and white) chitwood, the root-knot nematode

Root-knot nematode disease had been effectively and mostly controlled by synthetic nematicides which have been confirmed to be the source of food, water and environmental pollution. A study was conducted to evaluate potential of aqueous extracts from mint, ginger, garlic, marigold and eucalyptus in controlling the hatch of eggs of the RKNs, Meloidogyne incognita. Five concentrations of water soluble extracts from the five plant species were filtered, added to petridishes and infested with eggs of M. incognita. The AMinE was the most effective in delaying and suppressing hatching. Lowest concentration i.e. 0.5% AMinE caused delay upto 19 hours with 2.3% of hatch in comparison to 17 hours delay in 0.5% AGarE and AGinE with 3% and 3.8% of hatch. AMarE was least effective as the delay was 14 hours in 0.5% AMarE with 5.2% egg hatch.