Inhibitory effect of Tamarindus indicaand Carica papaya on egg hatch larvamortality of Meloidogyne incognita

Abstract

Essentially, the most effective control of plant parasitic nematodes involves the useof synthetic nematicide. However, apart from their very high cost, increased concernon the environment has necessitated a reduction in the amount of nematicides usedfor nematode control. In view of these, this research work was conducted to evaluatethe effects of different concentrations of root extract ofTamarindus indicaandCarica papayaat different concentrationsS(100% concentration),“S/2”(50%concentration),“S/10”(10% concentration) and“S/100”(1% concentration) in theinhibition of egg hatch and mortality of larva of root-knot nematode,Meloidogyneincognita.The experiment was laid out in a completely randomised design andreplicated four times. Combination of equal proportion ofT. indicaandC .papayaroot extract indicated that all the concentrations inhibited egg hatch. The standardsolutionSof all the selected botanicals were more toxic and effective at (p≤0.05)than the other concentrations. Similarly, combinations of root extracts ofT. indicaandC. papayawere the most effective of all the selected botanicals in the inhibitionof egg hatch and larvae mortality, followed byT. indicaroot extracts and thenC. papayaroot extracts.