Inhibitory effect of Tamarindus indica and Carica papaya on egg hatch larva mortality of Meloidogyne incognita

Abstract

Essentially, the most effective control of plant parasitic nematodes involves the use of synthetic nematicide. However, apart from their very high cost, increased concern on the environment has necessitated a reduction in the amount of nematicides used for nematode control. In view of these, this research work was conducted to evaluate the effects of different concentrations of root extract of Tamarindus indica and Carica papaya at different concentrations S (100% concentration), “S/2” (50% concentration), “S/10” (10% concentration) and “S/100”(1% concentration) in the inhibition of egg hatch and mortality of larva of root-knot nematode, Meloidogyne incognita .The experiment was laid out in a completely randomised design and replicated four times. Combination of equal proportion of T. indica and C .papaya root extract indicated that all the concentrations inhibited egg hatch. The standard solution S of all the selected botanicals were more toxic and effective at ( p ≤ 0.05) than the other concentrations. Similarly, combinations of root extracts of T. indica and C. papaya were the most effective of all the selected botanicals in the inhibition of egg hatch and larvae mortality, followed by T. indica root extracts and then C. papaya root extracts.