Nematostatic activity of D-amino acids on the viability of root-knot nematode

The effect of the D-amino acids viz. D-Glycine, D-Methionine and D-Phenylalanine at three concentrations (100, 200 and 400 μg/mL) on the root knot nematode Meloidogyne javanica were estimated in vitro conditions. Data showed that the tested amino acids caused significantly reduction (P≤0.05) in all treatments, compared with check, where using D-Phenylalanine at 100 μg/mL conc. was recorded the best reduction in mean of second-stage juveniles hatched from egg-masses (14.3) and hatching inhibition percentage (6.24%), while treatment with D-Glycine and D-Methionine at 400 μg/mL conc. (59.33, 59.00 & 26.67) recorded the best reduction flowed by D-Phenylalanine in mean of dead second-stage juveniles and reduction mortality percentages (77.67 and 73.09%) compared with other treatments and check.