Evaluation of Bio-Agents on Egg Hatching and Larval Mortality of Root-Knot Nematode (Meloidogyne incognita)
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- Egg Hatching, Larval Mortality, M Incognita, T Viride P Lilacinus, P Fluorescens, P Penetrans
- Popal, Noor Ahmad
- In vitro experiments was conducted to study the efficacy of different bio-agents Viz., Trichoderma viride, Paecilomyces lilacinus, Pseudomonas fluorescens and Pasteuria penetrans on egg-hatching and larval mortality of M. incognita. All the bio-agents suppressed egg hatching and viability of freshly hatched second stage juveniles of the nematode. After 24, 48 and 72 hours of inoculation at all three concentrations, P. fluorescens and P. lilacinus were on par with each other and were superior over T. viride and P. penetrans on egg hatching of the Nematode. However, T. viride was superior over P. penetrans as against untreated check. While, regarding larval mortality of the nematode at 1.0 and 1.5 per cent concentrations and after 24 and 48 hours of inoculation, P. lilacinus and P. penetrans were on par with each other and were superior over T. viride. Whereas P. fluorescens was superior over T. viride. But at 2 per cent concentration P. fluorescens was significantly superior over T. viride and was on par with P. lilacinus and P. penetrants. However, positive correlation was evinced between levels of concentrations, exposure period and the egg hatching and larval mortality.
Full text: IJRAS_839_FINAL.pdf