Viability studies of Pseudomonas fluorescens, Pf 1 in liquid formulation, its effect on plant growth and on root knot nematode, Meloidogyne incognita

K SANKARI MEENA; E I JONATHAN; K DEVRAJAN

doi:10.56093/ijas.v84i8.43137

Authors

K SANKARI MEENA Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore 641 003
E I JONATHAN Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore 641 003
K DEVRAJAN Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore 641 003

https://doi.org/10.56093/ijas.v84i8.43137

Keywords:

Liquid formulation, P. fluorescens, Plant growth, Root knot nematode, Viability

Abstract

Viability of Pseudomonas fluorescens, Pf 1 in liquid formulation amended with different chemicals was studied for a period of one year. Among the amendments tested, NB with 10 mM glycerol showed maximum viability of Pf 1 cells (360 days). Similarly, in stickers, NB with starch (2%) showed the maximum viability of Pf 1 cells (240 days). Plant growth promotion studies carried out in tomato cv Co3 under roll towel and pot culture method revealed that fifth day old culture of Pf 1 showed enhanced plant growth when compared with other subsequent day old cultures. Under in vitro studies against Meloidogyne incognita, the same fifth day old culture at its 25 per cent concentration recorded the least egg hatching and maximum juvenile mortality. However, the efficiency of different days old cultures remained effective over control for a period of one year when stored as liquid formulation along with chemical amendments.

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