Abstract
Root-knot disease poses a worldwide problem to agriculture; hence, several environmentally hazardous chemical nematicides are being used to control it. Rhizobacteria could be one of the important biocontrol agents which can replace these chemicals. This study focused on the effect of bacterial cell-free culture filtrate against Root-knot nematodes. Experiment was conducted to observe the effect of different dilutions of cell-free culture filtrate on Meloidogyne incognita under laboratory and in greenhouse conditions. In laboratory, toxicity effect of filtrate was recorded on second stage juveniles (J2), 100% mortality was recorded in all treatment above the 75% concentration. In greenhouse, all the growth and nematode induced parameters were significantly differed after culture filtrate treatment to the tomato plants. The finding indicates the capability of fluorescent Pseudomonad's culture filtrate as a powerful biocontrol tool for the management of Root-knot nematodes.
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