Pseudomonas fluorescens and arbuscular mycorrhizal fungi promote tolerance in black henbane against Meloidogyne incognita infection.

摘要

Effect of Pseudomonas fluorescens, Glomus intraradices, G. fasciculatum, G. mosseae was evaluated singly and jointly on the reproduction and infection potential of root-knot nematode, Meloidogyne incognita (Kofoid and White) Chitwood causing root-knot diseases of black henbane (Hyoscyamus niger) under glasshouse condition. Among the different treatments evaluated, AM fungi alone and in combination with P. fluorescens showed maximum fresh and dry biomass of H. niger as compared to untreated-uninoculated and untreated-inoculated control. Application of AM fungi and P. fluorescens reduced the population of M. incognita to a varied extent. The root colonization by AM fungi was higher in non inoculated treatments as compared to M. incognita inoculated plants. However, combined treatment also yielded higher root colonization by AM fungi. Although carbofuran showed a significant effect on suppression of M. incognita multiplication, it can be replaced to some extent by bioinoculants as shown in the present study to comply with environmental issues relating to the use of chemical pesticides.