Combined Effect of Pseudomonas fluorescens and Arbuscular Mycorrhizal Fungi on Meloidogyne incognita Infecting Solanum melongena L.
Combined Effect of Pseudomonas fluorescens and Arbuscular Mycorrhizal Fungi on Meloidogyne incognita Infecting Solanum melongena L.
Wafaa M. A. El-Nagdi1*, Ahmed E.A. Mahgoob2, Mahmoud M.A. Youssef1, Mona M.S. Zayed3, Entesar H. Taha2 and Nora R.A. Saleh1
ABSTRACT
Sole and consortium treatments of four isolates of Pseudomonas fluorescens (Pf1, Pf2, Pf9 and Pf10) with arbuscular endomycorrhizal fungi (AMF) on root-knot nematode, Meloidogyne incognita (Ne) on eggplant (Solanum melongena L.) were evaluated. In general, the combined treatments by AMF and Pf isolates decreased significantly (P≤0.05) root-knot nematode as indicated by numbers of egg masses, eggs and galls per root system more than single treatments. Co-toxicity% for the two applied combined treatments of each bacterial isolate+ AMF, added at the same time with nematode (Ne) or added at 7 days before Ne inoculation, showed additive or synergistic interaction effects. The tested isolates increased significantly (p≤0.05) plant growth criteria according to the tested materials. The same isolates +AMF with Ne at the same time recorded less colonization percentage (35%), while 40% root colonization was achieved when added at 7 days before nematode inoculation. Also, when AMF alone was applied at 7 days before nematode inoculation, it caused the highest percentage of colonization (60%). It could be concluded that the consortium treatment with AMF and P. fluorescens significantly decreased M. incognita on eggplant more than single treatments.
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