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The study aimed to use two culture algal Spirulina platensis, Anabaena azollae, Azolla pinnata and Pleurotus columbinus besides olive mill waste in controlling root knot nematode, Meloidogyne javanica in banana was monitored under both laboratory and commercial greenhouse conditions. Laboratory experiment revealed that high juvenile mortality percentage occurred during all the exposure periods of all treatments, the best results were after 72 hr exposure. Spirulina platensis followed by Anabaena azollae, Azolla pinnata, Pleurotus columbinus and olive watery extract significantly increased juveniles mortality up to 70%after 72h at the highest concentration of 1:10 (85.2, 81.4, 79.9, 73.5, 71.7 and 70.1%, respectively). In the productivity greenhouse experiment, the combination of culture filtrates of Spirulina platensis, Anabaena azollae, Azolla pinnata, Pleurotus columbinus and olive mill waste water achieved the highest reduction in the number of total nematodes in both soil and roots, also in numbers of galls. In addition, all combinations significantly increased the crop yield of banana plants comparing with the individual treatment and the control. The combined treatments significantly enhanced the CO2 evolution, dehydrogenase and nitrogenase activities over the control. It could be recommended that application of biological control agents against root knot nematode in banana is preferable to reduce the chemical nematicides inputs.

Comparative Efficacy of some Algal Species, Azolla, Pleurotus and Olive Mill in Controlling Root Knot Nematode on Banana