Root-knot nematodes are serious pests that cause losses of a wide range of different crops. Nematodes are controlled mainly by nematicides which cause pollution and have serious effects on all living organisms including human beings. Therefore, discovering alternative methods to control plant parasitic nematodes was attempted during the last few years to avoid pesticides hazards. Four species of marine algae (Ulva lactuca, Jania rubens, Laurencia obtusa and Sargassum vulgare) were tested to control root-knot nematode, (Meloidogyne spp.) infecting banana plants (Musa spp.). All the treatments significantly (p ≤ 0.05) reduced the rate of build-up compared with the check. U. lactuca alga gave the best results in reducing the number of galls (73.68%) and the final population of nematode (56.78%). The chemical analysis of all tested materials revealed that U. lactuca had the highest amount of phenolics (10.39 mg GAE/g dry wt). This may explain the remarkable high capability of U. lactuca to control root-knot nematode infections. Also, the same alga was the best treatment and showed maximum growth when compared with other algae and the check. For instance, shoot weight of U. lactuca surpassed the other treatments, even that of non-nematizied check one, giving high increase percentage.
Russian Journal of Marine Biology – Springer Journals
Published: May 6, 2014
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