Interaction of VA mycorrhiza and root-knot nematode on tomato plants:effects of nematode sterilization [Sudan]
1997
Elsheikh, E.A. | Mirgani, A.M.O. (University of Khartoum Faculty of Agriculture, Shambat (Sudan))
The impact of VA-mycorrhizal fungi and root-knot nematodes, on tomato (Lycopersicon esculentum) plants. and the possibility of reducing the harmful effects of root-knot nematodes using VAM fungi, was carried out in pot experiments. The VAM fungus Glomus sp. significanty increased shoot and root dry weights and phosphorus (P) content of tomato plants infected or not infected with nematodes, whereas, Meloidogyne incognita significanty reduced them, in sterilized and unsterilized natural soil. Number of galls (nematode infection) on infected roots, was significantly increased with an increase in nematode inoculum density and significantly reduced by Glomus sp. whereas, mycorrhizal infection percentage was not significantly affected by M. incognita. Mycorrhizal infection percenage and number of galls were not affected by soil texture however, better growth of mycorrhizal plants was observed in silt than in clay soils. The results indicated that the use of Glomus sp. is a promising technique for agricultural production, and could be used as a biofertilizer and a biocontrol agent
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