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EFFECT OF GLOMUS CALLOSUM, MELOIDOGYNE INCOGNITA AND SOIL MOISTURE ON GROWTH AND YIELD OF SUNFLOWER

M. JALALUDDIN¹, N.B. HAJRA², K. FIROZA³ AND F. SHAHINA³

Abstract: The effect of inoculating a VAM fungus (Glomus callosum) and root-knot nematode (Meloidogyne incognita) separately and combined before and 7 days after the inoculation of the each other were carried out in the rhizosphere regions of 10-days old sunflower seedlings growing in pots in which the water regime of the soil was maintained at 60% throughout till harvesting. The result showed that infestation by root-knot nematode was less when the VAM-fungus was inoculated 7 days before and infestation by the root-knot nematode was more when the VAM-fungus was inoculated 7 days after in combined inoculation experiments. A better growth and yield of sunflower was noticed when VAM-inocula was put in the rhizospheric regions 7 days before in the combined inoculation experiments. It was found that inoculation of VAM-fungus 7-days before can limit the infestation by root-knot nematode where the water regime in soil exceeds the requirement.

¹Department of Agriculture, University of Karachi, Karachi-75270, Pakistan

²Jinnah University for Women, 5-C, Nazimabad, Karachi, Pakistan

³National Nematological Research Centre, University of Karachi, Karachi-75270, Pakistan