الفهرس 
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Abstract
A survey of plant parasitic nematodes associated with vegetable crops at the selected four counties .i.e. Faraskour, Kafr-Saad, Zarqa and Kafr El-batikh of Damietta Governorate reveal the presence of eleven nematode genera i.e. Aphelenchoides, Hemicriconemoides, Hemicycliophora, Heterodera, Hirschmanniella, Hoplolaimus, Meloidogyne, Rotylenchulus, Scuttellonema, Tylenchorhynchus and Tylenchus. The nematode genera, Meloidogyne, Tylenchorhynchus and Hirschmanniella seemed to be the most prevailing nematode pests on some vegetable crops in Damietta Governorate as they occurred at the rates of 82, 69 and 54 times with an average of 25.7, 21.6 and 16.9% frequency occurrence, respectively.Regarding the impact of bio-fertilizer EM and dried powder of water hyacinth plant (Eichhornia crassipes) or turmeric plant (Curcuma longa) either or integrated applications on plant reaction of tomato seedlings cv. 888 F1 infected by M. incognita at greenhouse conditions, it is remarkable to detect that the experienced binary applications accomplished better results than single ones did. Evidently, data showed that all tested components enhanced tested plant criteria and also diminished nematode parameters. The bio-fertilizer EM application plus dry-leaf powder of water hyacinth plant mixed with oxamyl at triple doses each showed the maximum value of whole plant length (73.0%), whole plant fresh weights (231.8%), shoot dried weight (246.8%), leaves number (126.52%) and branches number (41.51%), respectively. In the meantime, the tetra application of (bio-fertilizer EM + turmeric + water hyacinth +oxamyl) accomplished the maximum decrease percentage in total nematode final density, galls and egg-masses number with values of 97.4, 86.5 and 91.5%, correspondingly.