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Abstract
The following points were conducted at the present study :
1-The influence of root-knot nematodes on tomato plants cultivars.
2-Determination of total antioxidants in certain tested plant extracts.
3-Biochemiacl analysis of certain plant extracts on activity of some oxidative enzymes.
4-Effect of salicylic acid (SA) and ascorbic acid (AA) as antioxidants on tomato plants infected with root-knot nematodes M.incognita.
5-Biochemical analysis of SA and AA on activity of some oxidative enzymes.