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Phytotoxic activity of the EO from Saudi and Egyptian ecotypes of C. procera on the (a) seed germination, (b) seedling shoot growth, and (c) seedling root growth of D. aegyptium. * p < 0.05, ** p < 0.01 (two-tailed t-test). Different letters per each line mean significant difference (one-way randomized blocks ANOVA). Data are mean value (n = 3) and the bars represent the standard error.
