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This investigation was conducted to study the allelopathic effects of Juglans regia (Walnut) leaf extract on seed germination and seedling growth of wheat (Triticum aestivum) and rye (Secale cereale). For this J. regia leaves extract was selected to analyze its allelopathic effects on seed germination and seedling growth of wheat and rye seeds. Applied seeds was treated with J. regia leaves extract using 2%, 4% and 6% concentrations. Different parameters i.e., seed germination, seedling growth, mortality percentage, fresh and dry weight of plumule and radicle was observed after the experiments. The higher seed germination percentage (50%) was recorded at 2% level, in both the applied seeds, which is followed by 4% in comparison to control. Almost higher concentration showed deleterious effects than the lower doses on germination percentage and seedling growth. The highest mortality percentage (70%) has been recorded at 4% level in wheat and 6% level in both wheat and rye seeds. Therefore, the results indicated that the growing weeds in high quantity between crops can affect the productivity rate of crops due to its allelopathic effects. The allelopathic compounds can be used as natural herbicides and other pesticides; they are less disruptive of the global ecosystem than are synthetic agrochemicals.

Allelopathic effects of Juglans regia leaf extract on seed germination and seedling growth of wheat (Triticum aestivum) and rye (Secale cereale)