The allelopathic effect of different species of grapevine berries aqueous extracts on some germination parameters of lettuce (Lactuca sativa L.) seeds.

Allelopathic potential of twelve local varieties of grapevine Vitis vinifera fruits: taefi; zareg-dohuok; Baetmuni; Blackmanga; Sarqala-bakrajo; Awelka; Rash-merii; Mala-Hassan; Ashgar-basraha; Kamalii; Toli-mawelian and Shekhnuraddin on some germination and growth parameters of lettuce seeds Lactuca sativa has been investigated . The aqueous extracts caused significant inhibitory effects on germination rate; germination speed; radical length; plumule length; radical, plumule and total seedlings dry weight. Bioassays indicated that the inhibitory effects were increased with increasing the aqueous extracts concentration. These results indicated that there is a considerable variation of allelopathic activity that could be utilized in the field of controlling weed plants.