Evaluation of phytotoxic activity of Melia azedarach L. extracts on Lactuca sativa L.

摘要

Phytotoxic effects of aqueous and alcoholic extracts obtained from different parts (leaves, leaves & wood mix, fruits) of Melia azedarach L. on germination and growth of Lactuca sativa L. seeds were investigated under laboratory conditions. Ultrasonic and classic reflux methods were used for obtaining extracts from the vegetable material. The inhibitory effect on the germination of lettuce seeds as well as on seedling growth varied with concentration and extract type. Thus, fruit extract showed the most pronounced inhibitory effect followed by leaves extract and leaves and wood mix extract. The 5% w/v ethanolic extracts obtained by using reflux method showed a significant inhibitory effect on lettuce seeds germination and on seedlings.