Evaluation of the allelopathic properties effect of two medicinal plant, Lallemantia royleana and Echinacea angustifolia extracts on germination and early seedling growth of Sinapis arvensis and Avena fatua

Some phytochemical compounds medicinal plants as allelopathic compounds added thephenomenainvolved, germination, growth and reproduction of other plants are affected Thatis whyin recent years the use of allelopathy in weed management has attracted the attention of manyexperts. To evaluate the effect of aqueous extract of Echinacea angustifolia and Lallemantia royleanaon seed germination and seedling growth indices of Sinapis arvensis and Avena fatua factorial experiment in a completely randomized design with 3 replications, in 2015 the Faculty of Agriculture in seed technology laboratory control done .The experiment consisted of two aqueous extract (Lallemantia royleana and Echinacea angustifolia) and two seed (Sinapis arvensis and Avena fatua) and fourecon centrations (control,5, 10and 20 percent). Germination percentage, germination rate, seedling length and seedling dry weight were determined.The results showed that the effect ofaqueous extract ofthe plant treated and different concentrations of aqueous extracts on the germination percentage , germination rate,seedling length and seedling dry weight was significantat thelevel ofone percent The results showed that all concentrations of aqueous extract of Lallemantia royleana to Echinacea angusti folia seed germination percentage and speed, seedling length and seedling dry weight Sinapis arvensis and Avena fatua have a deterrent effect, so thatby increasing the concentration of the extract, the inhibition rate increase the increase was greater for Sinapis arvensis to Avena fatua.