ALLELOPATHIC EFFECT OF Guizotia scabra Sub Species Schimperi ON SEEDS GERMINATION AND EARLY SEEDLINGS GROWTH OF FABA BEAN (Vicia fabaL.)

Abstract

Guizotia scabra sub species schimperi is widely prevalent and commonly distributed type of weed in Faba beans, Cereals and other varieties of crops species. This research was designed to analyze the chemical composition of Guizotia scabra (schimperi) extracts and assess the allelopathic effects on the selected Dosha (coll-155/00-3) and Gora (EH91026-8-2XBPL44-1) Faba beans varieties. The experiment was designed in complete randomized with three replications. Extracts were prepared using Ethanol, Hexane and distilled Water as solvents from Leaves and Roots extracts in 5%, 10%, 15% and 20% concentration levels while distilled water was used as negative control. Data collected were on germination and early seedling growth of the two faba bean varieties. The obtained raw data were analyzed with one-way analysis of variance by using SPSS version 20. Results of analysis showed the presence of secondary metabolites Alkaloids, Terpenoids and Phenolicsfrom leaf and root extracts of Guizotia Scabra schimperi. The allelopathic effects results showed that all extracts were significantly p<0.05 inhibited seeds germination and seedling growth and the effect happened was the concentration level dependent. The allelopathic effects of the extracts were more pronounced on Gora Faba bean than Dosha Faba bean variety which is more tolerant to alellochemical effect. This showed that, the Dosha faba bean had better tolerance to allelochemicals of Guizotia scabra sub species schimperi extracts and more advisile by cultivars to grow it.