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.
