Abstract:
This study was conducted under the laboratory condition at the Plant Pathology Laboratory of the Department of plant protection, college of agricultural studies, Sudan University of science and technology. Some experiments are conducted at the plant pathology laboratory, Shambat Research Station.
The aim of this experiment is to evaluate the effect of some plant aqueous extracts Roselle (Hibiscus subdariffa Linn) and the bark of Cinnamon (Cinnamomum verum) on the growth of the bacterium Xanthomonas citri pv.citri under laboratory conditions.
Different concentrations (25% , 12.5% and 6.25%) of each of the tested plants, in addition, to the Antibiotic, penamox (Amoxicillin 4%) were used and compared to the untreated control.
The results showed that the concentrations (25% and 12.5%) of the aqueous extracts of both tested plants in addition to antibiotic, penamox (Amoxicillin) recorded a high significant (P<0.05) inhibitory effect on the bacterial growth.
The isolated pathogen was proved to be a bacterium Xanthomonas citri pv.citri according to its properties morphological.
