Journal of Pure and Applied MicrobiologyVol. 8 No. Special Edition Nov. 2014

Evaluation of Tecoma stans and Callistemon viminalis Extracts against Potato Soft Rot Bacteria In vitro

Nader A. Ashmawy1, Said I. Behiry2, Hayssam M. Ali3,4* and Mohamed Z.M. Salem5

1Plant Pathology Department, Faculty of Agriculture (El-Shatby), Alexandria University, Alexandria, Egypt. 2Agricultural Botany Department, Faculty of Agriculture (Saba Basha), Alexandria University 3Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia. 4Timber Trees Research Department, Sabahia Horticulture Research Station, Horticulture Research Institute, Agriculture Research Center, Alexandria, Egypt. 5Forestry and Wood Technology Department, Faculty of Agriculture (EL-Shatby), Alexandria University, Egypt.

Received on 03 September 2014 and accepted on 28 October 2014



In the present study, the effect of leaves and branches extracts from Callistemon viminalis and Tecoma stans against the growth of some phytopathogenic potato soft rot bacteria namely; Dickeya chrysanthemi (DSM 4610), Pectobacterium carotovorum subsp. carotovorum (ipp038), Pectobacterium wasabiae (ipp041), Pectobacterium atrosepticum (1007) and Dickeya dianthicola (IPO 2114) were evaluated. T. stans leaves and branches extracts were masterly effective against the tested bacterial strains rather than the extracted ones from C. viminalis . Both of methanolic crude extract (MCE) and alkaloids (chloroform fraction) found in T. stans gave a good profiles of antibacterial activity. On the other hand, the most extracts of C. viminalis branches and other aqueous fraction extracts from C. viminalis and T. stans did not exhibit any activity against the growth of studied bacterial strains. Our pointed results could be considered T. stans extracts as bioagents against potato soft rot bacteria

Keywords : Extracts, Tecoma stans; Callistemon viminalis; phytopathogenic; potato soft rot bacteria.