World Journal of Agricultural Research
ISSN (Print): 2333-0643 ISSN (Online): 2333-0678 Website: Editor-in-chief: Rener Luciano de Souza Ferraz
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World Journal of Agricultural Research. 2015, 3(1), 11-16
DOI: 10.12691/wjar-3-1-3
Open AccessArticle

Isolation, Screening and Characterization of Effective Microbes with Potential for Biological Control of Fusarium wilt of Rock Melon

Salha Elmahdi1, Jugah Kadir1, , Mahmud Tengku Muda Mohamed2, Ganesan Vadamalai1 and Shamima Akter1

1Department of Plant Protection, Faculty of Agriculture, Universiti Putra Malaysia, Serdang, Selangor Darul Ehsan, Malaysia

2Department of Crop Science, Faculty of Agriculture, Universiti Putra Malaysia, Serdang, Selangor Darul Ehsan, Malaysia

Pub. Date: January 20, 2015

Cite this paper:
Salha Elmahdi, Jugah Kadir, Mahmud Tengku Muda Mohamed, Ganesan Vadamalai and Shamima Akter. Isolation, Screening and Characterization of Effective Microbes with Potential for Biological Control of Fusarium wilt of Rock Melon. World Journal of Agricultural Research. 2015; 3(1):11-16. doi: 10.12691/wjar-3-1-3


Effective microbes are a group of microorganisms that can be found in the rhizosphere, in association with plant roots which can suppress soil-borne plant pathogens directly or indirectly. A large number of bacteria including species of Alcaligenes, Arthrobacter, Bacillus, Pseudomonas, Rhizobium and Serratia have been reported to suppress the soil borne plant pathogens. In this study, Fusarium wilt symptomless Rock melon rhizospheric soil samples were collected from three locations (Malaysia). A total of seventy two effective bacteria were isolated by the dilution method. These isolates were firstly dually cultured in vitro on PDA medium with F. oxysporum f.s. melonis, the causal agent of Fusarium wilt of Rock melon. Isolates with inhibitory characteristics against the test fungus were selected for further screening by means of extracellular metabolite test. Seven isolates which showed >60% inhibition of the fungal growth was further identified on the basis of colony morphology, biochemical tests and Biolog® System. These isolates were identified as Pseudomonas sp., Bacillus sp., Serratia sp., only one isolate could not be identified. MKB04 and MKB10 gave the best suppression of Fom mycelial growth. Further molecular identification of these two isolates identified them as Bacillus amyloliquefaciens, and Alcaligenes faecalis respectively. Effective microbes are environmental friendly and in vitro antagonistic activities they manifested against F. oxysporium f. s. melonis in this study suggest that they can be used as an effective biological control agent.

biological control effective microbes (EM) fusarium wilt rock melon

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