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http://dx.doi.org/10.5423/RPD.2002.8.4.234

Biological control of Pythium damping-off of cucumber by Bacillus stearothermophilus YC4194  

Yang, Hyun-Sook (경상대학교 응용생명과학부 미생물학전공(BK21), 기초과학연구소)
Sohn, Hwang-Bae (경상대학교 응용생명과학부 미생물학전공(BK21), 기초과학연구소)
Chung, Young-Ryun (경상대학교 응용생명과학부 미생물학전공(BK21), 기초과학연구소)
Publication Information
Research in Plant Disease / v.8, no.4, 2002 , pp. 234-238 More about this Journal
Abstract
In vitro and in vivo activities of a biocontrol agent, Bacillus stearothermophilus strain YC4194 was evaluated for the control of Pythium damping-off of cucumber. B. stearothermophilus YC4194 inhibited germination of cystospores and formation of zoosporangia of Pythium aphanidermatum in vitro. Incorporation of a bentonite and talc based formulation(10$^{9}$ cfu/g) of B. stearothermophilus YC4194 to the nursery soils (10 g/ι soil) resulted In a significant (p=0.01) reduction in the disease severity of cucumber damping-off after inoculation with P. aphanidermatum. The control efficacy of B. stearothermophilus YC4194 formulation was not different from that of the fungicides, dimethomorph, metalaxyl, ethaboxam. When the cucumber plants were transplanted to the soil inoculated with P. aphanidermatum zoospores, the B. stearothermophilus YC4194 maintained the high population density in rhizosphere soil upto 10$^{7}$ cfu/g until 15 days after treatment.
Keywords
Pythium; Biological control; Inhibition of zoosporangia and cystospores germination;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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