Plant Protect. Sci., 2002, 38(11):645-647 | DOI: 10.17221/10580-PPS

Biological control of seedling damping-off and root rot of sugar beet plants

M.K. El-Kazzaz, M.M. Badr, H.M. El-Zahaby, M.I. Gouda
1 Department of Agricultural Botany, Faculty of Agriculture, Tanta University, Kafr El-Sheikh, Egypt
2 Plant Pathology Research Institute ARC, Giza, Egypt **E-mail: elkazzaz@agri-kafr.edu.eg

Some fungal and bacterial bioagents as well as an Actinomycete isolate were screened for their antagonistic effects against S. rolfsii, R. solani, M. phaseolina, F. oxysporum and F. solani in vitro. Trichoderma hamatum, T. harzianum, T. pseudokningii, certain isolates of Bacillus subtilis and one isolate of Pseudomonas fluorescens were the most effective bioagents in suppressing the radial growth of the four pathogens, in general. Yet, they were less effective in retarding growth of Fusarium spp. as compared with the other pathogens under study. Studying biological control showed the possibility of controlling sugar beet damping-off and root rot by certain bioagents as T. hamatum, T. hazianum, Pseudomonas fluorescens and B. subtilis under greenhouse (S. rolfsii-infested soil) and field (natural infection) conditions. These treatments also caused and increase root yield per plot.

Keywords: damping off; root rot; sugar beet; biocontrol

Published: December 31, 2002  Show citation

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El-Kazzaz MK, Badr MM, El-Zahaby HM, Gouda MI. Biological control of seedling damping-off and root rot of sugar beet plants. Plant Protect. Sci. 2002;38(SI 2 - 6th Conf EFPP):645-647. doi: 10.17221/10580-PPS.
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