Biological Control of Tomato Damping off Caused by Rhizoctonia solani under Plastic House Condition

Oadi N. Matny, Adnan A. Eisa

Abstract


The result of this study showed the activity of biological agent B. subtilis, K. marxianus, P. fluorescence in reducing the disease incidence of tomato seedlings underplastichouse conditions. The disease incidence was 5.5% for each of the preceding biocontrol agents, respectively, compared with pathogen treatment which was 27.7%. The biological agent showed the ability to increase plant growth parameters for tomato seedlings, the biological agents B. subtilis, S. cerevisiae, K. marxianus , P. fluorescence increased the dry root weight, and it was 0.2, 0.3, 0.2 and 0.3 g/plant respectively compared with pathogen treatment which was 0.1 g. The dry shoot weight was increased by B. subtilis, S. cerevisiae, P. fluorescence treatments and it was 1.06, 0.8 and 0.7 g/plant respectively compared to pathogen treatment which was 0.2 g. The total weight of tomato plants was increased by using the flowing biocontrol agents; B. subtilis, S. cerevisiae, P. fluorescence treatments and it was 1.27, 1.18 and 1.06 g/plant, respectively, compared with R. solani treatment which was 0.37g/plant.

Keywords


Biological Control, Tomato Damping off.

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