Vol. 5, Issue 5 (2017)
Biological control of tomato damping off caused by Pythium debaryanum
Author(s): M Rajendraprasad, B Vidyasagar, G Uma Devi and SR Koteswar Rao
Abstract: In vitro evaluation was conducted with twenty four isolates representing two different species Trichoderma harzianum and Trichoderma viride and twelve different Bacillus subtilis and Pseudomonas fluorescence. These potential biocontrol agents were tested for their efficacy against phytopathogenic fungi through dual culture technique.Therefore, these effective biocontrol agents can be used for greenhouse studies to confirm the feasibility of using in tomato damping off disease management. The combination of potential Trichoderma spp and Pseudomonas fluorescence bacterial biocontrol agents (T5 and T7 treatments) also proved effective in increasing germination and to reduce pre and post emergence damping off in the pots when inoculated with Pythium debaryanum. The lowest incidence (45.00 percent) of pre emergence damping off was recorded in T5 (seed treatment with Trichoderma harzianum -7 + soil application with Pseudomonas fluorescence-3). Among the bio-control treatments the lowest (47.92 and 52.08) post emergence damping off incidence was recorded in T5 (seed treatment with Trichoderma harzianum -7 + soil application with Pseudomonas fluorescence-3) at 30 and 50 DAS. The combination Trichoderma spp and Pseudomonas fluorescence bacterial biocontrol agents (T6 and T7) treatment also proved effective in increasing the shoot and root weight and fresh and dry weight of tomato plants when inoculated with Pythium debaryanum.
Pages: 447-452 | 917 Views 71 Downloads
download (4939KB)
How to cite this article:
M Rajendraprasad, B Vidyasagar, G Uma Devi, SR Koteswar Rao. Biological control of tomato damping off caused by Pythium debaryanum. Int J Chem Stud 2017;5(5):447-452.
