Application of antagonistic microorganisms to control tree seed and seedling pathogens
Professorial Chair Lecture
UPLB Alumni Association Professorial chair Lecture
Place
College of Forestry and Natural Resources UP Los Banos, College, Laguna
Date
2021
Abstract
The antagonistic and pathogenic microorganisms were isolated from seeds and seedlings from the field and forest nurseries.
The dual or paired culture test indicated that some antagonistic isolates effectively suppressed the growth of pathogens by direct parasitism or by the production of toxic chemical.
The antagonistic fungi inoculated to seeds did not significantly reduce percent germination. Some isolates such as Trichoderma vine, Trichoderma hanicmum and Penicillum sp. increased germination as compared to the control. The antagonistic bacteria reduced germination of seeds except Bacillus subtilis with 65% and the control with 61.25% germination. .
The result on the effectiveness of antagonistic microorganisms to control seed-pathogens in the greenhouse test showed that out of the five (5) antagonistic microorganisms (3 fungi and 2 bacteria), Trichoderma harzianum was the most effective to control six (6) seed pathogens out of the eleven (11 ) tested as compared to the performance of fungicides, Captan and Benlate. Trichoderma aureoviride was the second most effective, although it did not control the four (4) pathogens, Fusarium solani, Fusarium semitectum, Pestalotia sp. and Rhizopus stolonifer.
The growth and development of the antagonistic fungi were favored by alternating light and dark conditions, acidic medium and a temperature ranging from 20 to 30°C.
Location
UPLB Main Library Special Collections Section
Call Number
Sp. Col.
Recommended citation
Militante, Ernesto P., "Application of antagonistic microorganisms to control tree seed and seedling pathogens" (2021). Professorial Chair Lecture. 101.
https://www.ukdr.uplb.edu.ph/professorial_lectures/101
Pages/Collation
24 leaves