Philippine Science Letters
vol. 6 | no. 1 | 2013
published online May 17, 2013


Effect of organic matter amendment on the rhizosphere microbial community and root-infecting pathogens of aerobic rice variety Apo

by Charina Gracia B. Banaay1*, Casiana M. Vera Cruz2, and Virginia C. Cuevas1

1 Institute of Biological Sciences, College of Arts and Sciences, University of the Philippines Los Baños, Laguna, Philippines
2 International Rice Research Institute, Los Baños, Laguna, Philippines



The effect of organic matter (OM) amendment on Meloidogyne graminicola and Pythium sp. infection of aerobic rice was determined in field experiments conducted during the 2009–2010 dry seasons. OM was added as in situ-composted rice straw. M. graminicola occurrence was unaffected but percent root galling was reduced. Pythium occurrence was lower in treated than in control plots. Microbial diversity was higher in treated plots during active plant growth. This increase in microbial diversity correlated with the observed decrease in disease symptoms. OM amendment is proposed as an alternative way of managing M. graminicola and Pythium infection in aerobic rice fields.

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Submitted: September 16, 2012
Revised: April 8, 2013
Accepted: April 14, 2013
Published: May 17, 2013
Eduardo A. Padlan and Gisela P. Padilla - Concepcion
Rhodora R. Aldemita
Glenn Gregorio