Organic Farming

Quimio, Bermundo, Santiago, Villamor, Rosario, Martinez, and Manalo (BPRE) isolated 55 bacterial strains and 30 fungal isolates from healthy and diseased seed samples of corn and peanut planted in the provinces of Ilocos Norte, Ilocos Sur, Isabela, Nueva Ecija, Quirino, Pangasinan, Cagayan, Bukidnon, La Union and Agusan del Sur. These isolates were tested for their antagonistic activity against aflatoxin-forming A. flavus and seed rot fungi.

Fifteen of the corn bacterial isolates and 13 of the peanut isolates proved in co-cultivation test to be effective to 11 aflatoxin-forming A. flavus strains, 7 Fusarium strains, 2 strains each of Curvularia sp. and Penicillium sp., and 1 strain each of A. niger and Sclerotium sp.
Out of 28 antagonist isolates, only two, both from corn seeds produced volatile metabolites inhibitory to A. flavus.
Eight fungal isolates suppressed the growth of aflatoxin-forming A. flavus in the test of non-volatile antibiotic compounds.
Seven fungal test isolates were found effective in suppressing the growth of Macrophomina.
Eleven fungal isolates were observed to inhibit at least one pathogen in their test on volatile compounds.
Laboratory evaluation of metabolites and selection of ideal antagonist strain(s) for possible use in controlling aflatoxin-forming A flavus and other corn and peanut seed rot fungi are in progress.

Source: PCARRD, 1999. Highlights 1998, Los Banos, Laguna.

Today is May 17, 2006
	Bacterial and Fungal Antagonists as Sources of Natural Fungicidal Compounds for the Control of Seed Rot and Aflatoxin-forming Fungi in Corn and Peanut
	Quimio, Bermundo, Santiago, Villamor, Rosario, Martinez, and Manalo (BPRE) isolated 55 bacterial strains and 30 fungal isolates from healthy and diseased seed samples of corn and peanut planted in the provinces of Ilocos Norte, Ilocos Sur, Isabela, Nueva Ecija, Quirino, Pangasinan, Cagayan, Bukidnon, La Union and Agusan del Sur. These isolates were tested for their antagonistic activity against aflatoxin-forming A. flavus and seed rot fungi. Findings Fifteen of the corn bacterial isolates and 13 of the peanut isolates proved in co-cultivation test to be effective to 11 aflatoxin-forming A. flavus strains, 7 Fusarium strains, 2 strains each of Curvularia sp. and Penicillium sp., and 1 strain each of A. niger and Sclerotium sp. Out of 28 antagonist isolates, only two, both from corn seeds produced volatile metabolites inhibitory to A. flavus. Eight fungal isolates suppressed the growth of aflatoxin-forming A. flavus in the test of non-volatile antibiotic compounds. Seven fungal test isolates were found effective in suppressing the growth of Macrophomina. Eleven fungal isolates were observed to inhibit at least one pathogen in their test on volatile compounds. Laboratory evaluation of metabolites and selection of ideal antagonist strain(s) for possible use in controlling aflatoxin-forming A flavus and other corn and peanut seed rot fungi are in progress. Source: PCARRD, 1999. Highlights 1998, Los Banos, Laguna.
Home \| About Phil-Organic \| Market \| Technologies \| R&D \| Directory \| Policy \| Publications \| Regular programs and Services Organic Farming Information Network Philippine Council for Agriculture, Forestry and Natural Resources Research and Development (PCARRD) ©2006

Bacterial and Fungal Antagonists as Sources of Natural Fungicidal Compounds for the Control of Seed Rot and Aflatoxin-forming Fungi in Corn and Peanut