Studies on the chemical control of rice blast caused by Piricularia oryzae Cav

Ashrafuzzaman, M.H.

Dissertation Abstracts B, The Sciences and Engineering 29(2): 435


ISSN/ISBN: 0420-073X
Accession: 014693118

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Of several fungicides evaluated for effectiveness against P. oryzae in laboratory trials Blasticidin-S (an antibiotic from Streptomyces griseochromogenes) and PMA were found to act systemically. In field trials, Blasticidin-S, PMA and fentin hydroxide increased yield of grain in a year of moderate disease attack. Recommended dosage rates (based on fungicidal effectiveness and phytotoxicity) were 40 ppm. for Blasticidin-S, 250 ppm. for fentin hydroxide and 80 ppm.