The growth of the rice sheath rot fungus, Acrocylindrium oryzae was effectively inhibited by Benlate and Hinosan at 0,005 and 0.05 per cent respectively. Manob and Zineb were inhibitory only at higher concentrations. Quinalphos, an insecticide, inhibited the growth of the fungus at 0.4 per cent. The activity of cellulase was completely inhibited by quinalphos and moderately by Benlate and Hinosan. Moneb and Hinosan. were highly inhibitory to smylase activity. The activity of pectin trans eliminase was supressed by Hinosan while polygalacturonate trans eliminase activity was effectively. Inhibited by all the chemicals tested. Maneb and quinalphos were highly inhibitory to peroxidase activity.
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Tamil Nadu Agricultural University
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