Comparison of fungicides for the control of Rhizoctonia solani causing damping-off of mungbean (Phaseolus aureus)

Comparison of fungicides for the control of Rhizoctonia solani causing damping-off of mungbean (Phaseolus aureus)

1973

REP.MB-2321

Of 41 fungicides tested in the laboratory, copper carbonate, copper sulphate, mercuric chloride, Agrosan GN, quintozene, kasmicrogramamycin, carboxin, pyracarbolid, carbendazim, chloroneb, benomyl, Ohric, RH 893 (2-n-octyl-4-isothiazole-3-one) and Terrazole were the most inhibitory to the mycelial growth of Rhizoctonia solani on Czapek`s agar plates and EC50 values of less than 1 microgram a.i./ml, while copper oxychloride, Udonkor, zineb, ziram, F 319 (3-hydroxy-5-methyl isoxazole) and anilazine were much less toxic, ziram being the least inhibitory with an EC50 of 214 microgram a.i./ml. Of 17 fungicides tested in the greenhouse as seed treatments, thiabendazole, carbendazim, benomyl, thiophanate-methyl, dichlozoline and Ohric gave 80-90% control of damping-off of mungbean seedlings. A single soil drench with thiophanate-methyl and two drenches with benomyl gave about 90% disease control. More seedlings with R. solani infection survived when thiophanate-methyl was used as a post-inoculation soil drench than when benomyl or chloroneb were used. [AS]

v.88:257-263, ANNALS OF APPLIED BIOLOGY

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