Comparison of fungicides for the control of Rhizoctonia solani causing datnping‐off of mung bean (Phaseohis aureus)

Abstract

SUMMARYOf 41 fungicides tested in the laboratory, copper carbonate, copper sulphate, mercuric chloride, Agrosan GN, quintozene, kasugamycin, carboxin, pyracar‐bolid, carbendazim, chloroneb, benomyl, Ohric, RH 893 (2‐n‐octyl‐4‐isothiazole‐3‐one) and Terrazole were most inhibitory to the mycelial growth of Rhizoctonia solani on Czapek's agar plates and had EC50 values of less than 1 μg a.i./ml, while copper oxychloride, Udonkor, zineb, ziram, F 319 (3‐hydroxy‐5‐methyl isoxazole) and anilazine were much less toxic, ziram being least inhibitory with an EC50 of 214 μg 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 mung bean 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.

Efeito de fungicidas e produtos alternativos no controle da antracnose e da pinta preta da goiaba

“…Uma maior eficiência do tebuconazol em relação aos fungicidas mancozebe e tiofanato-metílico, quanto à inibição do crescimento micelial e germinação dos conídios de C. acutatum do morango, foi relatada por Kososki et al (2001).…”

Variation in virulence to dry beans, soybeans and maize among isolates of Rhizoctonia solani from beans

“…The seedling stand was counted 14 days after sowing. Pre-emergence mortality was calculated for each host as described by Kataria & Grover (1978).…”

Use of three screening techniques for the evaluation of fungicides to control rhizoctonia root rot of wheat

“…solani on plants other than wheat have previously been controlled by many of the chemicals tested in this study. These include sheath blight of rice by tolclofos methyl (Hirooka, Miyagi & Araki, 1988) and propiconazole + benomyl (Taneja & Grover, 1982); sugar beet root rot by Bayer HWG 1608 (Ruppel & Hecker, 1987); blight of tall fescue by carboxin, triadimefon, iprodione and chlorothalonil ; damping off of mung bean by thiabendazole, benomyl and thiophanate methyl (Kataria & Grover, 1978) and root rot of cowpea by quintozene (Gangopadhyay & Grover, 1986). Crater disease of wheat (caused by R. solani) has been controlled in South Africa by a carboxin/tolclofos methyl combination at a rate of 200 kg a.i./ha (Smith & Wehner, 1987) and by copper oxychloride, fenarimol and benomyl at rates of 34, 38 and 25 kg a.i./ha, respectively (Smith, Wehner & Kotzi, 1984).…”