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2004•Archives of Phytopathology and Plant ProtectionRequires access

Fungicide control ofStenocarpella Maydisin the Nigerian Savanna

P. S. Marley, Omowanle Oluwole Gbenga

Open publisher page 9 citations

Abstract

A survey of farmers' fields in the Savanna zone of Nigeria in 1999 indicated the presence of stalk and cob rots of maize at incidence rates of 15 – 43% and disease severity of 2.0 – 6.7. The causal organism was identified as Stenocarpella maydis ( = Diplodia maydis). S. maydis was found to reduce seed germination by up to 29.2%. Laboratory and screen house experiments were used to evaluate the efficacy of six seed treatment fungicides indicated that Luxan (a local fungicide of unknown composition), benomyl (Benlate) and mancozeb (Dithane M-45) were more effective than metalaxyl + carboxin + furathiocarp (Apron-plus), carbendazin + maneb (Delsene M) and tetramethylthiuram disulphide + hexachlorobenzene (thiram + HCB) in controlling S. maydis. Stalk rot severity increased with increasing fertilization rates.

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What this paper is about

A survey of farmers' fields in the Savanna zone of Nigeria in 1999 indicated the presence of stalk and cob rots of maize at incidence rates of 15 – 43% and disease severity of 2.0 – 6.7. The causal organism was identified as Stenocarpella maydis ( = Diplodia maydis). S. maydis was found to reduce seed germination by up to 29.2%. Laboratory and screen house experiments were used to evaluate the efficacy of six seed treatment fungicides indicated that Luxan (a local fungicide of unknown composition), benomyl (Benlate) and mancozeb (Dithane M-45) were more effective than metalaxyl + carboxin + furathiocarp (Apron-plus), carbendazin + maneb (Delsene M) and tetramethylthiuram disulphide + hexachlorobenzene (thiram + HCB) in controlling S. maydis. Stalk rot severity increased with increasing fertilization rates.

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Available abstract

A survey of farmers' fields in the Savanna zone of Nigeria in 1999 indicated the presence of stalk and cob rots of maize at incidence rates of 15 – 43% and disease severity of 2.0 – 6.7. The causal organism was identified as Stenocarpella maydis ( = Diplodia maydis). S. maydis was found to reduce seed germination by up to 29.2%. Laboratory and screen house experiments were used to evaluate the efficacy of six seed treatment fungicides indicated that Luxan (a local fungicide of unknown composition), benomyl (Benlate) and mancozeb (Dithane M-45) were more effective than metalaxyl + carboxin + furathiocarp (Apron-plus), carbendazin + maneb (Delsene M) and tetramethylthiuram disulphide + hexachlorobenzene (thiram + HCB) in controlling S. maydis. Stalk rot severity increased with increasing fertilization rates.

Key concepts: Fungicide, Mancozeb, Biology, Benomyl, Thiram, Captan, Metalaxyl, Maneb

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