Fungi associated with soft rot of yams (Dioscorea spp.) in storage in Nigeria

Ogundana, S.K.; Naqvi, S.H.Z.; Ekundayo, J. A.

doi:10.1016/s0007-1536(70)80159-0

Cited by 65 publications

(31 citation statements)

References 2 publications

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“…Fusarium species were also reportedly associated with dry rot in yam tubers in Nigeria (Ogundana et al, 1970;Morse et al, 2000) inducing pinkish with yellowish border on the infected tissues (IITA, 1993). The species of Fusarium implicated in dry tuber yam rot includes F. oxsporium, F. moniliforme and F. solani (Amusa and Baiyewu, 1999).…”

Section: Dry Rotmentioning

confidence: 99%

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Yam diseases and its management in Nigeria

Amusa¹,

Adegbite²,

Muhammed³

et al. 2003

Afr. J. Biotechnol.

114

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This review presents different diseases associated with yam and the management strategies employed in combating its menace in Nigeria. The field and storage diseases are presented, anthracnose is regarded as the most widely spread of all the field diseases, while yam mosaic virus disease is considered to cause the most severe losses in yams. Dry rot is considered as the most devastating of all the storage diseases of yam. Dry rot of yams alone causes a marked reduction in the quantity, marketable value and edible portions of tubers and those reductions are more severe in stored yams. The management strategies adopted and advocated for combating the field diseases includes the use of crop rotation, fallowing, planting of healthy material, the destruction of infected crop cultivars and the use of resistant cultivars. With regards to the storage diseases, the use of Tecto (Thiabendazole), locally made dry gins or wood ash before storage has been found to protect yam tubers against fungal infection in storage. Finally, processing of yam tubers into chips or cubes increases its shelf live for a period of between 6 months and one year.

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Section: Dry Rotmentioning

confidence: 99%

“…These include the use of crop rotation, fallowing and planting of healthy materials and the destruction of infected crop cultivars (Nwakiti, 1982;Nwakiti and Arene, 1976;Ogundana. et al, 1970).…”

Section: Yam Disease Managementmentioning

confidence: 99%

Yam diseases and its management in Nigeria

Amusa¹,

Adegbite²,

Muhammed³

et al. 2003

Afr. J. Biotechnol.

114

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“…Tissue macerating ability of isolates was determined on healthy freshly plucked mango fruits (M indica) at early stages of ripening and freshly picked African mango (I gabonensis) by the cork borer method of Ogundana et al 31 For each isolate, agar plugs of mycelial growth from 7-day-old PDA plate culture were inoculated into wells (0.6 Â 2.0 cm) made in the fruit mesocarp. Eight replicates were set up for each fruit type and each isolate.…”

Section: Determination Of Tissue Maceration Ability Of Isolatesmentioning

confidence: 99%

Pectinolytic and cellulolytic activities of heat resistant fungi and their macerating effects on mango and African mango

Ugwuanyi

Obeta

1999

J. Sci. Food Agric.

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“…The softness and wetness of infected tubers depend on the amount of moisture present in the environment of the tissues (2). Several other fungi have been associated with yam rots such as Aspergillus niger van Tiegh (1,24,25), Botryodiplodia theobromae (Pat) Griff et Maub (1,16,23), clopium (16) and P. gladioli Machacek (13). P. oxalicum appears to be the most frequently encountered of the fungi-causing rots of yam tubers.…”

Section: Introductionmentioning

confidence: 99%

Cell wall-degrading enzymes produced by Penicillium oxalicum Curie et Thom

Ikotun

1984

Mycopathologia

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Penicillium oxalicum Curie et Thom produced an exo-polygalacturonase, an endo-polygalacturonase and an endo-pectate lyase. It also produced cellulase Cx, cellobiase, B-glucosidase, xylanase, galactanase and arabinanase in culture and in infected yam tissues.The exo-polygalacturonase was unstable. It has a molecular weight of about 38 000 daltons. The endopolygalacturonase and endo-pectate lyase had an optimal pH of 5.0 and 8.5 and an isoelectric point (pI) at pH 3.6 and 4.9 respectively. Molecular weights of both enzymes were about 28 500 and 30 000 daltons respectively. The end products of the reaction were oligogalacturonides and revealed that cellulose was degraded to glucose, with cellobiose as an intermediate product. The end products of the degradation of hemicelluloses were xylose, galactose and arabinose.

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Fungi associated with soft rot of yams (Dioscorea spp.) in storage in Nigeria

Cited by 65 publications

References 2 publications

Yam diseases and its management in Nigeria

Yam diseases and its management in Nigeria

Pectinolytic and cellulolytic activities of heat resistant fungi and their macerating effects on mango and African mango

Cell wall-degrading enzymes produced by Penicillium oxalicum Curie et Thom

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