Aetiology of yam (Dioscorea rotundata) tuber rots held in traditional stores in Nigeria: Importance of Fusarium spp. and yam beetle

Acholo, Moses; Morse, Stephen; Macnamara, N.; Flegg, Lynda M.; Oliver, Richard P.

doi:10.1016/s0944-5013(97)80043-2

Cited by 7 publications

(4 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, attacks from a range of pests and diseases, including nematodes (Bridge 1982; Jatala & Bridge 1990; Adegbite et al 2006), continue throughout the cultivation, storage and marketing cycle. Indeed, losses during storage can exceed 0·4 (Acholo et al 1997; Morse et al 2000).…”

Section: Introductionmentioning

confidence: 99%

Potential for clean yam minisett production by resource-poor farmers in the middle-belt of Nigeria

Morse

McNamara²,

Acholo³

2009

J. Agric. Sci.

Self Cite

View full text Add to dashboard Cite

SummaryYam minisett technique (YMT) has been promoted throughout West Africa since the 1980s as a sustainable means of producing clean seed yam, but adoption of the technique is often reported as being patchy at best. While there has been much research on the factors which influence adoption of the technique there have been no attempts to assess its economic viability under 'farmer managed' as distinct from 'on station' conditions. This paper Results suggest that while chemical sett treatment increased yield and hence gross margin compared with woodash, but if household labour is costed then YMT is not economically viable. However, the specialist yam growers of Edeke were far more positive about the use of YMT as they tended to keep the yam seeds for planting rather than sell them. Thus great care needs to be taken with planning adoption surveys on the assumption that all farmers should adopt a technology.

show abstract

Section: Introductionmentioning

confidence: 99%

Potential for clean yam minisett production by resource-poor farmers in the middle-belt of Nigeria

Morse

McNamara²,

Acholo³

2009

J. Agric. Sci.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Surveys carried out in 1981, 1983 and 1984 in Coˆ te d'Ivoire showed increasing levels of infestation of stored yams over a period of 4 months of storage, with 63% of stored tubers being infested by moths and weight losses of 25% attributed to the insects (Sauphanor and Ratnadass 1985). Feeding damage by H. meles, P. caniculus and A. hartii allows fungal infections to develop in the tubers (Acholo et al 1997). Results have been revealed that tubers with cut surfaces are more prone to attack by Lepidoptera than those with unbroken epidermis, possibly because first-instar larvae are better able to penetrate the skin of the former (Iheagwam and Wojtusiak 1989).…”

Section: Yamsmentioning

confidence: 99%

“…A. hartii (Asiedu et al 2001), H. meles and H. appius (Tobih et al 2007) continue to be important insect pests of yam tubers in storage because of favourable temperatures and humidity in storage rooms. H. meles was reported to be the single largest cause of yam tuber rots (Acholo et al 1997). Storage facilities with poor ventilation favour heavy infestation by P. dioscoreae on newly emerged sprouts (Quin 1985).…”

Section: Yamsmentioning

confidence: 99%

Yield and Post-Harvest Pest Status of Some White Yam (Dioscorea rotundata Poir.) Landraces in Uyo Southeastern Nigeria

A .O,

C.Q,

N.U

2023

PSPC

View full text Add to dashboard Cite

Field experiment was conducted at National Cereals Research Institute (NCRI),Uyo out- Station in 2012 and 2013 to evaluated yield and post-harvest pest status of some yam landraces in Nigeria. The experiment was laid out in a randomized complete block design (RCBD), replicated thrice. Treatments were eight white yam landraces; Nwopoko, Obiotorugo, Offala, Hambakwashe, Aloshi, Udeanyi, Pepa and Eteme and one improved yam cultivar TDr 89/02665. Data obtained from yield and pest severity were subjected to analysis of variance. Result showed that Hambakwase produced significant tuber yield of 31.10 and 33.01 t/ha in 2012 and 2013, respectively. Obioturugo produced 28.18 and 28.02 t/ha, respectively. Eteme produced the least tuber yield of 16.23 and 15.33 t/ha. Udanyi had significant higher number of rotten tubers per plot at harvest; 2.41 and 2.08 in both years. At 3 months in storage, Offala had significant dry rot of 1.73 and 2.01, followed by 1.61 and 0.91 dry rot tubers per plot, recorded in Aloshi. Number of wet rot tubers per plot as influenced by white yam landraces at 3 months storage varied significantly different (p<0.05). Udanyi had significant higher number of wet tuber rot; 4.30 and 3.22 in 2012 and 2013. Presence of mealy bug infestation were seen Offala, Aloshi,Udanyi and Eteme in 2012. In 2013, Offala, Udanyi, Eteme and TDr 89/02665 had mealy bug infestation. .Among the yam landraces, scale insects were observed in the following; Obioturugo, Hambakwase and Udanyi in 2012 while in 2013, Obioturugo, Udanyi and Eteme had presence of scale insect in tubers at 3 months storage. This study therefore recommended Hambakwase and Nwopok for high tuber yield, less susceptible to rot, beetle and termite attack. Also, these promising yam landraces showed be incorporated into yam breeding programme in Nigeria.

show abstract

“…(Penicillium pinophilum, P. sclerotigenum, P. variabile) and Aspergillus spp. (Aspergillus flavus, A. japonicus, A. melleus, A. niger and A. terreus) (Acholo et al, 1997;Morse et al, 2000). Other fungal pathogens that have been found on yam include Botryodiplodia theobromae (Green & Simons, 1994;Noon, 1978), Cylindrocarpon spp., Acremonium spp., Cladosporium cladosporioides, Cunninghamella echinulata, Rhizopus oryzae, Scytladium lignicola, Cochliobolus verrucculosus, Cochliobolus hawaiiensi, and Paecilomyces variotii.…”

Section: Yam Pe S Ts and D Is E A S E Smentioning

confidence: 99%

The role of plant health in the sustainable production of seed yams in Nigeria: A challenging nexus between plant health, human food security, and culture

Morse

2021

Plant Pathology

View full text Add to dashboard Cite

Yam (Dioscorea rotundata Poir) is a root and tuber crop throughout West Africa and has significant nutritional, economic and cultural value which underpin its importance for the food security of many people who live there. The crop is propagated vegetatively, primarily via the planting of small whole tubers (seed yams) and pieces (setts) cut from larger tubers.However, the use of such vegetative material means that a variety of pests (primarily insects and nematodes) and diseases (primarily fungal and viral) can carry-over and multiply from season to season. This paper sets out the plant health issues associated with yam, and how these have been addressed by improving the availability of good quality planting material Accepted ArticleThis article is protected by copyright. All rights reserved especially via the Yam Minisett Technique (YMT) and the more recently developed Adapted Yam Minisett Technique (AYMT). Both approaches are based on the planting of 'minisetts' treated with pesticide to produce seed yam free of pests and fungal pathogens, but there have been challenges regarding their adoption by farmers. The paper explores these challenges and how these attempts to improve plant health fit into a wider discussion of the sustainability of yam production in West Africa given that there are other driving forces of climate change, globalisation and urbanisation at play in the region.

show abstract

Aetiology of yam (Dioscorea rotundata) tuber rots held in traditional stores in Nigeria: Importance of Fusarium spp. and yam beetle

Cited by 7 publications

References 8 publications

Potential for clean yam minisett production by resource-poor farmers in the middle-belt of Nigeria

Potential for clean yam minisett production by resource-poor farmers in the middle-belt of Nigeria

Yield and Post-Harvest Pest Status of Some White Yam (Dioscorea rotundata Poir.) Landraces in Uyo Southeastern Nigeria

The role of plant health in the sustainable production of seed yams in Nigeria: A challenging nexus between plant health, human food security, and culture

Contact Info

Product

Resources

About