Effect of time of staking on the development of anthracnose disease and yield of water yam (<i>Dioscorea alata</i>)

Nwankiti, A. O.

doi:10.1111/j.1744-7348.1984.tb03041.x

Cited by 2 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Under field situations, therefore, waterlogging could cause a mass flow of flood water into the leaf tissues carrying disease-causing soil-borne micro-organisms, particularly anthracnose caused by Glomerella spp. or Colletotrichum gloeosporioides (Onwueme, 1978;Nwankiti & Ahiara, 1983). Indeed Nwankiti & Ene (1984) reported that the attack of leaf anthracnose of water yam (D. aluta) started from the lower surface of the leaves in contact with the soil surface.…”

Section: Discussionmentioning

confidence: 99%

Effect of waterlogging yam vines on vegetative growth and tuber yield

Igwilo

Udeh

1987

Annals of Applied Biology

View full text Add to dashboard Cite

The effect of waterlogging the vines of two yam varieties for 24,48 and 72 hours at two stages of growth, with or without fertiliser application, was studied in the field.Waterlogging caused a progressive degeneration of the leaf starting with the development of fresh lesions on the lower leaf surface, through necrotic spots or portions, to complete leaf necrosis. The degree of leaf damage was greater with Um 680 (Dioscorea d a t a ) than with Obiaoturugo (D. rotundata). Waterlogging also caused the breakdown of the apical buds of the vines. The degree of damage increased with the duration of waterlogging. Younger plants suffered more damage than older plants, and plants treated with fertiliser suffered more than plants without fertiliser. Waterlogging ultimately hastened the final senescence of the yam vine.Waterlogging vines for 24 h had no effect on tuber yield, while waterlogging for 48 and 72 h reduced tuber yield by 32.4% and 43.2% respectively (P< 0.01).Waterlogging vines at the early growth stage produced 47.6% (P< 0.01) less yield than waterlogging at a later stage.It is suggested that short-term or long-term waterlogging of the yam vine, or parts thereof, is the main cause of reduced leaf area and low yield in unstaked compared with staked yam crops. Waterlogging may also be a predisposing factor to disease infection of yam vines by soil-borne micro-organisms.

show abstract

Section: Discussionmentioning

confidence: 99%

Effect of waterlogging yam vines on vegetative growth and tuber yield

Igwilo

Udeh

1987

Annals of Applied Biology

View full text Add to dashboard Cite

show abstract

“…Resistance breeding, regular fungicide usage where affordable and good cultural practices such as improved storage are management practices to combat yield losses in the field and in storage. Mineral nutrition for disease reduction in agricultural crops is regarded as cost effective management of crop loss compared to pesticide usage with environmental /health hazards [6]. Biofortification of crops through the application of mineral fertilizers combined…”

Section: Introductionmentioning

confidence: 99%

Mineral Fertilizer Effects on Anthracnose Disease Caused by Colletotrichum gloeosporioides Penz, Tuber Rot by Botryodiplodia theobromae Pat and yield in Dioscorea rotundata Variety Oniyere

2018

JOJHA

View full text Add to dashboard Cite

Mineral nutrition effect on anthracnose caused by Colletotrichum gloeosporioides, tuber rot by Botryodiplodia theobromae and yield in Dioscorea rotundata var. Iseosi was investigated in this study. The field plot used had been monoropped to Dioscorea species in the two previous consecutive years with only calcium nitrate fertilizer. But nitrogen and calcium in the plot soil were still below the critical (2% and 0.6 cmol kg -1 respectively) determined for optimum yam production (South West Nigeria). The field design was RCBD with 3 treatments of 0, 0.6, 1.2ml/l -1 Bounty fertilizer applied at 3 MAP, and three replicates. Bounty fertilizer favoured higher concentration of the phytoanticipins (with antimicrobial activity) flavonoid, lignin and tannin over the control. Leaf N and Mg had significant correlation with leaf flavonoid content (r = 0.7634, 0.6786). Leaf flavonoid had significant correlation with leaf lignin content, r = 0.7189. Leaf lignin in turn had significant correlation with leaf tannin content, r = 0.7556. Leaf Sulphur correlated significantly with leaf flavonoid and leaf phosphorus, r = 0.7218 and 0.8467 respectively. Bounty fertilizer also favoured higher leaf magnesium 234.73 and 230.27mg/100gdm (0.60ml/l -1 and 1.20ml/l -1 ) than the control, 182.40mg/100gdm. Leaf nitrogen, phosphorus and sulphur increased with bounty fertilizer treatment, then the control. Only leaf potassium was higher in the control (116.72mg/100gdm) than in the Bounty-fertilized plants with 87.31 and 87.53mg/100gdm in the 0.60mll -1 and 1.20mll -1 treatments.The following correlations were also significant respectively: Leaf N and Leaf P, S, r = 0.8484 and 0.9836 respectively.Leaf Ca and leaf Mg, r = 0.9192 Anthraconse incidence did not increase after the 3 MAP bounty fertilizer soil amendment. It was 11%, 6% and 0% in the control, 0.60ml/l -1 and 1.20ml/l -1 treatments respectively at 5 MAPS. It reduced to 5.6% (control and 0.60ml/l -1 treatment) and remained 0% in the 1.20ml/l -1 treatment at 6MAP. Severity of anthracnose was 1, category of resistant, both at 5 MAP and 6 MAPS across all the three treatments. The interplay/ enhancement of leaf minerals with the three phytochemicals/anticipants, as well as the latter with one another should be responsible for the low disease incidence and resistant severity status of variety Oniyere. Mean tuber weight loss after inoculation and incubation with B. theobromae for 2 weeks was 0% and infection range over the three treatments was low, that is 1.21 to 2.95% with no significant differences. Mean tuber weight per plant was in the range 0.88kg to 1.35kg with no significant differences between treatments. The 1.20ml/l -1 bounty fertilizer treatment gave equivalent yield of 13.46 tons ha -1 . Bounty fertilizer at 0.60ml/l -1 or 1.20ml/l -1 is recommended for local varieties of white guinea yam in South West Nigeria especially where monocropping is desired.

show abstract

Effect of time of staking on the development of anthracnose disease and yield of water yam (Dioscorea alata)

Cited by 2 publications

References 0 publications

Effect of waterlogging yam vines on vegetative growth and tuber yield

Effect of waterlogging yam vines on vegetative growth and tuber yield

Mineral Fertilizer Effects on Anthracnose Disease Caused by Colletotrichum gloeosporioides Penz, Tuber Rot by Botryodiplodia theobromae Pat and yield in Dioscorea rotundata Variety Oniyere

Contact Info

Product

Resources

About