Effect of soil fertility on host response to black leaf streak of plantain (<i>Musa</i>spp., AAB group) under traditional farming systems in Southeastern Nigeria

Mobambo, K.N.; Zuofa, K.; Gauhl, F.; Adeniji, M. O.; Pasberg‐Gauhl, C.

doi:10.1080/09670879409371858

Cited by 12 publications

(9 citation statements)

References 5 publications

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“…Deficiencies in Ca and P content predispose the plant to fungal and bacterial infection 35 . Black Sigatoka severity can be reduced if soil fertility and organic matter are high, such as in backyards that collect household refuse 36 .…”

Section: Resultsmentioning

confidence: 99%

“…Unpublished data from Mendez et al, mentioned by Romero 34 , reveal that N and K imbalances favor black Sigatoka development. Black Sigatoka severity can be reduced if soil fertility and organic matter are high, such as in backyards that collect household refuse 36 . Deficiencies in Ca and P content predispose the plant to fungal and bacterial infection 35 .…”

Section: Black Sigatoka Disease and Nutritional Status Under Field Comentioning

confidence: 99%

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Organic banana production in Ecuador: Its implications on black Sigatoka development and plant–soil nutritional status

Jiménez

Veken

Neirynck

et al. 2007

Renew. Agric. Food Syst.

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Black Sigatoka, caused by the leaf fungus Mycosphaerella fijiensis Morelet, is a major constraint to banana production around the world. In Ecuador, the biggest banana-exporting country in the world, this disease has become increasingly aggressive. This has resulted in more fungicide applications, which have significantly increased costs in production and for the environment. Consequently, many banana growers have shifted to organic production, which produces greater economic returns as a result of higher sale prices. In addition, production costs are lower as no fungicides are applied. These organic bananas receive substantial amounts of organic products. This study describes the black Sigatoka disease and nutrient status in an organic banana plantation and compares it with a conventionally fertilized and fungicide-treated plantation. Black Sigatoka symptoms were evaluated in the vegetative and flowering stages under both production conditions and in vitro conditions. Univariate and multivariate descriptive statistics were used to analyze the parameters. Disease symptoms were more severe in leaves from the organic field than in leaves from the inorganic field, but the nutrient status (soil and foliar) did not differ between the two farms. Banana plants from the organic farm had 12 functional leaves at flowering and eight functional leaves at harvest. Average banana yields were over 40% lower for organic versus inorganic management; however, the average price received for organic bananas was over two times higher. Profit-cost analysis has shown that the organic banana farm was substantially more profitable than the inorganic one during the time period analyzed. These results indicated that bananas can be grown commercially without fungicides, and the lower productivity levels are compensated by higher prices of organic fruits in international markets. In addition, organic production has beneficial impacts on social and environmental issues.

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Section: Resultsmentioning

confidence: 99%

Section: Black Sigatoka Disease and Nutritional Status Under Field Comentioning

confidence: 99%

Organic banana production in Ecuador: Its implications on black Sigatoka development and plant–soil nutritional status

Jiménez

Veken

Neirynck

et al. 2007

Renew. Agric. Food Syst.

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“…The higher the value of the index of non-spotted leaves, the healthier the leaves. Higher the number of standing (green) leaves and less leaf area with black sigatoka spots, the lower the black sigatoka severity on plantain (Mobambo et al, 1994). Severe cases of black sigatoka symptom may induce yield loss (up to 33-50% in West Africa) through a reduction of fruit per bunch and lower fruit weight by the defoliation of leaves and decreased functional leaf area (Mobambo et al, 1993).…”

Section: Relationship Between the Growth Parameters At Flowering And mentioning

confidence: 99%

Studies on Intra and Inter Correlative Responses of Phenological, Yield and Postharvest Traits in Some Plantain (<i> Musa</i> Spp.) Genotypes in Nigeria

Ndukwe¹,

Baiyeri²,

Muoneke³

et al. 2012

Agro-Science

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The correlative responses of pre-flowering growth traits of Musa species with the corresponding growth parameters at flowering, components of yield, fruit shelf life and pulp nutrient concentrations were performed. Data were generated from two field experiments conducted for two cropping cycles (2006-2008) in Onne, the high rainfall station of the International Institute of Tropical Agriculture (IITA). Results revealed that the number of days to flowering and harvest were highly negatively correlated with the pre-flowering growth traits. Total leaf area per plant at 3 and 6 months after planting (MAP) correlated positively with the number of hands with r-values of 0.682* and 0.661*, respectively. The correlation coefficients between the plant height and plant circumference at flowering and the number of hands were 0.969** and 0.982**, respectively in "PITA 14". Harvest index was strongly associated with the number of green leaves at flowering in "PITA 14" (r = 0.952**) and "30456-3" (r = 0.780*). The number of green leaves at flowering also had the strongest correlation with the index of non-spotted leaves (r = 0.957**) in "PITA 14". The concentration of phosphorus (P) and potassium (K) in the leaves at 3 MAP, however, had a positive association with the number of green leaves at flowering, fruit bulking period and the entire yield attributes. The leaf nitrogen (N) concentration at 6 MAP was also positively associated with number of days to shooting and maturity of fruits but negatively associated with fruit bulking period. All the growth, phenology and yield parameters had positive relationship with the leaf-3 N concentration at 6 MAP. The number of green leaves at flowering was strongly (r = 0.712**) related to the leaf-3 N concentration at 6 MAP. The P and K leaf concentrations at 3 MAP were positively correlated with the N and P pulp concentrations. The study showed that the pre-flowering traits, especially the number of green leaves could determine the yield, postharvest qualities and nutrient content of the pulp.

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“…Para lograr un control efectivo de la enfermedad, se deben optimizar todas las condiciones de crecimiento de las plantas (Gauhl, 1994). Asimismo, se ha determinado que la fertilidad del suelo tiene un efecto directo sobre la respuesta del plátano a la incidencia de Sigatoka negra (Mobambo et al, 1994a;Mobambo et al, 1994b). En Nigeria, las plantaciones de plátano (Musa AAB) cultivar Agbagba establecidas en suelos fértiles registraron menor daño que aquellas plantadas en suelos pobres.…”

Section: Prácticas De Cultivounclassified

Prácticas culturales para el manejo de la Sigatoka negra en bananos y plátanos

Orozco‐Santos¹,

Orozco-Romero²,

Pérez-Zamora³

et al. 2008

Trop. plant pathol.

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RESUMENEl control de la Sigatoka negra (Mycosphaerella fijiensis) se basa en el uso continuo de fungicidas y prácticas de cultivo. El control cultural reduce las fuentes de inóculo del patógeno y las condiciones favorables para su desarrollo, así como incrementa el vigor de las plantas. Para combatir la enfermedad se requiere conocer su comportamiento a través del tiempo, su relación con el clima y las prácticas de manejo. La práctica más importante para reducir la fuente de inóculo es la remoción de hojas afectadas o porciones de éstas. El tejido removido se deposita en el suelo y es factible la aplicación de urea para acelerar su descomposición. Una práctica alternativa es el "minicomposteo", que consiste en colocar la hojarasca y plantas cosechadas en pequeños montones para su rápida degradación, lo cual reduce el inóculo e incorpora nutrientes y materia orgánica al suelo. La poda temprana de las puntas de hojas jóvenes (antes de presentar lesiones esporuladas) y la eliminación rápida de plantas cosechadas disminuyen el inóculo. También, el manejo agronómico del cultivo como densidad de plantación, sistemas de drenaje, métodos de riego, control de malezas, fertilización química-biológica y control de nematodos, ayuda a reducir las condiciones favorables para el desarrollo de Sigatoka negra e incrementar el vigor de las plantas. Palabras clave: control cultural, Mycosphaerella fijiensis. ABSTRACT Cultural practices for the management of black sigatoka in bananas and plantainsBlack sigatoka (Mycosphaerella fijiensis) control consists in the continuous use of fungicide sprays and cultural practices. Cultural control reduces inoculum sources of the pathogen and favorable environmental conditions for its development, as well as it increases the vigor of the plants. In order to manage the disease it is necessary to know its behavior through the time, its relationship with the weather and the crop management. The most important cultural practice to reduce the inoculum source is the removal of the whole affected leaves or only the diseased portions of the leaves. The removed tissue is placed over the ground and the use of urea is feasible to accelerate its decomposition. An alternative practice is the "mini-composting" that consists in forming small heaps with the dead leaves and harvested plants for its quick degradation, which allows to reduce the pathogen inoculum and to incorporate nutrients and organic matters into the soil. The early pruning of the tips of the young leaves before they show symptoms of the disease and the quick elimination of harvested plants reduce the inoculum. Also, the agronomic management of the crop helps to reduce the favorable conditions and to increase the vigor of the plants: this management considers plantation density, drainage systems, irrigation methods, control of weeds, chemical-biological fertilization, and nematode control.

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Effect of soil fertility on host response to black leaf streak of plantain (Musaspp., AAB group) under traditional farming systems in Southeastern Nigeria

Cited by 12 publications

References 5 publications

Organic banana production in Ecuador: Its implications on black Sigatoka development and plant–soil nutritional status

Organic banana production in Ecuador: Its implications on black Sigatoka development and plant–soil nutritional status

Studies on Intra and Inter Correlative Responses of Phenological, Yield and Postharvest Traits in Some Plantain (<i> Musa</i> Spp.) Genotypes in Nigeria

Prácticas culturales para el manejo de la Sigatoka negra en bananos y plátanos

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