Season and plant age effect evaluation of plantain for response to black sigatoka disease

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

doi:10.1016/0261-2194(95)00144-1

Cited by 22 publications

(17 citation statements)

References 4 publications

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“…Under very favorable conditions in Costa Rica and with a susceptible host, incubation periods of M. fijiensis can be as short as 13 to 14 days, whereas during periods of unfavorable weather, the duration of the incubation period can extend up to 35 days (Marín et al, 2003). Similar reports exist for Nigeria on plantains (Mobambo et al, 1996). During the rainy season, the incubation period was 14 days but in the dry season 24 days.…”

Section: Resultssupporting

confidence: 80%

Worldwide geographical distribution of Black Sigatoka for banana: predictions based on climate change models

Júnior¹,

Júnior²,

Cecílio³

et al. 2008

Sci. agric. (Piracicaba, Braz.)

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Global climatic changes will potentially influence plant diseases and the efficacy of their management options. One of the most likely impacts of climate change will be felt by the geographical distribution of plant diseases. Black Sigatoka is considered the most damaging and costly disease of banana. The socio-economic impact of this disease has continued to increase as the pathogen reaches new areas and the disease becomes more difficult to be controled. The objectives of this research were to compare the global geographical distribution of the disease based on maps elaborated using weather data representing: i) current and future periods (2020, 2050 and 2080), ii) Intergovernmental Panel on Climate Change scenarios A2 and B2, iii) predictions based on six different climate change models and the "multimodel ensemble" and, iv) individual months. The "multimodel ensemble" lead to a reduction in the variability of the simulations when compared to the results obtained using the individual models separately. The predictions suggested that, in the future, areas favorable for the development of the Black Sigatoka disease will decrease. This reduction will occur gradually and will be higher for the A2 than for the B2 scenario. Changes in the geographical distribution of the disease will occur from one month to another, with unfavorable areas becoming favorable and vice-versa. However, in spite of these changes, extensive areas will still continue to be favorable for the occurrence of Black Sigatoka.

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Section: Resultssupporting

confidence: 80%

Worldwide geographical distribution of Black Sigatoka for banana: predictions based on climate change models

Júnior¹,

Júnior²,

Cecílio³

et al. 2008

Sci. agric. (Piracicaba, Braz.)

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“…Elle semble évoluer selon un caractère saisonnier atteignant ses plus fortes valeurs en saison sèche. Cette évolution lente de la maladie en saison sèche est en accord avec les résultats obtenus au Nigeria [14].…”

Section: Nombre De Feuilles Vivantes Et Rang De La Plus Jeune Feuilleunclassified

Déterminants de la production de plantain dans le sud-ouest du Cameroun : intérêt d'un observatoire

Pierrot¹,

Achard²,

Temple³

et al. 2002

Fruits

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-Introduction. Plantain is an important crop for food safety in sub-Saharan Africa. In order to treat the research priorities better on a hierarchical basis according to the producer constraints, a permanent observation unit was placed within the framework of an interdisciplinary approach. Materials and methods. A sampling in banana plantations was carried out in the zones of distinct agroecologic contexts which supply Douala (Cameroon). The data were obtained by a follow-up of parcels and holdings. On the parcel scale, observations related to the cultivation methods, the nematode and weevil populations, and the yields. On the holding scale, the follow-ups related to the economic functions of the plantain. Results and discussions. The range of studied farming situations corresponds to a diversity of holding context and objectives. The observations carried out on banana plants (foliar emission rhythm, pseudostem circumference, number of fingers and live leaves, finger weight and length, bunch weight) made it possible to explain how the yield was determined. This is especially affected by the losses before harvest, in relation to the sanitary state of the roots and the nematode and weevil presence. These losses were maximum at the end of the dry season. The yield is also related to the bunch weight determined by the finger number and grade. For this last, the results obtained clearly do not underline the incidence of the black Sigatoka disease. Improvements of the protocol of follow-up are proposed. Musa (plantains) / Cameroon / surveying / yield components / fungal diseases / parasitismDéterminants de la production de plantain dans le sud-ouest du Cameroun : intérêt d'un observatoire.Résumé -Introduction. Le plantain est une culture importante pour la sécurité alimentaire en Afrique sub-saharienne. Pour mieux hiérarchiser les priorités de recherche en fonction des contraintes des producteurs, une cellule d'observation permanente a été mise en place dans le cadre d'une démarche interdisciplinaire. Matériel et méthodes. Un échantillonnage en bananeraies a couvert les zones de contextes agroécologiques distincts qui approvisionnent Douala. Les données ont été obtenues par un suivi de parcelles et d'exploitations. À l'échelle des parcelles, les observations ont porté sur les pratiques culturales, les populations de néma-todes et de charançons, et les rendements. À l'échelle des exploitations, les suivis ont porté sur les fonctions économiques du plantain. Résultats et discussions. La gamme de situations culturales étudiées correspond à une diversité de contextes et d'objectifs des exploitations agricoles. Les observations effectuées sur bananiers (rythme d'émission foliaire, circonférence du pseudotronc, nombre de doigts et de feuilles vivantes, poids et longueur des doigts, poids du régime) ont permis d'expliquer comment se déterminait le rendement. Celui-ci est surtout affecté par les pertes avant récolte, en relation avec l'état sanitaire des racines et la présence de nématodes et de charançons. Ces perte...

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“…BLSD can induce necrotic lesions on the leaves with a range of one to six infection stages described by Fouré . This disease may reduce photosynthetic activity, resulting in banana fruit losses of up to 50%, and may also cause premature ripening of the fruit, rendering them unsuitable for commercialization …”

Section: Introductionmentioning

confidence: 99%

“…Other authors have studied biological efficacy in the field by measuring the evolution of pest populations or plant tissue damage . Measurements of the effectiveness of fungicide applications for disease control are often carried out in the field with natural infestations . Evaluations are usually based on visual observations, which are onerous and time‐consuming requiring several spray applications and disease observations during the whole cropping cycle up to harvest, typically 8–10 months for a banana crop .…”

Section: Introductionmentioning

confidence: 99%

Development of a rapid methodology for biological efficacy assessment in banana plantations: application to reduced dosages of contact fungicide for Black Leaf Streak Disease (BLSD) control

Bakache

Douzals

Bonicelli

et al. 2018

Pest Management Science

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BACKGROUND Black sigatoka is the main disease of banana crop production and is controlled by using either systemic or contact fungicides through spray applications. Biological efficacy is typically assessed on a whole cropping cycle with a natural infestation and periodic spray applications. Developing a faster methodology for assessment of the biological efficacy of a contact fungicide offers promising perspectives for testing current and new fungicides or application techniques. RESULTS The methodology is based on the time of occurrence of the first BLSD symptoms. An artificial infestation protocol was optimized by multiplying the infestation spots and by covering the infested plants. Biological efficacy tests were based on a single spray application after infestation combining three mancozeb dose reductions and two nozzle types. Results demonstrated that a 50% reduction in the mancozeb rated dosage gave significant efficacy independently of the nozzle type, with a reduction of the number of lesions of up to 55% compared with control plants. CONCLUSIONS The described method provides rapid and significant infestation. Further comparison of spray settings and fungicide doses was possible. This methodology will be tested at the plantation scale over a longer period covering the whole crop cycle. © 2018 Society of Chemical Industry

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Season and plant age effect evaluation of plantain for response to black sigatoka disease

Cited by 22 publications

References 4 publications

Worldwide geographical distribution of Black Sigatoka for banana: predictions based on climate change models

Worldwide geographical distribution of Black Sigatoka for banana: predictions based on climate change models

Déterminants de la production de plantain dans le sud-ouest du Cameroun : intérêt d'un observatoire

Development of a rapid methodology for biological efficacy assessment in banana plantations: application to reduced dosages of contact fungicide for Black Leaf Streak Disease (BLSD) control

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