• Aucun résultat trouvé

VARIOUS ENVIRONMENTAL FACTORS ALLOW TO OPTIMIZE THE EFFICACY OF BANANAS HYBRIDS RESISTANCE AGAINST BLACK LEAF STREAK DISEASE Catherine Abadie

N/A
N/A
Info
Télécharger
Protected

Academic year: 2021

Partager "VARIOUS ENVIRONMENTAL FACTORS ALLOW TO OPTIMIZE THE EFFICACY OF BANANAS HYBRIDS RESISTANCE AGAINST BLACK LEAF STREAK DISEASE Catherine Abadie"

Copied!
1
0
0

Chargement.... (Voir le texte intégral maintenant)

Texte intégral

(1)

VARIOUS ENVIRONMENTAL FACTORS ALLOW TO OPTIMIZE THE EFFICACY OF BANANAS HYBRIDS RESISTANCE AGAINST BLACK LEAF STREAK DISEASE Catherine Abadie1, Aurore Cavalier1, Clara Landry1, François Bonnot6, Luis Pérez Vicente2, Yanetsy Montero2, Domingo Rengifo3, Rosalba Rodriguez4, Luis Miniere4, Thierry Lescot5, Marie-Françoise Zapater6, Jean Carlier6

1 CIRAD UMR BGPI - Neufchâteau, 97130 Capesterre-Belle-Eau - Guadeloupe 2 INISAV - Calle 110 #514eL/5a. Havana CP 11600 - Cuba

3 IDIAF - Calle Rafael A. Sánchez #89, Santo Domingo - Dominican Republic 4 SEA - Autopista Duarte, Km. 6½, Santo Domingo - Dominican Republic 5 CIRAD - UPR 26 - Avenue Agropolis, 34398 Montpellier- France.

6 CIRAD – UMR BGPI – Baillarguet, TA 54K, 34398 Montpellier- France

Black leaf streak disease (BLSD) is the most destructive leaf disease of bananas. The cultivation of resistant varieties appears as the most appropriate control. We aim to optimize the efficacy of hybrids resistance at plant, plot and regional scales. Two different approaches have been carried out : (i) a modelling approach to identify the most efficient resistance components (plant scale) and regional spatial arrangements (varieties mixture) in the disease control ; (ii) an epidemiological survey carried out at national scale in Cuba and Dominican Republic to understand the effect of three environmental (climatic, agronomical, edaphic) factors on the efficacy of the bananas hybrids resistance against BLSD. The BLSD simulations showed the efficacy of two main resistance components (infection efficacy and lesions growth) in the disease control at plant scale.

The low level of BLSD resistance efficacy of bananas hybrids in Dominican Republic and Cuba can be explained by rainfalls, cultural practices (plantation densities, irrigation, weeds control) and edaphic factors (N, Mg, P). The BLSD hybrids resistance efficacy to BLSD can be modulated with climatic conditions and agronomical practices at plot scales.

The role of any environmental factor on disease severity on resistant hybrids at plant, plot and regional scales are discussed.

Références

Télécharger maintenant ( PDF - 1 Page - 53.92 KB )

Documents relatifs

An imaging approach to identify mechanisms of resistance to pineapple fruitlet core rot

In this study, (i) we focused on the anatomy of the fruitlets in the resistant “MD-2” and susceptible “Queen” pineapple cultivars; (ii) we identified the key role of the

Resistance performance of new bananas hybrids and impact of fertilization effect on Black leaf streak disease severity

Pb-2006) was evaluated in Cuba in 2 contrasted environmental conditions (at Sto Domingo, central province, at Guira de Melena, western) and in Dominican Republic in one location

Adaptation of the forecasting system to control Black Leaf Streak Disease of banana in the specific conditions of Dominican Republic

Discussion and perspectives Our study carried out in three very different sets of conditions at the farm level allows demonstrating that it is possible to adapt the forecasting

Management of an important fungal aerial disease of bananas (Black Leaf Streak Disease) without chemical control

The design of cropping systems excluding the use of fungicides requires an innovative agro-ecological approach mixing cultural practices aiming to slow down the

Impact of the extension of black leaf streak disease on banana susceptibility to post-harvest diseases

For both locations, the effect of the different treatments on leaf spot severity (BLSDS, SDS), on the number of functional leaves (NFL) and on the youngest leaf spotted (YLS)

Simulation model to assess the efficacy of host partial resistance: case of black leaf streak disease on banana

• The aims of this study are to propose a simulation model of banana/M.fijiensis pathosystem at plant scale, to evaluate the impact of partial resistance components on the

Combined genetic and genomic approaches to characterize a durable Hevea resistance to South American leaf blight : S01T07

Genetic mapping revealed unexpected genetic determinisms underlying the observed resistances: whereas a complex genetic determinism implying major resistance genes and

Evaluation of host partial resistance efficacy to a foliar disease using a simulation modeling approach : case of Mycosphaerella leaf spots diseases of banana

Evaluation of host partial resistance efficacy to a foliar disease using a simulation modeling approach : case of Mycosphaerella leaf spots diseases of