Etude de la dynamique de Bactrocera dorsalis (Hendel) (Diptera: Tephritidae) dans les vergers de mangues en Basse Casamance : influence des facteurs climatiques
| Autor: | Saliou Djiba, Seyni Sane, Kandioura Noba, Landing Diassi, Abdoulaye Baila Ndiaye, Ibrahima Solo Konta |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
education.field_of_study biology Fly control Ecology Population Forestry biology.organism_classification Positive correlation 010603 evolutionary biology 01 natural sciences Bactrocera dorsalis 010602 entomology chemistry.chemical_compound Methyl eugenol chemistry Tephritidae Dry season Host plants education Bactrocera dorsalis dynamique facteurs climatiques piégeage |
| Zdroj: | International Journal of Biological and Chemical Sciences; Vol 9, No 6 (2015); 2698-2715 |
| ISSN: | 1991-8631 1997-342X |
| Popis: | Au Senegal, la filiere mangue contribue a la lutte contre la pauvrete et l’insecurite alimentaire en milieu rural. Toutefois, elle est confrontee a des contraintes phytosanitaires notamment celles liees a Bactrocera dorsalis. La presente etude qui vise a comprendre la dynamique B. dorsalis a consiste a placer dans 4 vergers de manguiers, des pieges de type Sentrap contenant un diffuseur d’un attractif a base de methyl eugenol et une plaquette d’un insecticide, Dichlorvos et a relever et denombrer les captures. Les resultats montrent que B. dorsalis est presente a des degres differents dans les vergers etudies toute l’annee. Le nombre de mouches capturees est plus eleve en premiere annee de piegeage (1.547 individus en moyen) et faible en deuxieme annee (743 individus en moyen). Les captures de saison des pluies sont plus importantes que celles de saison seche. La charge en fruit des plantes-hotes et l’hygrometrie sont apparues comme deux facteurs majeurs influencant les fluctuations des populations de mouches. Une correlation positive est observee entre la dynamique, la temperature, l’hygrometrie et la pluviometrie mais negative entre la dynamique et le vent. Les periodes de faibles «densites» semblent etre les periodes les plus propices pour le controle des mouches. © 2015 International Formulae Group. All rights reserved. Mots cles : Bactrocera dorsalis , dynamique, facteurs climatiques, piegeage. Study of the dynamics of Bactrocera dorsalis (Hendel) (Diptera: Tephritidae) in mango orchards in Basse Casamance: influence of climatic factors In Senegal, the mango industry contributes to the fight against poverty and food insecurity in rural areas. However, it faces phytosanitary constraints including those related to Bactrocera dorsalis. This study, aimed at understanding the dynamics of B. dorsalis, was conducted in four mango orchards, using Sentrap type of traps, each containing an attractive (methyl eugenol) diffuser and insecticide (dichlorvos) plate. The catch of every trap is collected, sorted out and counted by specie. The results show that B. dorsalis is present, to varying degrees, in the studied orchards throughout the year. The number of flies captured is higher in the first year of trapping (1.547 flies in average) and low in the second year (743 individuals in average). The rainy season catches are larger than those of the dry season. The host plants fruit load and humidity appeared to be two major factors influencing the fluctuations in fly populations. A positive correlation was observed between the dynamics, temperature, humidity and rainfall. But a negative correlation was noted between fly population dynamics and wind. Periods of low "densities" seem to be the most favorable periods for fly control. © 2015 International Formulae Group. All rights reserved. Keywords : Bactrocera dorsalis , dynamic, climatic factors, trapping. |
| Databáze: | OpenAIRE |
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