Increasing distribution and damage to palms by the Neotropical whitefly, Aleurotrachelus atratus (Hemiptera: Aleyrodidae)

Borowiec Nicolas, Quilici Serge, Martin J., Issimaila M.A., Chadhouliati A.C., Youssoufa M.A, Beaudoin-Ollivier Laurence, Delvare Gérard, Reynaud Bernard. 2010. Increasing distribution and damage to palms by the Neotropical whitefly, Aleurotrachelus atratus (Hemiptera: Aleyrodidae). Journal of Applied Entomology, 134 (6) : 498-510.

Quartile : Q2, Sujet : ENTOMOLOGY

Résumé : In recent years, the coconut whitefly, Aleurotrachelus atratus Hempel, has been recorded from various islands in the southwestern Indian Ocean. Field surveys in La Re´union, the Seychelles, the Comoros and glasshouses in Paris have allowed us to record this whitefly on 56 palm species, some of which are endemic and/or threatened species. Most of trees showed low infestation levels, except for the coconut palm that is its main host plant. Such a wide host range has facilitated the rapid geographical dissemination of this whitefly. A field study was conducted in 2006 in La Re´union, to gain a better understanding of the bioecology of A. atratus in a tropical insular ecosystem. The whitefly was found throughout the island, from sea level to 800-m altitude. Five parasitoid species (Hymenoptera: Aphelinidae) were found associated with the populations of this pest, with Eretmocerus cocois Delvare being the dominant one. A laboratory study showed that the pre-imaginal development of A. atratus is around 48 days at 25-27_C, which is relatively long compared to other whitefly species. With a sex ratio of one male per 1022 females collected in La Re´union, it appears that the whitefly reproduces by thelytoky. It represents a threat to ornamental and agricultural palms as well as to natural palm ecosystems in the absence of effective parasitoids.

Mots-clés Agrovoc : Aleyrodidae, Aphelinidae, Araceae, Elaeis guineensis, cycle de développement, plante hôte, distribution géographique, relation hôte parasite

Mots-clés géographiques Agrovoc : Comores, Seychelles, La Réunion, France

Mots-clés complémentaires : Aleurotrachelus atratus

Classification Agris : H10 - Ravageurs des plantes

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

• Borowiec Nicolas, Université de la Réunion (REU)
• Quilici Serge, CIRAD-BIOS-UMR PVBMT (REU)
• Martin J., Natural History Museum (GBR)
• Issimaila M.A., INRAPE (COM)
• Chadhouliati A.C., INRAPE (COM)
• Youssoufa M.A, INRAPE (COM)
• Beaudoin-Ollivier Laurence, CIRAD-BIOS-UPR Bioagresseurs de pérennes (FRA) ORCID: 0000-0003-4838-8318
• Delvare Gérard, CIRAD-BIOS-UMR CBGP (FRA)
• Reynaud Bernard, CIRAD-BIOS-UMR PVBMT (REU) ORCID: 0009-0003-6403-3944

Source : Cirad - Agritrop (https://agritrop.cirad.fr/555572/)

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