title: Survival of Coelaenomenodera lameensis (Coleoptera: Chrysomelidae) in Relation to the Physical Characteristics of Different Oil Palm (Elaeis sp.) Breeding Populations.
abstract: The edibility of different Elaeis sp. breeding populations present in Benin was tested for the leaf miner Coelaenomenodera lameensis Berti (Coleoptera: Chrysomelidae), a major oil palm pest in Africa. Experiments carried out in sleeves revealed the oviposition capacities of females and the mortality rates for the different developmental stages by comparing the populations found on two breeding populations of Elaeis oleifera (HBK) Cortes, four of Elaeis guineensis Jacquin and four (E. guineensis × E. oleifera) × E. guineensis backcrosses. Females laid their eggs similarly on all breeding populations, with a preference for the E. guineensis La Mé origin. The average hatching rate reached 80% for the La Mé origin as opposed to 28% for the Deli origin. The mortality rates for the larval instars were greater on E. oleifera, on certain backcrosses and on the Deli origin of E. guineensis. Development at the second- and third- larval instars was the most affected, with a mortality rate of three to five times greater than that seen on La Mé. Epidermis and cuticle measurements indicated which breeding populations were suitable or unsuitable for the development of C. lameensis. E. guineensis, with its thin epidermis (12 µm) and cuticle (2 µm), proved to be highly susceptible to C. lameensis attacks. On the other hand, E. oleifera, which is very resistant, exhibited a thicker epidermis (17 µm) and cuticle (4 µm). The breeding populations were thus classified according to the positive or negative influence they exerted on the insect's egg laying and feeding.
authors.affiliation: CIRAD, UPR Bioagresseurs, F-34398, Montpellier, France laurence.ollivier@cirad.fr.
authors.forename: L
authors.initials: L
authors.lastname: Beaudoin-Ollivier
authors.affiliation: CIRAD, UPR Systèmes de Pérennes, F-34398, Montpellier, France.
authors.forename: A
authors.initials: A
authors.lastname: Flori
authors.affiliation: CRAPP, Institut National des Recherches Agricoles du Bénin, BP 01, Pobè, Benin.
authors.forename: A
authors.initials: A
authors.lastname: Coffi
authors.affiliation: CIRAD, UMR Amélioration Génétique et Adaptation des Plantes, F-34398, Montpellier, France.
authors.forename: D
authors.initials: D
authors.lastname: Cros
authors.affiliation: Laboratoire d'Entomologie Appliquée, Faculté des Sciences, Université de Lomé, Togo.
authors.forename: I
authors.initials: I
authors.lastname: Glitho
authors.affiliation: CRAPP, Institut National des Recherches Agricoles du Bénin, BP 01, Pobè, Benin.
authors.forename: L
authors.initials: L
authors.lastname: Nodichao
mesh_terms: D000818:Animals; D028023:Arecaceae / Q000033:anatomy & histology* / Q000235:genetics / Q000469:parasitology*; D001541:Benin; D001517:Coleoptera / Q000254:growth & development / Q000502:physiology*; D005260:Female; D006790:Host-Parasite Interactions; D007814:Larva / Q000254:growth & development / Q000502:physiology; D008297:Male; D009026:Mortality; D010058:Oviposition / Q000502:physiology; D018515:Plant Leaves / Q000033:anatomy & histology / Q000235:genetics / Q000469:parasitology
keywords: Coelaenomenodera lameensis; breeding population; comestibility; oil palm; population dynamics