Identification of biological components, damage and control alternatives for lepidopteran sugarcane stemborers in Panama
Atencio Valdespino R.. 2018. Montpellier : Université de Montpellier, 187 p.. Thèse de doctorat -- Mécanismes des interactions parasitaires pathogènes et symbiotiques.
Sugarcane (Saccharum officinarum) is grown in more than 100 countries worldwide with a total production averaging 170 million tons of sugar that has a profound economic impact on social and governmental issues. In terms of biological constraints there is a complex of diseases and pests that significantly reduce the productivity of sugarcane including stemborers. In Panama, the most important pests that cause losses in sugarcane are lepidopteran stemborers. The aim of this thesis was to study the bioecology of these major pests in Panama and to study different agricultural practices that influence stemborer infestations. To carry out this aim, our thesis has been divided into six overall objectives which constitute 8 different chapters. After presenting the general context (chapter 1), the first objective was to review the results obtained on integrated pest management strategies against the sugarcane borers Diatraea spp. (Lepidoptera: Crambidae), Elasmopalpus lignosellus (Zeller) (Lepidoptera: Pyralidae) and Telchinlicus (Drury) (Lepidoptera: Castniidae) in America that compiles 221 references from 1933 to 2017 (ch apter 2). The second objective was to identify the main sugarcane pest species of Diatraea spp. (Lepidoptera: Crambidae). This research used external morphology and genitalia by comparison with the well know species D. saccharalis and allowed to confirm Diatraea tabernella Dyar as the main stemborer species in Panama (chapter 3). The third objective was to determine the entomofauna associated with stemborers using different trapping systems. A cohort of arthropods was identified as pest species, predators and parasitoids (chapter 4). The fourth objective was to evaluate the use of sentinel prey of Galleria mellonella L. as a trapping technique to identify the key natural enemies that are able to regulate borer population (chapter 5). The experiment was carried out using G. mellonella eggs, larvae and pupae and the results showed that ants (Formicidae) wer
Mots-clés : saccharum officinarum; insecte déprédateur des tiges; gestion intégrée des ravageurs; diatraea; elasmopalpus lignosellus; diatraea saccharalis; lutte génétique; lutte culturale; panama; telchinlicus; diatraea centrella
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