RESUMEQuelques aspects écologiques de la dynamique spatio-temporelle des populations d'Altises Podagrica spp. ont été étudiés dans les zones cotonnières de la Côte d'Ivoire, en suivant l'évolution des effectifs et des dégâts sur deux types de variétés de cotonniers (cotonnier glandless et cotonnier classique) et sur deux plantes hôtes (le gombo et le jute). Il ressort de ce travail que selon les localités, 3 à 6 générations se chevauchent durant la campagne agricole. Les fluctuations et les niveaux des infestations dépendent des facteurs climatologiques (pluviométrie, humidité relative, ETP, température), de la date de semis, de la taille et la localisation de la parcelle ainsi que de la disponibilité des plantes-hôtes. Sur la base de ces résultats, des méthodes culturales de lutte appropriées contre les Altises ont été recommandées : culture des variétés glandless sur de grandes superficies, exclusivement au nord du 9 e parallèle et destruction des cotonniers après la récolte ainsi que les plantes-hôtes. Mots clés :Cotonnier glandless, Altise, dynamique des populations, lutte culturale, Côte d'Ivoire. ABSTRACT SPATIAL AND SEASONAL PROFILES OF POPULATION DYNAMICS OF THE FLEA BEETLES podagrica spp. (coleoptera : chrysomelidae) : AGRONOMIC IMPLICATIONS IN THE COTTON PRODUCTION AREA IN CÔTE D'IVOIRESome ecological parameters of the population dynamics of the flea beetles Podagrica spp. were studied in the cotton growing area of Côte d'Ivoire. Population densities and damaged plants were scouted on two cotton varieties (glanded and glandless cotton) and two host plants (okra and jute). Data revealed, according to localities, that 3-6 overlapping generations of flea beetles occurred during the cotton growing season. Fluctuations and infestation levels depended on climatic factors (rainfall, relative humidity, ETP, temperature), cotton sowing dates, size and location of cotton fields, as well as on the presence of host plants. Based on these results, appropriate cultural methods to control flea beetles are recommended : cultivation of glandless cotton on large plots exclusively in the northern region above the 9 th parallel, destruction of cotton plants after harvest and the host plants.
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