Performance de six cultivars de tomates Lycopersicon esculentum Mills. contre la jaunisse en cuillère des feuilles, le flétrissement bactérien et les nématodes à galles.
The objective of this study was to evaluate the antifungal potency of the essential oil of tea of savanna (Lippia multiflora) on three fungal strains. The essential oil is extracted of Lippia multiflora by steam distillation and the antifungal activity in vitro was investigated on Apergillus flavus, Asperguillus Niger and Fusarium sp species. This activity was realized by incorporation of the plant extract in Sabouraud medium prepared by a double dilution. The study revealed a sensitivity of these three species to the essential oil extracted from Lippia multiflora. It has been observed, in a descending order of sensitivity, a minimum fungicidal concentration (MFC) of 2.08 ± 0.58 µl / ml with Aspergillus flavus; 4.16 ± 1.17 µl / ml with Aspergillus Niger and 8.33 ± 2.35 µl / ml with Fusarium sp. The antifungal potency of the essential oil extracted from Lippia multiflora, allows considering its use as a novel approach in the field of integrated management of cereal stocks in post-harvest.
RESUMEL'enherbement est l'un des facteurs limitants des rendements agricoles au Nord de la Côte d'Ivoire. Dans le cadre de la recherche de solutions, la flore spontanée des jachères artificielles à Légumineuses arborescentes testées est comparée à celle des jachères naturelles. Les familles les plus représentées dans la flore adventice sont les Poaceae (30 % des espèces) et les Asteraceae (14 %). La régénération d'espèces arborescentes est plus abondante dans les jachères artificielles. Inversement, les espèces adventices sont numériquement plus importantes dans les jachères naturelles (76 % de la flore) que dans les jachères artificielles (59 %). Les jachères artificielles ont réduit l'abondance des mauvaises herbes d'environ 23 %.
Mots -clés :Flore adventice, rendements culturaux, jachères, légumineuses arborescentes, Côte d'Ivoire.
ABSTRACT
IMPACT OF FALLOWS ON WEEDS IN NORTHERN CÔTE D'
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