Détails de la publication

Effectiveness of neem seed oil (Azadirachta indica A. Juss: Meliaceae) on Syllepte derogata Fabricius, Lepidoptera: Pyralidae

Détails de la publication

• Type:Article
• Domaine: Production végétale - Génétique
• Année de publication: 2018
• Auteurs: GANDA H.; TOGBE E. C.; HOUNDETE T. A.; ZANNOU BOUKARI E. T.; GOGAN M.; DAGBENONBAKIN G. D.; KOSSOU D. K.
• Cultures: Neem
• Couverture géographique: Bénin
• Mots clés: Phyllophagous pest; integrated pest management; leaf-dipping method; larval immersion; Lethal Concentration; Benin

Résumé de la publication

Synthetic insecticides have long been used for cotton protection, resulting in pest resistance, toxicity and environmental pollution. Biopesticides have been suggested as alternatives to synthetic pesticides. Both field and laboratory experiments were conducted to evaluate the effectiveness of neem oil in controlling Syllepte derogata (Fabricius), a cotton phyllophagous pest. In the field trials, effect of neem oil was compared to that of conventional insecticides; while in the laboratory direct larval immersion and leaf dip method using EMA SUPER 56DC and neem oil were tested. Decrease in damage by S. derogata for about 63 and 86% was recorded with neem oil and synthetic insecticides. In the laboratory, the mortality of S. derogata after 24 hours exposure to neem oil and Ema Super was significantly higher (2.5 to 100%) than that of the control. The mortality of larvae of S. derogata was positively correlated with the concentration of neem oil and exposure time. Lethal Concentration (LC50) after 24 hours exposure of larvae was respectively 4.03 104 ml/l and 51.13 ml/l for leaf dipping method and larval immersion. Overall, these results showed the efficacy of neem oil in controlling S. derogata, as a biopesticide. This oil could also constitute a successful alternative to synthetic