Effect of biological activity of Carapa procera seed oil on the tomato leaf miner, Tuta absoluta

Konan Kouassi Arthur Jocelin, N'cho Anthelme J., Kouadio Marie-France N., Gadji Gabaze A., Coulibaly Noupe, Ouali N'Goran S-W. Mauricette, Martin Thibaud. 2023. Effect of biological activity of Carapa procera seed oil on the tomato leaf miner, Tuta absoluta. Journal of Plant Diseases and Protection, 130 : 1281-1292.

Résumé : Tuta absoluta poses a serious threat to tomato production worldwide as it can cause important yield losses. Its control is currently mainly based on the use of synthetic chemical insecticides, which unfortunately selects resistant populations and entails public health risks. The aim of this study was to evaluate the insecticidal, repellent and sublethal effects of Carapa procera seed oil on all stages of T. absoluta. Larvicidal (by contact and by ingestion), ovicidal and anti-feeding effects were evaluated by testing 1.5%, 3%, 4.5%, 6% and 7.5% concentrations of oil. Larvicidal and ovicidal effects were tested by direct application of Carapa solutions on larvae and eggs but also by feeding the larvae leaves dipped in solutions. The adult repellent effect was investigated by identifying the preferred area on filter paper partly non-treated versus fully treated using LC10, LC50 et LC90 of larvae after ingestion. LC50 was also used on 2-day-old larvae to evaluate the sublethal effects on larval and pupal duration, longevity and adult morphology. Results showed that, regardless of the mode of application, all concentrations had larvicidal effects with a higher dose-response effect and a higher mortality rate via ingestion than via topical application. The ovicidal effect varied with the concentrations tested, the highest mortality rate was obtained at a concentration of 7.5%. At the same dose, Carapa oil reduced large feeding galleries from 92.22 ± 5.02% in controls to 3.33 ± 3.65% at the highest dose and had a repellent effect on 80% of adults. Carapa oil increased larval and pupal duration by 2.14 and 1.35 days, respectively, and reduced adult female longevity by 2.2 days and male longevity by 1.1 days. A deformation rate of 28.33% was observed in newly emerged adults. This study demonstrated insecticidal and insect repellent effects of Carapa oil on different stages of T. absoluta. This botanical oil is a very promising biopesticide to control this major new pest of Solanaceous crops. Its use in an agroecological pest management strategy is discussed.

Mots-clés Agrovoc : biopesticide, effets sublétaux, Solanum lycopersicum, agroécologie, lutte biologique, insecticide, lutte anti-insecte, résistance aux produits chimiques, résistance aux pesticides, ravageur des plantes, Gossypium, larvicide, Tuta absoluta

Mots-clés géographiques Agrovoc : Côte d'Ivoire

Mots-clés libres : Biopesticide, Plant-based pesticide, Tomato, West Africa

Classification Agris : H02 - Pesticides
H10 - Ravageurs des plantes
H01 - Protection des végétaux - Considérations générales

Champ stratégique Cirad : CTS 4 (2019-) - Santé des plantes, des animaux et des écosystèmes

Agences de financement hors UE : Institut de Recherche pour le Développement, Centre National de Recherche Agronomique, Université Félix Houphouët-Boigny, Centre de Coopération Internationale en Recherche Agronomique pour le Développement

Projets sur financement : (CIV) Hortinet

Auteurs et affiliations

• Konan Kouassi Arthur Jocelin, UFHB (CIV) - auteur correspondant
• N'cho Anthelme J., UNA [Université Nangui Abrogoua] (CIV)
• Kouadio Marie-France N., CNRA (CIV)
• Gadji Gabaze A., CNRA (CIV)
• Coulibaly Noupe, CNRA (CIV)
• Ouali N'Goran S-W. Mauricette, UFHB (CIV)
• Martin Thibaud, CIRAD-PERSYST-UPR HortSys (FRA) ORCID: 0000-0002-4915-4436

Source : Cirad-Agritrop (https://agritrop.cirad.fr/608009/)

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