Control of cocoa mirids using aqueous extracts of Thevetia peruviana and Azadirachta indica
| Autor: | Leïla Bagny Beilhe, Serge Bertrand Mboussi, Zachée Ambang, Stephanie Kakam |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Efficacité d'utilisation Insecticide d'origine végétale Gestion intégrée des ravageurs Chemical management 01 natural sciences lcsh:Agriculture Sahlbergella singularis Theobroma cacao cameroon Q60 - Traitement des produits agricoles non alimentaires Aqueous solution Thevetia Azadirachta indica integrated pest management lcsh:TP368-456 biology agroforestry system High mortality lcsh:S Azadirachta biology.organism_classification H10 - Ravageurs des plantes neem Agricultural and Biological Sciences (miscellaneous) biopesticide Apocynaceae Extrait d'origine végétale lcsh:Food processing and manufacture 010602 entomology Horticulture sahlbergella singularis PEST analysis Sahlbergella yellow oleander 010606 plant biology & botany Food Science |
| Zdroj: | Cogent Food & Agriculture, Vol 4, Iss 1 (2018) Cogent Food and Agriculture |
| ISSN: | 2331-1932 |
| DOI: | 10.1080/23311932.2018.1430470 |
| Popis: | Mirids, Sahlbergella singularis, are the most harmful cacao pest in Africa. Chemical management, although controversial, is currently the only effective option for controlling these pests. Based on in vitro and field experiments, this study evaluated and compared the effectiveness of aqueous extracts obtained from the seeds of Thevetia peruviana (TP) and Azadirachta indica (AI) in controlling cocoa mirids, S. singularis. Thevetia peruviana extracts proved to be more effective than A. indica extracts and were as effective as Actara 25 WG, the benchmark insecticide, in reducing mirids in the field. All the aqueous extracts tested in vitro displayed insecticidal activities within maximum eight days and some repellent effects at both 10 and 25% w/v. Treatment of mirid food with the extracts also led to high mortality rates and to significant avoidance of pods treated with the TP25, TP10 and AI25%. The use of plant aqueous extracts to control mirids in the field thus offers promising prospects for the control of this pest, given the availability of the plants, their simple preparation, their effectiveness and their eco-friendly features. |
| Databáze: | OpenAIRE |
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