Control of cocoa mirids using aqueous extracts of Thevetia peruviana and Azadirachta indica
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 extract...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2018-01-01
|
| Series: | Cogent Food & Agriculture |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/23311932.2018.1430470 |
| _version_ | 1819119383411163136 |
|---|---|
| author | Serge Bertrand Mboussi Zachée Ambang Stéphanie Kakam Leïla Bagny Beilhe |
| author_facet | Serge Bertrand Mboussi Zachée Ambang Stéphanie Kakam Leïla Bagny Beilhe |
| author_sort | Serge Bertrand Mboussi |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-22T06:03:54Z |
| format | Article |
| id | doaj.art-601b82101421463a82bcaa463dd5567b |
| institution | Directory Open Access Journal |
| issn | 2331-1932 |
| language | English |
| last_indexed | 2024-12-22T06:03:54Z |
| publishDate | 2018-01-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Cogent Food & Agriculture |
| spelling | doaj.art-601b82101421463a82bcaa463dd5567b2022-12-21T18:36:28ZengTaylor & Francis GroupCogent Food & Agriculture2331-19322018-01-014110.1080/23311932.2018.14304701430470Control of cocoa mirids using aqueous extracts of Thevetia peruviana and Azadirachta indicaSerge Bertrand Mboussi0Zachée Ambang1Stéphanie Kakam2Leïla Bagny Beilhe3University of Yaoundé IUniversity of Yaoundé IUniversity of Yaoundé ICIRAD, UPR BioagresseursMirids, 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.http://dx.doi.org/10.1080/23311932.2018.1430470sahlbergella singularisagroforestry systembiopesticidecameroonneemyellow oleanderintegrated pest management |
| spellingShingle | Serge Bertrand Mboussi Zachée Ambang Stéphanie Kakam Leïla Bagny Beilhe Control of cocoa mirids using aqueous extracts of Thevetia peruviana and Azadirachta indica Cogent Food & Agriculture sahlbergella singularis agroforestry system biopesticide cameroon neem yellow oleander integrated pest management |
| title | Control of cocoa mirids using aqueous extracts of Thevetia peruviana and Azadirachta indica |
| title_full | Control of cocoa mirids using aqueous extracts of Thevetia peruviana and Azadirachta indica |
| title_fullStr | Control of cocoa mirids using aqueous extracts of Thevetia peruviana and Azadirachta indica |
| title_full_unstemmed | Control of cocoa mirids using aqueous extracts of Thevetia peruviana and Azadirachta indica |
| title_short | Control of cocoa mirids using aqueous extracts of Thevetia peruviana and Azadirachta indica |
| title_sort | control of cocoa mirids using aqueous extracts of thevetia peruviana and azadirachta indica |
| topic | sahlbergella singularis agroforestry system biopesticide cameroon neem yellow oleander integrated pest management |
| url | http://dx.doi.org/10.1080/23311932.2018.1430470 |
| work_keys_str_mv | AT sergebertrandmboussi controlofcocoamiridsusingaqueousextractsofthevetiaperuvianaandazadirachtaindica AT zacheeambang controlofcocoamiridsusingaqueousextractsofthevetiaperuvianaandazadirachtaindica AT stephaniekakam controlofcocoamiridsusingaqueousextractsofthevetiaperuvianaandazadirachtaindica AT leilabagnybeilhe controlofcocoamiridsusingaqueousextractsofthevetiaperuvianaandazadirachtaindica |