Skip to content
Research Article Open access CC BY 4.0

Insecticidal and repellent activities of Azadirachta indica A. (Juss) oil against fifth instar larvae and adults of Sahlbergella singularis (Hemiptera:Miridae)

Koffi Gagnon Ankou, Lankondjoa Kolani, Essolakina Magnim Bokobana, Abouwaliou Nadio, Koffi Koba, Komla Sanda

Asian Journal of Agricultural and Horticultural Research · pp. 154–160 · Published 22 Jun 2023

10.9734/ajahr/2023/v10i4256

Abstract

Sahlbergella singularis is one of the insects that causes the most damage to cocoa trees in Togo. The management of this pest is mainly based on chemical control, with its negative consequences for human health and the environment. In order to find an alternative to the use of synthetic pesticides, the insecticidal and repellent activities of neem oil were tested in vitro on fifth instar larvae and adults of S. singularis.  Larvae were collected from a cocoa plot. The fifth instar larvae were separated from the other stages. Some of the larvae were reared in the laboratory until adult emergence. The concentrations of neem oil used were 0.5, 1, 1.5, 2 and 2.5 µl.ml-1. Insecticidal tests were carried out by spraying the solutions directly onto the insects. The repellency test was carried out using the preferential zone method on filter paper. The results showed an increasing mortality rate with increasing concentrations of neem oil for both fifth instar larvae and adults. The calculated LC50’s for larvae and adults were 0.89 and 0.98 µl.ml-1 respectively. Neem oil had a weak repellent effect on both fifth instar larvae and adults, with average repellency rates of 23.60% and 28.8% respectively. These results show that neem oil can be an alternative to the use of synthetic pesticides in the control of S. singularis.

Azadirachta indica Sahlbergella singularis larvae adults insecticidal repellent

References (22)

  1. 1 A Method of Computing the Effectiveness of an Insecticide [DOI]
  2. 2 Essential Oils in Food Preservation, Flavor and Safety [DOI]
  3. 3 Azadirachtin from the neem tree Azadirachta indica: its action against insects [DOI]
  4. 4 Cocoa production in West Africa, a review and analysis of recent developments [DOI]
  5. 5 Neem Oil and Crop Protection: From Now to the Future [DOI]
  6. 6 Environmental impacts of cocoa production and processing in Ghana: life cycle assessment approach [DOI]
  7. 7 Monitoring of organochlorine pesticides in blood of women with uterine cervix cancer [DOI]
  8. 8 Serum organochlorine pesticides residues and risk of cancer: A case-control study [DOI]
  9. 9 Gene–environment interactions in heavy metal and pesticide carcinogenesis [DOI]
  10. 10 Olfactory Mechanisms for Discovery of Odorants to Reduce Insect-Host Contact [DOI]
  11. 11 Contamination levels of organophosphorus and synthetic pyrethroid pesticides in cocoa beans from Ghana [DOI]
  12. 12 Agrochemicals as a potential cause of ground water pollution: A review
  13. 13 Knowledge and perception of Ghanaian cocoa farmers on mirid control and their willingness to use forecasting systems [DOI]
  14. 14 Strategy for Insect Pest Control in Cocoa [DOI]
  15. 15 Comprehensive strategy for pesticide residue analysis in cocoa beans through qualitative and quantitative approach [DOI]
  16. 16 Farmers’ Perceptions of the Effectiveness of the Cocoa Disease and Pest Control Programme (CODAPEC) in Ghana and Its Effects on Poverty Reduction [DOI]
  17. 17 Toxicological and repellent potential of some plant extracts against stored product insect pest, Tribolium castaneum (Herbst.) (Coleoptera: Tenebrionidae) [DOI]
  18. 18 Automated radiosynthesis of [18F]ciprofloxacin [DOI]
  19. 19 Screening organic repellent compounds against Lutzomyia longipalpis (Diptera: Psychodidae) present in plant essential oils: Bioassay plus an in silico approach [DOI]
  20. 20 Biocontrol of the Brown Cocoa Mirids Using Neem Oil and an Ethanolic Extract from Neem under Laboratory Conditions [DOI]
  21. 21 Preliminary Evaluation of New Candidate Materials as Toxicants, Repellents, and Attractants Against Stored-Product Insects—I [DOI]
  22. 22 Evaluation of neem {Azadirachta indica A. Juss) seed extracts for the management of some cocoa mirid species.

Cited by 2

Essential oil-loaded polymeric nanoparticles as a viable alternative to control storage grain insects -a review

Asha Choudhary, Usha Rani, Rajesh Thakur · Journal of Stored Products Research · 2024

Showing 1 of 2 known citations — external sources report more than can currently be individually listed.

Related research

Article metrics

Real usage data collected on this platform.

3

Page views

0

PDF downloads

0

Outbound clicks

2

Citations

Views over time

Views by country

Approximate, from request IP at view time — not citizenship or institution. Countries with fewer than 5 views are grouped as "Other".

Traffic sources

Referring site, by host.

Views and downloads exclude known bots/crawlers. Citations combines this platform's own DOI-resolved index with each external source's own reported total — see Cited by above for individually listed citing works. Last refreshed 0 seconds ago.