ISSN 2736-173X
African Journal of Malaria and Tropical Diseases ISSN 2736-173X Vol. 14 (1), pp. 001-004, January, 2026. Available online at www.internationalscholarsjournals.org © International Scholars Journals
Full Length Research Paper
Long-term Stability and Bioactivity of Ocimum kilimandscharicum Extracts Against Anopheles gambiae s.s.
Eliningaya J. Kweka1*, Hassan M. Nkya2, Lucile Lyaruu1, Epiphania E. Kimaro1 Beda J. Mwang’onde1 and Aneth M. Mahande3
1Tropical Pesticides Research Institute, Division of Livestock and Human Diseases Vector Control, P.O. Box 3024, Arusha, Tanzania.
2Tanzania Wildlife Research Institute, P. O. Box 661, Arusha, Tanzania.
3Tropical Pesticides Research Institute, Mabogini field station, Moshi, Tanzania.
Accepted 19 August, 2025
Reducing vector-human contact is of priority in breaking the transmission chain of malaria parasites. The use of plant extracts as repellents against malaria vectors have been advocated in different studies. The feeding inhibition of four years old Ocimum kilimandscharicum in liquid paraffin or glycerin was compared with N, N-diethyl-3-methylbenzamide (DEET) using cage evaluation method. The four years old extracts of O. kilimandscharicum performed similarly when mixed either in glycerine or liquid paraffin. Blood feeding succession was highest in negative control (glycerine/liquid paraffin alone) while low in OK and DEET. Therefore, promotion of plant extracts for commercialization is of priority in rural Tanzania where whole plants are currently used as repellents against malaria vectors.
Key words: Ocimum kilimandscharicum, DEET, Anopheles gambiae s.s, feeding inhibition.