2 research outputs found
Larvicidal activities of Biostop Moustiques®, a botanical insecticide on field collected malaria mosquito Anopheles gambiae sensu lato in Togo
The larvicidal activity of a botanical insecticide, Biostop Moustiques® (BM), was studied on field collected larvae of Anopheles gambiae s.l at the concentrations of 1, 5, 10 and 20 mL/L of water. The samples were made based on three different localities of Togo: Lomé, Kovié and Kolokopé. BM had high mortality rates at 20 mL/L in all instars larvae. Specifically, significant high mortality rates were recorded in L3 and L4 from field collected strain at a very low concentration (1 mL/L), compared to laboratory strain. In general, this study showed that the botanical insecticide tested has almost the same larvicidal effect no matter the strains of Anopheles gambiae used.Keywords: Biostop Moustiques®, Larvicidal activity, Anopheles gambiae, Togo
Evaluation de l’efficacite des moyens de lutte antivectorielle utilisés dans les ménages au Togo
Une Ă©tude rĂ©alisĂ©e Ă LomĂ© (Togo) a portĂ© sur l’évaluation de la sensibilitĂ© des femelles d’Anopheles gambiae Ă jeun, âgĂ©es de 2 Ă 5 jours, aux classes d’insecticides utilisĂ©es en santĂ© publique, sur la caractĂ©risation des mĂ©canismes de rĂ©sistance, sur l’évaluation de l’efficacitĂ© de nouvelle gĂ©nĂ©ration de moustiquaires imprĂ©gnĂ©es Ă longue durĂ©e d’action (MILDA) et des produits insecticides Ă usage domestique. Les tests de sensibilitĂ© ont rĂ©vĂ©lĂ© que les moustiques sont tous sensibles au FĂ©nitrothion 1% (100% de mortalitĂ©). Les bombes aĂ©rosols utilisĂ©s dans les mĂ©nages sont efficaces sur les moustiques Ă Â l’exception d’ORO, de MOBIL et de TOTAL. Quant aux spirales, seul le BAYGON a étĂ© efficace. L’identification spĂ©cifique a permis de mettre en Ă©vidence Anopheles gambiae s.s, Anopheles coluzzii et Anopheles gambiae. Anopheles coluzzii prĂ©domine (95,55% spĂ©cimens) sur Anopheles gambiae (4,44% spĂ©cimens). La mutation gĂ©nĂ©tique homozygote Kdr/Kdr est observĂ©e chez 81% spĂ©cimens d’Anopheles coluzzii contre 50% chez Anopheles gambiae. Une activitĂ© enzymatique Ă©levĂ©e a Ă©tĂ© observĂ©e chez les spĂ©cimens de la souche sauvage. Toutes les MILDA testĂ©es sont efficaces mĂŞme après les 20 lavages sur la souche Kisumu.Mots clĂ©s: Anopheles gambiae s.s, Anopheles coluzzii et Anopheles gambiae, Kdr, MILDA, insecticidesEnglish Title: Evaluation of the efficacy of household vector management tools used in TogoEnglish AbstractSusceptibility trials with 2 to 5 days old females Anopheles have been conducted in Lome (Togo) on insecticides used in public health and households. These trials concerned also the resistance mechanisms and bio efficacy of new generations of long lasting insecticidal nets (LLINs). The results showed that the mosquitoes were fully susceptible to Fenitrothion 1% (mortality: 100%). They were also susceptible to the  only mosquito coil BAYGON and most of the spray insecticides were effective except ORO, MOBIL and TOTAL. The specific characterization revealed the presence of only An. gambiae s.s with Anopheles coluzzii and Anopheles gambiae. Anopheles coluzzii is predominant (95.55% specimens) over Anopheles gambiae (4.44% specimens). Homozygote Kdr/Kdr has been observed in 81% of Anopheles coluzzii versus 50% in Anopheles gambiae. High enzymatic activity was obtained in most of the wild strain. All the LLINs were effective on the susceptible Kisumu strain even after 20 washes.Keywords: Anopheles gambiae s.s, Anopheles coluzzii and Anopheles gambiae, Kdr, LLINs, insecticidesÂ