Zoological and Entomological Letters
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P-ISSN: 2788-8428, E-ISSN: 2788-8436

2023, Vol. 3, Issue 1, Part A


Evaluation of the efficacy of 2.15% imidacloprid (ROCO GEL) gel against Periplaneta americana under laboratory and field conditions in Benin


Author(s): Gil G Padonou, Casimir Dossou Kpanou, Razaki Osse, Albert Salako, Boulais Yovogan, Hermann W Sagbohan, Alphonse Konkon, David Zoungbedji, Bruno Akinro, Haziz Sina, Lamine Baba-Moussa and Martin Akogbéto

Abstract: In Benin, cockroaches are infesting urban environments and developing resistance to commonly used insecticides. Therefore, developing alternative insecticides is important for resistance management. The present study aims to test the efficacy of a gel bait formulation-2.15% imidacloprid against the common cockroach Periplaneta americana under laboratory and field conditions in the commune of Abomey-Calavi. Dead and alive cockroaches were compared before and after exposure to 2.15% imidacloprid. In laboratory as well as in the community, the mortality rates of Periplaneta americana were more than 50% in 24 hours after consumption of 2.15% imidacloprid bait. Under laboratory conditions, the mortality rate was 100% after eleven (11) days while in the community, an overall mortality of 86.97% [84.3-89.3] was observed in the restrooms and 84% [76.3-89.9] in the kitchens 8 weeks after treatment with 2.15% imidacloprid. The mortality rate was similar in latrines and kitchens. Overall, mortality among adult cockroaches was 94.85% [92.8-96.5]) versus 65% [58.6-71.0] for nymphal cockroaches. The 2.15% imidacloprid did not prevent egg hatch from ootheca. These results showed that the use of 2.15% imidacloprid can be used to mitigate cockroach resistance to pyrethroid, carbamate and organophosphate insecticides in Benin.

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Zoological and Entomological Letters
How to cite this article:
Gil G Padonou, Casimir Dossou Kpanou, Razaki Osse, Albert Salako, Boulais Yovogan, Hermann W Sagbohan, Alphonse Konkon, David Zoungbedji, Bruno Akinro, Haziz Sina, Lamine Baba-Moussa, Martin Akogbéto. Evaluation of the efficacy of 2.15% imidacloprid (ROCO GEL) gel against Periplaneta americana under laboratory and field conditions in Benin. Zool Entomol Lett 2023;3(1):24-31.

Zoological and Entomological Letters