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has been cited by the following article:

• TITLE: Determination of Acute Lethal Doses of Acetamiprid and Cypermethrin for the Native Bee Apis mellifera (Hymenoptera: Apidae) in Cameroon

  AUTHORS: Sanda Mazi, Toua Vroumsia, Marie-Noel Yahangar, Malloum Malla, Dawai Zroumba

  KEYWORDS: Apis mellifera, Insecticides, Acetamiprid, Cypermethrin, Toxicity

  JOURNAL NAME: Open Journal of Ecology, Vol.10 No.7, June 29, 2020

  ABSTRACT: Honey bees are important pollinators and are essential in agriculture; as such they get exposed to a wide range of pesticides while foraging in contaminated fields or during the spray of chemical on crops. It is therefore important to know the toxicity and evaluate the impacts of bees’ exposure to these molecules. Acetamiprid and cypermethrin are two pesticides widely used in Cameroon and other countries. The objective of this study was to determine the toxicity of acetamiprid and cypermethrin on the native subspecies of Apis mellifera L. in agricultural areas in Adamaoua-Cameroon and to evaluate the impact on honeybee foragers exposed to lethal and sublethal doses of these two insecticides. The results obtained in laboratory conditions show that acetamiprid and cypermethrin are toxic to A. mellifera. The symptoms of neurotoxicity and first mortality appear 15 min after the ingestion of the high concentrations and about 30 to 45 min after the inoculation of the pesticides through contact route and the mortality increases with the concentration and time. The LC50 of acetamiprid obtained after 24 h are respectively 5.26 ng/μl for the topical application and 4.70 μg/μl by the oral route. At the same time, the LC50 of cypermethrin are respectively 2.27 ng/μl for topical application and 2.68 ng/μl for oral toxicity. For a sustainable agriculture and beekeeping, it is, therefore, important to establish quality measures on these insecticides in the ecosystem and to set up a phyto-pharmacovigilance and awareness system to the population.