Entomocide effect of Alstonia boonei De wild on reproductive performance of Dermestes maculatus (Coleoptera: Dermestidae
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ORIGINAL RESEARCH ARTICLE
Entomocide effect of Alstonia boonei De wild on reproductive performance of Dermestes maculatus (Coleoptera: Dermestidae) infestation on smoked catfish Claria gariepinus (Pisces: Clariidea) Kayode David Ileke 1 & Jacobs Mobolade Adesina 2
&
Atilola Olateju Abidemi-Iromini 3 & Muslimat Seyi Abdulsalam 4
Received: 12 May 2020 / Accepted: 6 October 2020 # African Association of Insect Scientists 2020
Abstract Efficacy of Alstonia boonei powders and extracts against Dermestes maculatus (Coleoptera: Dermestidae) infesting stored smoked dried catfish (Claria gariepinus) were investigated in the laboratory. The products were tested at 2.5 g, 5.0 g, 7.5 g, 10 g, 12.5 g and 15 g and 1%, 2%, 5%, 10%, 15% and 20%/100 g of smoked catfish respectively. The ability of the plant to protect smoked catfish in terms of mortality rates, number of eggs laid and adult emergence were evaluated. All the tested plant parts caused significant mortality (P < 0.05) of adult D. maculatus. Alstonia boonei stem bark powder was the most potent, causing 100% mortality at 7.5 g of 8 days post exposure, followed by leaf powder which evoked 87.5% mortality after 10 days of exposure. For the extracts, adult mortality of D. maculatus was positively correlated with dose and exposure duration. Alstonia boonei product extracts significantly reduced the development of D. maculatus compared to the control. Stem bark extract significantly prevented oviposition. The use of A. boonei stem bark is advocated for the control of D. maculatus infestation. Further study is needed to characterize the chemical constituents and understand its mode of action with the likely formulation into herbal insecticide as alternative to synthetic insecticides. Keywords Entomocide . Alstonia boonei . Dermestes maculatus . Mortality . Reproductive performance
Introduction Fish is one of the cheapest source of animal protein used to reduce cholesterols that cause high blood pressure amongst elders (Ileke et al. 2020a). Fish consumption provides an important nutrient to a large number of people globally and thus makes a very substantial contribution to human nutrition (Fasakin and Aberejo 2002; Azam et al. 2004; Akinwumi * Jacobs Mobolade Adesina [email protected] 1
Department of Biology, School of Science, Federal University of Technology, P. M. B. 704, Akure, Ondo State, Nigeria
2
Department of Crop, Soil and Pest Management Technology, Faculty of Agricultural Technology Rufus Giwa Polytechnic, P. M. B. 1019, Owo, Ondo State, Nigeria
3
Department of Fisheries and Aquaculture, School of Agriculture and Agricultural Technology, Federal University of Technology, P. M. B. 704, Akure, Ondo State, Nigeria
4
Department of Biology, Faculty of Science and Technology, National Open University, Abuja, Nigeria
2011; Ajayi et al. 2019; Jangampalli 2019; Ileke et al. 2020a). Smoked fish is a highly preferred item of many traditional dishes in Nigeria and it is a condiment that greatly enriches the flavour of various dishes and a good alternative
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