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Cogent Food & Agriculture Volume 8, 2022 - Issue 1
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ENTOMOLOGY

Toxicity and repellency of shea nut cake extracts against Sitophilus zeamais (Coleoptera: Curculionidae) and Prostephanus truncatus (Coleoptera: Bostrichidae)

Akwasi Acheampong1 Department of Chemistry (Chemical Ecology Laboratory), Faculty of Physical and Computational Sciences, College of Science, Kwame Nkrumah University of Science and Technology, Kumasi, GhanaCorrespondence[email protected] [email protected]
ORCID Iconhttps://orcid.org/0000-0003-2481-1126View further author information
ORCID Icon,
Abdullai Alhassan Naazo1 Department of Chemistry (Chemical Ecology Laboratory), Faculty of Physical and Computational Sciences, College of Science, Kwame Nkrumah University of Science and Technology, Kumasi, GhanaView further author information
,
Jonathan Osei-Owusu2 Department of Physical and Biological Sciences, University of Environmental and Sustainable Development, Somanya, GhanaView further author information
,
Abdul Tatawu Abdul Malik1 Department of Chemistry (Chemical Ecology Laboratory), Faculty of Physical and Computational Sciences, College of Science, Kwame Nkrumah University of Science and Technology, Kumasi, GhanaView further author information
&
Emmanuel Quartey1 Department of Chemistry (Chemical Ecology Laboratory), Faculty of Physical and Computational Sciences, College of Science, Kwame Nkrumah University of Science and Technology, Kumasi, GhanaView further author information
Article: 2112425 | Received 13 May 2022, Accepted 08 Aug 2022, Published online: 04 Sep 2022

Figures & data

Table 1. Percentage yield of shea nut cake extracts

Figure 1. (a) Percentage repellency of shea nut cake extracts and conventional shea butter on S. zeamais. (b) Percentage repellency of shea nut cake extracts and conventional shea butter on P. truncatus.

Figure 1. (a) Percentage repellency of shea nut cake extracts and conventional shea butter on S. zeamais. (b) Percentage repellency of shea nut cake extracts and conventional shea butter on P. truncatus.

(b)

(b)

Figure 2. (a) Mortalities of S. zeamais in the contact toxicity by topical application.(b) Mortalities of P. truncatus in the contact toxicity by topical application.

Figure 2. (a) Mortalities of S. zeamais in the contact toxicity by topical application.(b) Mortalities of P. truncatus in the contact toxicity by topical application.

Figure 3. Mortality of (a) S. zeamais and (b) P. truncatus at 500 μg/mL in impregnated filter paper toxicity test.

Figure 3. Mortality of (a) S. zeamais and (b) P. truncatus at 500 μg/mL in impregnated filter paper toxicity test.

Figure 4. Mortality of (a) S. zeamais and (b) P. truncatus at 1000 μg/mL in impregnated filter paper toxicity test.

Note: The bars are means of four replicates. Bars of the same colours with the same alphabet on them are not significantly different at 5% probability level using Turkey’s M.C.T.
Figure 4. Mortality of (a) S. zeamais and (b) P. truncatus at 1000 μg/mL in impregnated filter paper toxicity test.

Figure 5. Mortality of (a) S. zeamais and (b) P. truncatus at 2000μg/mL in impregnated filter paper toxicity test.

Note: The bars are means of four replicates. Bars of the same colours with the same alphabet on them are not significantly different at 5% probability level using Turkey’s M.C.T.
Figure 5. Mortality of (a) S. zeamais and (b) P. truncatus at 2000μg/mL in impregnated filter paper toxicity test.

Table 2. Phytochemical screening of shea nut cate (SNC) and the extracts

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