AN ASSESSMENT OF THE EFFECTS OF SOME PLANT OILS ON DERMESTES MACULATUS (DEGEER) LARVAE IN SMOKE-DRIED PROTOPTERUS ANNECTENS (OWEN)

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dc.contributor.authorOGUNDUYILE, FOLASADE DAMILOLA
dc.date.accessioned2016-05-23T08:26:04Z
dc.date.available2016-05-23T08:26:04Z
dc.date.issued2015-12
dc.descriptionA THESIS SUBMITTED TO THE SCHOOL OF POSTGRADUATE STUDIES AHMADU BELLO UNIVERSITY ZARIA IN PARTIAL FULFILLMENT OF REQUIREMENTS FOR THE AWARD OF A MASTER OF SCIENCE DEGREE (M.Sc) IN FISHERIES DEPARTMENT OF BIOLOGICAL SCIENCES, FACULTY OF SCIENCE, AHMADU BELLO UNIVERSITY, ZARIA, NIGERIA.en_US
dc.description.abstractThe toxicity and repellency of Dermestes maculatus larvae by the oils of Allium sativum(Garlic), Cocos nucifera (Coconut), Zingiber officinale (Ginger), Jatropha curcas (Jatropha) and Azadirachta indica (Neem) were evaluated in the laboratory. Late instar larvae of D. maculatus were introduced into Kilner jars containing fish treated with these oils, whose physicochemical properties and fatty acid composition had been previously determined. Jars with untreated fishserved as control. Results obtained showed that the oils caused significant mortality (P<0.05) in D. maculatuslarvae on treated fish compared to the untreated fish at 96h after infestation. 100% mortality was recorded for all the oils at the highest concentration (0.256ml/g of fish) by the 96th hour of exposure. Repellency was highest in A. sativum oil (87%) and lowest in A. indica oil (59%) at the highest concentration (0.256ml/g of fish) within 24 hours of exposure. The physicochemical properties of the oils showed that acid values of the oils were below 10 mg/KOHg except in A. indica which had 12.75mg/KOHg (potassium hydroxide). Saponification values ranged from 190.74 (A. sativum) to 251.05 (C. nucifera). Zingiber officinaleoil had the highest peroxide value 2.96mg/100g while J.curcas oil had the lowest (0.65mg/100g). Refractive index values ranged from 1.24 (J. curcas) to 1.49 (A. sativum). The fatty acids detected in the oils were: oleic (in J. curcas and A. indica); octadecanoic (in Z. officinale and C. nucifera);stearic and palmitic acids (in A. indica and C. nucifera);lauric, linoleic and myristic acids (in C. nucifera); octadecanoic acid (in J. curcas) and cyclopropanepentanoic acid (in Z. officinale). The occurrence of these fatty acids might be responsible for the insecticidal properties exhibited by the oils. The larvicidal and repellent properties of the oils in offering effective protection against infestation and damage by D. maculatus have been clearly demonstrated in this study; the oils are therefore recommended for utilization in post-harvest preservation of smoke-dried fish.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/7901
dc.language.isoenen_US
dc.subjectASSESSMENT,en_US
dc.subjectEFFECTS,en_US
dc.subjectPLANT OILS,en_US
dc.subjectDERMESTES MACULATUS,en_US
dc.subject(DEGEER),en_US
dc.subjectLARVAE,en_US
dc.subjectSMOKE-DRIED,en_US
dc.subjectPROTOPTERUS ANNECTENS,en_US
dc.subject(OWEN),en_US
dc.titleAN ASSESSMENT OF THE EFFECTS OF SOME PLANT OILS ON DERMESTES MACULATUS (DEGEER) LARVAE IN SMOKE-DRIED PROTOPTERUS ANNECTENS (OWEN)en_US
dc.typeThesisen_US
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