USE OF SOME PLANT OIL EXTRACTS AS SURFACE PROTECTANT AGAINST STORAGE INSECT PEST, Dermestes maculatus Degeer, ON SMOKED FISH
Abstract
Crude oil extracts obtained from the seeds and leaves of some plants which are commonly used as spices and food condiments in the tropics; Piper guineense, Monodora myristica, Aframomum melegueta, Tithonia diversifolia and Nicotiana tabacum were evaluated as protectants against different stages (adults, pupae, larvae and eggs) of fish beetle(Dermestes maculatus Degeer). The oil extracts were applied to disinfected muscle of smoked fish at 10% (wlv). Newly emerged (0 -24 hour old) adults, pupae, larvae, and eggs of D.maculatus were introduced into kilner jar each containing treated and untreated fish samples. Insect infected fish without any crude oil treatment served as control. All the treatments were in triplicates. Evaluation of the potency of the oil extracts was based on the insect mortality, pupae formation and percentage egg hatchability. The weight losses in fish muscle in the treated and untreated samples were compared as index of fish damage during storage. The results showed that oil extracts from P.guineense, M. myristical and A.melegueta were significantly (P <_ 0.05) effective in killing all the adults, pupae and eggs of D.maculatus while the effect of oil extracts from N.tabacum and T.diversifolia were not significantly different (P ? 0.05) from the untreated (control) smoked fish infected with the storage insect pest. The percentage weight loss in fish during storage was significantly reduced (P <_ 0.05) in fish treated with the plant oil extracts from P.guineense, M.myristical and A.melegueta compared with fish treated with oil extracts and the control fish. This study showed that oil extractives from P.guineense, M.myristical and A.melegueta were capable of controlling different stages of D.maculatus in smoked fish during storage. However, further studies are needed to evaluate the active ingredients, toxicity and concentrations of these oil extracts for effective use in controlling insect pests of fish during storage.
References
Ames. G.R. 1992. Traditional and modern post harvest technologies for increased food and supply from Inland Fisheries in Africa. In: Proceedings of
the symposium of post harvest fish technology, Cairo, Egypt. FAaCIFA Technical Paper, 19, pp. I1-17.
Asita Asita 2000. Protection of smoke dried fish from fungi infestation by wood smoke differing iu mutagenic potencies. Discovery and innovation 12 (1/2): 85-87.
Balogun, A. M. 1992. Fish handling and quality control. In: Aquaculture Development in Africa: Training and References Manual for Aquaculture Extensionists. (I.G. Cowx, Ed.) Published by Commonwealth Secretariat, London. Pp.290-318.
Bhaduri, N., Gupta, D.P. and Ram, S. 1990. Effect of vegetable oils on the oviposition behaviours of Callosobrucus maculatus (Fabricus) In: Fuju, K, Gatehouse, A.M., Johnson, C.D., Mitchell, R. and Yosida, T. (Eds.): Bruchids and legumes: Economics, Ecology and Co-evolution pp.81-84.
Clucas, J. J. (compiler). 1982. Fish handling, preservation and processing in the tropics. Part 2. Report of the Tropical Products Institute G145, viii + 144pp.
Duncan, D. B. 1955. Multiple Range and Multiple F.-Test. Biometrics 11: 1-12.
Fasakin, E. A. and Aberejo, O. 2000. Effect of some pulverized plant materials on the developmental stages of fish beetle, Dermestes maculatus Degeer in smoked catfish (Clarias gariepinus) during storage. Bioresource Technology 85:173-177
Fasakin, E. A. 2003. Resistance status of some commercially smoked fish species to storage insect pest, Dermestes maculatus Deeger in the tropics. Nig. J. Appl. Biology 4 (1): 41-45.
Horn, D. J. 1988: Ecological approach to pest management. Elsevier, London. 345pp.
Ivbijaro, M F. 1984. Toxic effect of groundnut oil on the weevil, Silophiluis oryzae (L). Insect Science and its Application 51:251-252.
Lale, W. E. S. 1995. An overview of the use of plant products on the management of stored products, Coleoptera, in the tropics. Post harvest News and Information 6: 69-75.
Mass-van Berkel van den Bogaard, B., Heijucen, C. 1996. Preservation of fish and rneat.pp.2-7. Agrodok-series No 12, Agromisa, Wageningen, The Netherland.
Odeyemi, O. O. and Daramola, A. M. 2000. Storage practices in the tropics.Vol.I: Food storage and pest problems. Dave Collins Publications, Akure. 253 pp.
Odeyemi, O. 0., Owode, R. A. and Akinkurolere A. 2000. Toxicity and population suppression effects of Parkia clappertomiana on dried fish pests (Dermestes maculatus and Necrobia ra Pipes). Global Journal of Pure and Applied Sciences 6(2): 191-195.
Ofuya, T. I., Okoye, B. C. and Olola, A. S. 1992. Efficacy of crude extracts from seeds of Monodora myristica (Gaetn) Dunnal as surface protestant against Callosobruchus maculatus attacking legume seeds in storage. Journal of Plant Diseases and Protection. 99 (5): 528-532.
Osuji, F. W. C. 1985. Recent studies on the infestation of dried fish in Nigeria by Dermestes maculatus and Necrobia rufipes with special reference to Lake Chad District. Tropical Stored Product Information.29: 21-32.
