THE COMPARATIVE EFFECT OF MYRISTICA FRAGANS (NUTMEG) AND AFRAMOMUM MELEGUETA (ALLIGATOR PEPPER) ON DEMESTES MACULATUS DEGEER.
in SCIENCE LAB TECHNOLOGY PROJECT TOPICS AND MATERIALS on September 18, 2020CHAPTER ONE
1.0 INTRODUCTION
Fish protein is known to be the best and cheapest source of animal protein (Olayide 1973) the loss of protein in dried fish due to known fish pest D. Macuatus has been variously qualified.
Fish is a perishable biomaterial especially in the tropics where high temperature and humidity accelerate spoilage and Biodeterioration of fish immediately after catch. As a result of this, efforts are primarily directed towards the preservation of fish for human food.
However, poor handling, inadequate processing facilities, lack of ice or storage facilities, remoteness of the fishing villages to urban market centers, poor distribution channels have drastically reduced fish utilization in the tropics (Ames,1992). Efforts at the use of synthetic insecticides and other methods to control D. Maculatus have not presented pleasant results. This has led to a search for alternative user friendly methods especially the use of botanicals to control D. Maculatus (Okorie et al 1991).
The use of chemicals has helped increase of yields obtained but one of the major problems with the constant use of chemicals is that resistance can be induced in target organisms. Biological method control has been preferred in some cases because it is selective with no side effect and cheap. Resistance to biological control is rare and biological control agents are self propagating and self perpetuating (Okigbo and Ikediugwu 2000; Okigbo, 2003—-2005).
Plants extracts have been used successful to control insect and pest in the tropics. (Amadioha and Obi, 1999; Onitade 2000. Emoghene, 2004).
The practice of applying synthetic insecticides has been found to be potentially dangerous when such fish is consumed. In some villages in Ghana where fish have been treated in this manner, people who consumed them, suffered blurred vision, dizziness and vomiting (Bull 1982).
Losses due to this polyphagons pest of products of animal origin has been properly documented for a very long time (Aret, 1964, Willams 1956, Proctor, 1970, Kimura and Takakura).
Dry fish is however susceptible to pest infestation. Osuji (1973) noted that D. Maculatus is the major pest of dry fish with occasional presence of others like Necrobia, Rufipes, Tubolium, Castenum, and Trogoderma, granamium. The two are pests of other products.
The importance of D. Maculatus in Nigeria has been highlited (Hayward 1961). Researches have extended to the use of extracts water and alcohol extracts of such botanicals as P. guineese, X. Aethropica, Myristica fragrans etc.
