maculatus

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    THE COMPARATIVE EFFECT OF MYRISTICA FRAGANS (NUTMEG) AND AFRAMOMUM MELEGUETA (ALLIGATOR PEPPER) ON DEMESTES MACULATUS DEGEER.

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    ABSTRACT
    This work was done at the laboratory of the Fisheries and Marine Technology, Imo State polytechnic Umuagwo-Ohaji. Two plant products, Myristica fragans and Aframomum melegueta obtained from the local market were pulverized and dissolved in Alcohol and water at concentrations of 1g/l, 1.5g/l, 2g/l, 2.5g/l, 3g/l, 3.5g/l and 4g/l. Chunks of Clarias gariepinus (1cm Thick) were soaked in above solution for 24hours. These were smoke-dried and allowed to condition in the laboratory for two days before introducing the insect pest, Dermestes Maculatus. The insects were repelled by the treated fish for about 3days before they could bore into it and establish. Dry powder treatment was administered between 1g-4g/10g fish. Myristica fragans instantly repelled insects while Aframomum Melegenta did not. Myristica fragans powder at all levels of treatment caused significantly (P<0.05, ANOVA) higher mortalities than in control experiment. Myristica fragans dissolved in water (H2O) did not produce significant (P>0.05, ANOVA) mortality at all concentrations. M. fragans in Alcohol treatment produced significantly higher mortalities over Nutmeg (M. fragans) in water treatments. Alcohol extract of Nutmeg at 3.5g/l produced significantly (P<0.05 ANOVA) higher mortalities over all other concentrations. Treatment using Aligator pepper (Aframomum melegueta) in water at 2g/l gave significantly higher mortalities (P<0.05, ANOVA) between Nutmeg in Alcohol at 3g/l, Alcohol and Aligator treatment at 3.5g/l, Water and Aligator pepper at 2g/l. In powder treatments the highest mortalities were found in the highest doses 3.5g/10g fish when compared with doses of Aligator pepper (Aframomum Melegueta) were there were mortalities.

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