Study
was carried out in the Fisheries Research Laboratory, Ahmadu Bello University
to evaluate the effect of Citrullus
colocynthis (Eguisi) and Citrullus
vulgaris (Watermelon) seed oils on the larvae of Dermestes maculatus, an important pest of smoke-dried Clarias gariepinus (African catfish).
The effect of the oils at different tested concentrations against the larvae of
D. maculatus was dose dependent as
3.33% and 81.11% mortality for C.
colocynthis while 2.22% and 91.11% for C.
vulgaris were recorded for 0.027 mLg-1 and 0.081mlg-1respectively
at 96 hours’ exposure time. The interaction effect of 0.081mlg-1
watermelon seed oil and 96h exposure gave the highest kill compared to eguisi
seed oil at the same concentration and time which was significantly (p<0.05)
more than the percent kill of the other concentrations and exposure time. At
0.243 mLg-1 both oils killed 100% of D. maculatus larvae even at 24h exposure time. It is therefore
concluded that 0.081mlg-1 and 0.243 mLg-1 of both C. colocynthis and C. vulgaris seed oil could be applied as botanical insecticides to
prevent smoke-dried fish from D.
maculatus larvae attack.
Citrullus colocynthis Citrullus vulgar-is Dermestes maculatus larvae Larvi-cidal effect Dried catfish
Subjects | Hydrobiology |
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Journal Section | Articles |
Authors | |
Publication Date | January 2, 2017 |
Published in Issue | Year 2017 |