Khasiat pokok semambu
Assesssment the
molluscicidal properties of azadirachtin against golden apple snail, Pomacea
canaliculata
Abstract
Concern
with the negative impact of synthetic pesticide on environment and human health
have led this study in order to evaluate the molluscicidal efficacies of
azadirachtin in neem seed crude extract on golden apple snail.
Azadirachtin
was extracted by maceration technique using four different solvents and the
quantity of azadirachtin in extracts was compared to select the best solvent.
Then,
bioassays were performed on adult of golden apple snail to compare the
molluscicidal activity of azadirachtin.
A comparison
of the extractive yields of different solvents indicated that the polarity of
the solvents tested not significantly influence in enhanced the azadirachtin
yields.
The result
on mortality rate of golden apple snail subjected to various concentration and
solvent extracts indicated that neem seed crude extracts significantly killed
the golden apple snail.
The LC50 values
of the methanol extract (21.008mg/ml) were the lowest, indicating the highest
potency, followed in order by ethanol extract (43.726mg/ml), acetone extract
(48.110mg/ml) and water extract (53.654mg/ml).
The mortality rate was correlated positively
with the extract concentrations as the mortality of snail increased with the
increase of extract concentration.
Therefore,
this study indicated that neem seed crude extracts possessed molluscicidal
effect for controlling the golden apple snail
.
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