The Synergistic Effect Of Acethonilic Ipomoea Cairica Leaf Extract Combined With Entomopathogenic Fungi Metarhizium Anisopliae On The Larvae Of Dengue Vectors
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Date
2018-02
Authors
Md Rodzay, Rohaiyu
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
The common approach to ward-off epidemics of this dengue viruses is
depends on chemical insecticides. However, due to the public concerned and
environmental protection strategies, more researches on biological control of the
vector are actively proposed. The use of bio-potency natural products from plant
derivatives, which are Ipomoea cairica (coastal morning glory) and
entomopathogenic fungi (Metarhizium anisopliae) were evaluated in this study
towards the larvae stage of Aedes aegypti and Aedes albopictus mosquitoes. Ipomoea
cairica leaves plant extracts were segregated for the extraction preparation using a
Soxhlet apparatus with acetone as the solvent. The results from bioassay demonstrate
that I. cairica leaves extract treatment were highly effective to induce larvicidal
mortality of Ae. albopictus and Ae. aegypti within 24 and 48 hours post-treatment.
Results from factorial analysis of variance (ANOVA) also indicated there were
significant differences in larvicidal activity between species and strains used
(P<0.05). Based on probit analysis, it is interesting to notify that the sequence of
effectiveness larvicidal activity of I. cairica acethonilic leaves extract are in the
manner; Ae. albopictus field strain > Ae. aegypti laboratory strain > Ae. aegypti field
strain > Ae. albopictus laboratory strain. Eventhough, I. cairica extracts showed high
efficiency against Ae. albopictus compared to Ae. aegypti, however, it is contended
for us to identify I. cairica leaves extract still effective towards Aedes larvae.
Description
Keywords
Ipomoea cairica leaf extract combined with entomopathogenic fungi , metarhizium anisopliae on the larvae of dengue vectors