| Summary: | Background. Aedes aegypti is the main vector of dengue
fever in South East Asia. Interrupting the life cycle of
the vector is main strategy to reduce the incidence of
filariasis. The breeding of the mosquito is cut down by
larvicide, especially synthetic larvicide. This causes
problems especially when synthetic larvicide is applied
uncontrollably. The problems consist of vector resistance
and environmental pollution. Therefore, it is essential
to search for alternative larvicide, for instance
Zingiber zerumbet as natural larvicide.
Objectives. To explore larvicidal effect of Zingiber
zerumbet roots with eter extract. To find out LC50 and
LC90 of the extract against 3rd/4th instar larvae of Aedes
aegypti. To find out the relation between variety of the
extract dose and larvae mortality.
Methods. This research is quasi experimental study using
WHO 2005 guidance. 3rd/4th instar larvae divided into 6
treatment groups and 1 control group. Each group contains
10 larvae with 3 times replication in 100 ml solution.
Larvae mortality was counted after 24 hours of exposure
and the data was analyzed using probit analysis.
Result. LC50 and LC90 values were 51.45925 ppm and
158.8763 ppm. The probit regression line obtained is Y
= -2.27 + 3.91X.
Conclusion. Eter extract of Zingiber zerumbet roots has
larvacidal activity against 3rd/4th instar of Aedes
aegypti larvae. LC50 and LC90 values were 51.45925 ppm and
158.8763 ppm. The increasing dose of the extract
increases larvae mortality.
Keyword: Aedes aegypti, Zingiber zerumbet, botanical
larvicide, probit analysis
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