Field evaluation of bamboo leaf infusion as oviposition attractant to dengue mosquito Aedes aegypti (L.) and release of water bug Diplonychus rusticus F. against mosquito wrigglers in San Pablo City, Laguna

Issue Date

10-2016

Abstract

The efficiency of organic bamboo leaf infusion (BLI) (34 g senescent bamboo leaves soaked in 4 L water for 1 week) as oviposition attractant to gravid female dengue mosquito Aedes aegypti (L.) was evaluated from December 2013 to February 2014 in 10 households in Barangays [villages] Concepcion and Sto. Angel, San Pablo City, Laguna [Philippines] which was previously reported to have highest dengue incidence in Region 4A [Cavite, Laguna, Batangas, Rizal, Quezon]. Likewise, the effectiveness of water bug, Diplonychus rusticus F. as predator of dengue incidence in Region 4A. Likewise, the effectiveness of water bug, Diplonychus rusticus F. as predator of dengue mosquito wrigglers that hatched from the eggs laid by gravid female A. aegypti in BLI, was assessed. Very high oviposition activity indices (OAI) of 0.85 and 0.89 were observed in Brgy. Concepcion and Sto. Angel respectively, suggesting that BLI is a potent oviposition trap. In Brgy. Concepcion, a total of 10,915 eggs and 11,514 larvae were monitored for six weeks in Brgy. Sto. Angel. About 91% of the eggs and 40, 222 larvae in 10 households were monitored in 10 households in three weeks while, 31,979 eggs and 40,222 larvae in 10 households were monitored in six weeks in Brgy. Sto. Angel. About 91% of the eggs were laid in BLI and only 9% in water alone. Third instar water bug nymph, Diplonychus rusticus F., released in BLI almost totally consumed the developing mosquito larvae and resulted in 99% reduction in mosquito pupal development. The species of mosquitoes monitored throughout the study were A. aegypti. Results showed that in the presence of bamboo leaf infusion, about 92% of the gravid dengue mosquito adults are attracted to lay their eggs in this organic attractant and the subsequent release of water bug prevented pupal development by 99%. Therefore, the use of oviposition attractant and subsequent release of water bug predators could be a novel approach in directly reducing the A. aegypti population.

Source or Periodical Title

The Philippine Entomologist

ISSN

0048-3753

Volume

30

Issue

2

Page

174

Document Type

Article

Frequency

semi-annually

Language

English

En – AGROVOC descriptors

CULICIDAE; BAMBOOS; PEST OF PLANTS; LEAVES; SPECIES; FIELD EXPERIMENTATION; OVIPOSITION; ATTRACTANTS; PHILIPPINES

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