Mosquiron Larvicidal Trap (MLT): a sensitive attractant zero mosquito pupal trap

Issue Date

10-2014

Abstract

The larvicidal potential and ovipositional effect of an insect growth regulator, Novaluron (Moisquiron), in an oviposition trap or ovitrap on dengue mosquito vectors were determined under field condition. The set-up is hereafter referred to as MLT. This MLT is a modification of an ovitraputilized by De Las Llagas et al. (2007) in all dengue mosquito surveillance and control studies in the Philippines. Variation entails mixing two ppm of an insect growth regulator (2% Novaluron), proven to have an attractant effect in an ovitrap clean water. The study was conducted from July 2012 to June 2013 in Barangay Batong Malake and Barangay San Antonio in Los Baños, Laguna, both known endemic sites for dengue transmission. The MLT traps were installed and serviced every three weeks inside households. Two hundred twenty households per study site were installed with MLT trap. Efficacy of MLT as a surveillance was measured against the conventional inspection of containers with water and the classical ovitrap. The Breteau Index (BI), ovitrap index (OI), and MLT positive for immature mosquito were determined. BI and ovitrap indices are known entomological indicators depicting the level of household infestation. The MLT as an autocidal/larvicidal trap was measured according to its relative attractiveness against containers and ovitrap. Result showed that MLT was more attractive to Aedes for oviposition than ovitrap or other containers inside the house. The proportion of MLT found positive with mosquito was 70% in Batong Malake while the OI was 53%. In San Antonio the MLT was 59% compared to 50% OI. The added Novaluron provides increased attractantcy to female mosquitoes to lay their eggs and has killing effect on the larvae. The findings indicate that MLT is more sensitive than containers and ovitraps as oviposition medium but superiorly lethal to the eggs. Moreover, MLT prevented pupal development, indicating its autocidal activity on larvae. Thus, MLT prevents adult emergence by preventing pupal development. In conclusion, the use of MLT as an integral component of dengue vector control strategy will enhance reduction in the density of the juvenile stages, therefore, lessening dependency on adulticiding efforts. With the threat of dengue vertical and transtadial transmissions in nature, managing the vector at its youngest stage must be done.

Source or Periodical Title

The Philippine Entomologist

ISSN

0048-3753

Volume

28

Issue

2

Page

219-220

Document Type

Article

Frequency

semi-annually

Language

English

En – AGROVOC descriptors

CULIVIDAE; TRAPPING; PEST CONTROL EQUIPMENT; PEST CONTROL BAITS; OVIPOSITION; ATTRACTANT; INFESTATIONS

This document is currently not available here.

Share

COinS