- To serve as an important medium for the publication of original research in the field of medical science and health research, thus filling gaps in health knowledge for effective utilization of research findings
- To impart current medical knowledge and updated scientific information obtained from research to health professionals for better and appropriate health care management
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Archives 2006
Myanmar Health Sciences Research Journal
Volume 18, Number 3
TITLE: Effect of neem insecticide on Aedes aegypti larvae in the laboratory.
AUTHOR: Htin Zaw Soe; W.Tun Lin; Sein Min; Saw Lwin
SOURCE: Myanmar Health Sciences Research Journal. 2006; 18(3): 150-154
ABSTRACT: Prospective controlled laboratory trials were conducted to determine the effect of neem insecticide (a.i. azadirachtin 0.75% SC) on third and fourth instars of Aedes aegypti larvae using six different concentrations (aza 0.0002% to 0.0064%) in accordance with WHO instructions on larval susceptibility test. These trials were performed in Health and Disease Control Unit, Mingaladon in September, 2001 and included six replicates, each consisting of total number of 150 larvae. It was found that the larvae were highly susceptible to aza and LC50 and LC90 were 0.00038% and 0.00087% respectively. The residual effect of insecticide was calculated applying the insecticide stock solution (aza 0.15%) of shelf-life day 1, 2, 3, 7 and 10 and it normally persisted for three days. Optimal concentration 0.0016% had the efficacy for seven days. The local product neem insecticide was found to be effective against Ae. aegypti, non-toxic to human and environment, easily available and cheap. Therefore, neem insecticide was found to be very promising to be used effectively in the field in treatment of miscellaneous water containers such as discarded unused tires, batteries, tins, coconut shells etc. – well-breeding sources of the vectors Ae. aegypti responsible for occurrence of dengue haemorrhagic fever.
SUBJECT HEADINGS: Insecticides. Aedes. Larva.
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