A survey on the resistance of Vietnam fleas to some insecticides

Original Article


Korean J Parasitol. 1974 Jun;12(1):1-7. English. Published online Mar 20, 1994. http://dx.doi.org/10.3347/kjp.1974.12.1.1
Copyright © 1974 by The Korean Society for Parasitology


A survey on the resistance of Vietnam fleas to some insecticides
Yong-Tae Yum
Department of Parasitology, College of Medicine, Chung-Ang University, Korea.



Abstract
The results of the tests carried out in 1971 strongly suggested that a considerable portion of the flea population in MR 2 had developed resistance not only against DDT but also malathion and dieldrin. There is also the possibility of the fleas developing a resistance to diazinon and lindane. Thus careful consideration should be given to the continuous use of diazinon. In areas where fleas had developed a resistance to malathion, further tests should be conducted continuously to confirm the possible development of resistance. Other insecticides which have not been used in Vietnam for any purpose should be ready to be substituted, if the development of resistance is confirmed.

Figures


	Fig. 1 Percent Lethal Concentration and Flea Index by Rat Species.


	Fig. 2 LC₅₀ an LC₉₀ of malathion in some area.

Tables


	Table 1 Flea Index by Province in 1971


	Table 2 Percent mortality and LC by Rat Species, Malathion dusting history and flea index


	Table 3 Percent mortality of Fleas after malathion Exposure for One hour


	Table 4 LC of Malathion by Year and Area


	Table 5 Percent mortality of Fleas after Dieldrin Exposure for one hour


	Table 6 Percent of mortality by dusting history (Dieldrin)


	Table 7 LC of Dieldrin by year and by area


	Table 8 Percent of mortality and LC by year (Dieldrin)


	Table 9 Percent mortality of Fleas after D. D. T. exposure for 24 hours


	Table 10 Percent mortality of Fleas after DDT exposure

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