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KMID : 0425120140520010111
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Parasites, Hosts and Diseases
2014 Volume.52 No. 1 p.111 ~ p.115
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Effects of Some Pesticides on Development of Ascaris suum Eggs
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Yu Yong-Man
Kim Jin-Won
Na Won-Seok
Youn Young-Nam
Choi In-Wook
Lee Young-Ha
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Abstract
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To evaluate the effects of pesticides to parasite eggs, Ascaris suum eggs were incubated with 5 different pesticides (1:1,500-1:2,000 dilutions of 2% emamectin benzoate, 5% spinetoram, 5% indoxacarb, 1% deltamethrin, and 5% flufenoxuron; all v/v) at 20℃ for 6 weeks, and microscopically evaluated the egg survival and development on a weekly basis. The survival rate of A. suum eggs incubated in normal saline (control eggs) was 90±3% at 6 weeks. However, the survival rates of eggs treated with pesticides were 75-85% at this time, thus significantly lower than the control value. Larval development in control eggs commenced at 3 weeks, and 73±3% of eggs had internal larvae at 6 weeks. Larvae were evident in pesticide-treated eggs at 3-4 weeks, and the proportions of eggs carrying larvae at 6 weeks (36±3%-54±3%) were significantly lower than that of the control group. Thus, pesticides tested at levels similar to those used in agricultural practices exhibited low-level ovicidal activity and delayed embryogenesis of A. suum eggs, although some differences were evident among the tested pesticides.
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KEYWORD
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Ascaris suum, egg, pesticide, larval development, embryogenesis
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