Effects of Some Pesticides on Development of Ascaris suum Eggs
The Korean Journal of Parasitology
;
: 111-115, 2014.
Article
in English
| WPRIM
| ID: wpr-14499
ABSTRACT
To evaluate the effects of pesticides to parasite eggs, Ascaris suum eggs were incubated with 5 different pesticides (11,500-12,000 dilutions of 2% emamectin benzoate, 5% spinetoram, 5% indoxacarb, 1% deltamethrin, and 5% flufenoxuron; all v/v) at 20degrees C 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.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Pesticides
/
Temperature
/
Time
/
Zygote
/
Survival Analysis
/
Ascaris suum
/
Larva
/
Microscopy
Limits:
Animals
Language:
English
Journal:
The Korean Journal of Parasitology
Year:
2014
Type:
Article
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