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이제봉(Je-Bong Lee),정미혜(Mi-Hye Jeong),성하정(Ha-Jung Sung),이해근(Hae-Keun Lee),양재설(Jae-sul Yang) 한국농약과학회 2001 농약과학회지 Vol.5 No.4
Tank mixing application of pesticides has been used to reduce labor and to control wide spectrum of pests, but it may cause significant pesticide poisoning on human and animals due to carelessness. The toxic response of pesticides for the tank mixtures and mixtures was investigated to determine acute toxicity and enzymatic change using experimental animals. Acute oral toxicity and acute dermal toxicity were tested by RDA test guideline. The LD?? was calculated by probit analysis method and cholinesterase was measured with automatic analyzer. The toxicities were generally higher than estimated toxicities in tank mixing and mixture. Serum cholinesterase activity was inhibited more than expected at the dose levels of 1/5, 1/10 and 1/20 of LD??. Therefore, the results of this study showed that acute toxicity caused by the pesticide mixtures should be considered before the tank mixing method is applied.
붉은곰팡이병에 감염된 맥류의 실험동물에 대한 안전성 평가
이제봉(Je-Bong Lee),정미혜(Mi-Hye Jeong),성하정(Ha-Jung Sung),이해근(Hae-Keun Lee),오병렬(Byung-Youl Oh) 한국농약과학회 2001 농약과학회지 Vol.5 No.4
In order to investigate the harmful effects of Fusarium, producing mycotoxins, contaminated cereals, two months feeding study was carried out in SPF-ICR mice. Mice diets were incorporated with 30% Fusarium infected wheat, nepal barley or barley. The wheat was processed to flour. The nepal barley and barley were polished by 68% and 58%, respectively. The cereal incorporating amount in mice diet were 0, 10, 30 and 50% for each processed cereal. Five week-old mice were fed with the prepared diet for 2 months. The effects of Fusarium contaminated cereals on the mice were observed after the feeding. The rates of body weight gain, diet and water consumption were not changed. There were no significant changes on hematology, blood biochemistry, gross and histopathological evaluation, organ weights in all treatment groups. These results suggest that the diets have no deleterious effects to ICR mice.
한국산 물벼룩 표준생태독성시험법 확립을 위한 10종 용매대조물질에 대한 독성반응 비교
김병석(Byung-Seok Kim),박연기(Yoen-Ki Park),양유정(Yu-Jung Yang),홍순성(Soon-Sung Hong),박경훈(Kyung-Hun Park),정미혜(Mi-Hye Joeng),김세리(Se-Ri Kim),박경훈(Kyeong Hun Park),예완해(Wan-Hae Yeh),김두호(Doo-Ho Kim),윤종철(Jong-Chul Yun 한국농약과학회 2010 농약과학회지 Vol.14 No.1
Most pesticides are poorly soluble in water and must be dissolved in a solvent carrier before being added to the test medium on aquatic toxicity test. The concentration of solvent is critical to the success of a test. This study were conducted to recommend possible organic solvents which have good solubility for pesticides and low toxicity to Korean native water flea to establish new standard toxicity test methods using Korean native water flea for ecological risk assessment of pesticide. Four Korean freshwater cladocerans, Daphnia obtusa, Daphnia sp., Moina macrocopa and Simocephalus vetulus were exposed to 10 different organic solvents during 48 hours to evaluate their toxic response to solvents. Ethyl acetate was the most toxic to cladocerans tested. Although ethyl ether was the least toxic to cladocerans tested, it may not adequate as possible solvent in aquatic toxicity test due to high volatility and low water solubility. In conclusion, acetone, methanol, ethanol and acetonitrile which has low toxicity as well as good water solubility are recommended as optimal organic solvent to use in aquatic toxicity tests with Korean native cladocerans tested.
2종의 수서곤충 Chironomus riparius와 Cloeon dipterum의 유충 성장단계별 molinate 급성독성 비교
김병석(Byung-Seok Kim),박연기(Yoen-Ki Park),홍순성(Soon-Sung Hong),양유정(Yu-Jung Yang),박경훈(Kyung-Hun Park),정미혜(Mi-Hye Joeng),김세리(Se-Ri Kim),박경훈(Kyeong Hun Park),예완해(Wan-Hae Yeh),김두호(Doo-Ho Kim),홍무기(Moo-Ki Hong) 한국농약과학회 2009 농약과학회지 Vol.13 No.4
Molinate (S-ethyl hexahydro-1H-azepine-1-carbothioate), a selective, preemergence thiocarbamate herbicide used for grass weed control in rice fields, is being most widely used in Korea. This study was conducted to assess the comparative toxicity of molinate on two aquatic insects, Chironomus riparius and Cloeon dipterum in four larval stages. First-instar larvae of C. riparius appeared to be the most sensitive to acute exposure of molinate with a 48-h EC<SUB>50</SUB> of 7.8 ㎎/L, followed by third instar (48-h EC<SUB>50</SUB> = 22.9 ㎎/L), second instar (48-h EC<SUB>50</SUB> = 25.0 ㎎/L) and fourth instar (48-h EC<SUB>50</SUB> > 50 ㎎/L) larvae. Also, the sensitivity of the larvae of C. dipterum was presented as the same manner of the larvae of C. riparius. The youngest group of larvae of C. riparius appeared to be the most sensitive to molinate, with 96-h EC<SUB>50</SUB> values ranged from 14.3 to 24.1 ㎎/L. The authors assume that the young instar lavae of aquatic insects, Chironomus riparius and Cloeon dipterum are more sensitive to molinate. Also, the authors propose that Mayfly, Cloeon dipterum is well suited as a bioassay organism because it is one of the most vulnerable aquatic insects inhabiting agricultural ecosystem in Korea.