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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Korean Journal of Environmental Agriculture
Journal Basic Information
Journal DOI :
The Korean Society of Environmental Agriculture
Editor in Chief :
Volume & Issues
Volume 3, Issue 2 - Dec 1984
Volume 3, Issue 1 - Jun 1984
Selecting the target year
Effects of Pesticide Formulations on the Residues in Paddy Rice
Oh, Byung-Youl ; Kim, Young-Ku ; Park, Young-Sun ;
Korean Journal of Environmental Agriculture, volume 3, issue 2, 1984, Pages 1~8
The present study was performed to elucidate pesticide residues in paddy rice applied with different application schedules and frequencies of pesticide formulations. Pungsanbyeo(
) of rice(Oryza sativa L.) was chosen as target crop. Isoprothiolane(diisopropyl-l,3-dithiolan-2-ylidene malonate) 40EC (emulsifiable concentrates), 12G (granular), and chlorpyriphosmethyl [0,0-dimethyl 0-(3,5,6-trichloro-2-pyridyl) phosphorothioate] 25EC, 3G were selected as pesticide formulations. The closer the isoprothiolane EC application to harvest, the higher the residues in rice straw retained at harvest; however the G application on 30 days before harvest resulted in highest residue. Chlorpyriphosmethyl residues were higher as it was applied nearby to harvest. Degradation rate of chlorpyriphos-methyl in husked rice was quite similar to in rice straw, on the other hand isoprothiolane in the rice was more stable than that in rice straw. Translocated amount of applied G formulation to husked rice was meager irrespective to the chemicals. Percent reduction of isoprothiolane residues in husked rice by polishing was not related to application frequencies but to application date before harvest. Residual portions in rice straw, husked rice and polished rice of total input amount during rice cultivation were ranged from 0.19% to 0.99%, 0.01% to 0.48%, and 0.15%, respectively.
Release of Carbofuran from Granular Formulations in Water and Its Degradation Patterns in Soils
Hong, Moo-Ki ; Hong, Jong-Uck ;
Korean Journal of Environmental Agriculture, volume 3, issue 2, 1984, Pages 9~15
Experiments were carried out with purified technical grade and two types of impregnated and sand-coated granules of carbofuran, in order to investigate the release patterns in water and the persistence of this chemical in soils. The results obtained are summarized as follows: 1) As regards to release velocity in water, impregnated granule was found to be faster than sand-coated granule. The time to reach maximum concentrations of carbofuran in water from technical carbofuran, impregnated granule and sand-coated granule was 0.5, 3 and 5 days, respectively. 2) Degradation rate of carbofuran in soils decreased in the order of technical carbofuran, impregnated granule, sand-coated granule regardless of soil types and application rates. Degradation of carbofuran in flooded soil was faster than in non-flooded soil. Soil flooding appeared to be the main factor in promoting the degradation of carbofuran in the soil. 3) When carbofuran was fortified in soils in the form of technical carbofuran, impregnated granule or sand-coated granule, the persistencies of two terminal residues of carbofuran, that is, 3-hydroxy carbofuran and 3-keto carbofuran decreased in the order of sand-coated granule, impregnated granule and technical form.
Degradation of Dinobuton in Soil and Solution
Hong, Jong-Uck ; Kim, Jung-Ho ;
Korean Journal of Environmental Agriculture, volume 3, issue 2, 1984, Pages 16~22
This study was carried out to investigate the stability of dinobuton (2-sec-butyl-4,6-dinitrophenyl isopropyl carbonate) in distilled water and buffer solutions and its persistence in soils. When dinobuton was incubated at
in distilled water, the half-lives of dinobuton was 28 and 6 days, respectively. The decomposition of dinobuton was, therefore, faster at high temperature than at low temperature. The half-life of dinobuton was about 27 days in the acidic solution
, whereas 10 and 4 days in the alkaline solutions of pH 9, and 10, respectively. Thus dinobuton was stable in acidic solution, and unstable in alkaline solution. Dinoseb (2-sec-butyl-4,6-dinitrophenol), which is produced in the degradation process of dinobuton, was produced in small amounts in distilled water and buffer solutions. The half-life of dinobuton in sterilized soil was about 16 days longer than in non-sterilized soil. Dinoseb was also more persistent in sterilized soil than in non-sterilized one.
Evaluation of Organochlorine Pesticide Residues in Soil by Steam Distillation
Suh, Yong-Tack ; Shim, Jae-Han ; Park, Ro-Dong ;
Korean Journal of Environmental Agriculture, volume 3, issue 2, 1984, Pages 23~29
Agricultural soil samples collected from 121 sites (plastic film house 59, up-land 30 and orchard 32 sites) were evaluated by steam distillation and GLC-ECD analysis for organochlorine pesticides (
, heptachlor, p,p'-DDE, dieldrin, p,p'-DDD, and p,p'-DDT) in Jeollanam-Do area. Total residues of organochlorine pesticide in orchard, plastic film house and up-land were 0.415, 0.234 and 0.156ppm, respectively. Ninety-four percent of total residue was p,p'-DDT and its homologues (p,p'-DDE and p,p'-DDD).
was detected in all soil samples at
range. Residue levels of organochlorine pesticide increased in the order of p,p'-DDE,
, heptachlor, dieldrin, p,p'-DDT and p,p'-DDD.
Organophosphorus Insecticide Residues in Fruits and Vegetables
Suh, Y.S ; Rhu, H.I. ; Kim, I.K. ; Kim, H.Y. ; Jun, S.H. ;
Korean Journal of Environmental Agriculture, volume 3, issue 2, 1984, Pages 30~36
This study was to investigate the organophosphorus insecticide residues in crops including five kinds of vegetables and two kinds of fruits. The pesticides investigated in spring-radish, spring Chinese cabbage, cucumber and tomato were diazinon, DEP and malathion, in unripe pepper EPN and PAP, in peach EPN, parathion and demeton-methyl, and in grape EPN, PAP and MEP. All samples were analysed by gas chromatographic technique with NPD detector. No one sample was found to approach proposed national maximum residue limits in Korea.
Inhibition of Peroxidase and Lipoxygenase by Pesticides
Hwang, In-Young ; Chang, Byeong-Seon ; Park, Kwan-Hwa ; Roh, Jung-Koo ;
Korean Journal of Environmental Agriculture, volume 3, issue 2, 1984, Pages 37~42
The effect on the activities of peroxidase and lipoxygenase by chemicals was determined. Peroxidase activities of horseradish and apple were inhibited strongly by maneb and comparativelyby mancozeb, zineb. The inhibitory rate of enzyme activity was ranged in
by mancozeb, and
by zineb in the level of
at the final concentration. No signification was in the peroxidase activity of apple during ripening between control and plot, treated with 500 ppm mancozeb. On the activity of purified soybean lipoygenase, zineb inhibited it more strongly than carbofuran or phosphamidon, but maneb did not have inhibitory effect on that. The inhibition ranges of
by carbofuran and
by phosphamidon were shown in the final pesticide concentration of
ppm. But in
ppm, lipoxygenase activity was almost inhibited by carbofuran and phosphamidon.
Studies on the Acute Toxicity of an Insecticide Cartap to Several Species of Freshwater Animals
Byun, Sang-Ji ; Choi, Seung-Yoon ; Kim, Gwang-Po ;
Korean Journal of Environmental Agriculture, volume 3, issue 2, 1984, Pages 43~49
The acute toxicity of an insecticide cartap to several species of freshwater animals was evaluated in the laboratory with special reference to the species specificity, effects of water temperatures and pH values. The aquatic animals tested were the Carassius auratus L., Aphyocypris chinensis
, Misgurus anguillicaudatus CANTOR, Moina macrocopa STRAUS. The susceptibility of aquatic animals to cartap was different with the species of animals. At the water temperature of
and pH 7, TLm values of the insecticide to the C. auratus L., A. chinensis G. and M. anguillicaudatus were 0.88, 0.26 and 0.13 ppm in 48 hours, respectively, and to Moina macrocopa S., 306 ppm in 3 hrs. In the case of the three species of fish, TLm 48 values were significantly decreased with rise in temperature. In the case of water flea, where TLm value was 107 ppm at
, there was no consistent response to temperature change, with the highest figure at
than at either 20 or
. and the susceptibility of C.auratus L. and A. chinensis G. greatly decreased with the increase of pH in water. The toxicity to M. anguillicaudatus and M. macrocopa was significantly higher at pH 9 than at pH 6 or 7. In conclusion, the toxicological reactions of the freshwater animals to cartap were variably influenced by the water temperatures and pH values of water and species of animals.
A Study on the Development and Application of Slow Releasing Fertilizer using Korean Natural Clay Minerals-I. Characterization of Korean Natural Clay
Park, Jung-Chul ; Choy, Jin-Ho ; Park, Kuen-Woo ;
Korean Journal of Environmental Agriculture, volume 3, issue 2, 1984, Pages 50~54
For the development of slow releasing K-fertilizer, K-ion exchanged montmorillonite was evaluated and characterized by layer charge determination with n-alkylammonium method. By this method it was possible to discern inhomogenous charge distribution within the crystals and to estimate the upper and lower limit of the layer charge(layer charge limit for Young-il bentonite in Korea:
) and the mean value of interlayer cation exchange capacity of 0.915meq/100g.
The Structure and Function of Agroecosystems
Hyun, Jae-Seon ;
Korean Journal of Environmental Agriculture, volume 3, issue 2, 1984, Pages 55~61
Conservation of Agricultural and Forestry Environment
Ko, Je-Ho ;
Korean Journal of Environmental Agriculture, volume 3, issue 2, 1984, Pages 62~71