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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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The Korean Journal of Pesticide Science
Journal Basic Information
Journal DOI :
The Korean Society of Pesticide Science
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Volume & Issues
Volume 11, Issue 4 - Dec 2007
Volume 11, Issue 3 - Sep 2007
Volume 11, Issue 2 - Jun 2007
Volume 11, Issue 1 - Mar 2007
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3D-QSAR Analysis on the Insecticidal Activities of N-Substituents on Imidazol Ring in Imidacloprid Analogues
Soung, Min-Gyu ; Kim, Se-Gon ; Soog, Nack-Do ;
The Korean Journal of Pesticide Science, volume 11, issue 3, 2007, Pages 131~137
CoMFA and CoMSIA model were derived and reviewed on the insecticidal activities of N-substituents (X) on the imidazol ring in imidacloprid analogues at the different alignment condition. Regarding the predictability (
) and fitness (
) of the two optimized models, the atom based fit (A) alignments were better than that of the field fit (F) alignment and, on the other hand, CoMSIA (A10) model was better than CoMFA (A5) model. Also, from the most optimized CoMSIA (A10) model, the insecticidal activity by N-substituents (X) was dependence on the electrostatic field and H-bond acceptor field. It is predicted that, from the contour maps with optimized CoMSIA (A10) model, H-bond acceptors at ortho- and meta- position will contribute for improving of insecticidal activities and, as the functional groups of carbonyl oxygen atom are charged negatively and positively charged at the ortho- position of benzyl group, insecticidal activities will also be improved.
CoMFA and CoMSIA Analysis on the Selective Fungicidal Activity of N-phenyl-D-phenylthionocarbamate Analogues against Resistant and Sensitive Gray Mold (Botrytis cinerea)
Soung, Min-Gyu ; Sung, Nack-Do ;
The Korean Journal of Pesticide Science, volume 11, issue 3, 2007, Pages 138~143
The relationships between three dimensional quantitative structure and activity relationships (3D-QSARs) for the selective fungicidal function between N-phenyl substituents of N-phenyl-O-phenyl-thionocarbamate derivatives analogues and their the fungicidal activities against resistant (RBC) and sensitive (SBC) gray mold (Botrytis cinerea) were studied quantitatively using CoMFA and CoMSIA methods. The statistical values of optimized CoMSIA (M7) model were better (
) than that of CoMFA (M5) model. And the factor influencing of the selective between the fungicidal activity against RBC and SBC was dependent on electrostatic field of CoMFA (M5) model. Therefore, it is predicted that, from the CoMSIA contour maps of CoMSIA (M7) model, the selectivity will be improved by the H-bond donor that is with negatively charged favored group at meta-position on the N-phenyl ring.
Evaluation of Groundwater Contamination Potential of Pesticides Using Groundwater Ubiquity Score in Jeju Island Soils
Hyun, Hae-Nam ; Jang, Gong-Man ; Oh, Sang-Sil ; Chung, Jong-Bae ;
The Korean Journal of Pesticide Science, volume 11, issue 3, 2007, Pages 144~153
One of the most recent issues facing the pesticides regulatory process is the assessment of the potential for pesticides to leach through soil and appear in groundwater. Since Jeju island depends on a hydrogeologically vulnerable aquifer system as its principle source of drinking water, it is important to identify which pesticides are the most likely to result in groundwater contamination. The objective of this study was to assess groundwater contamination risk of 21 pesticides (12 insecticides, 6 herbicides and 3 fungicides) in Jeju soils using groundwater ubiquity score (GUS). Considering GUS estimated in 21 representative series of Jeju soils, generally herbicides showed relatively higher leaching potentials and insecticides showed lower leaching potentials. Groundwater contamination risk was higher in the order of bromacil > metolachlor > alachlor > linuron pretilachlor > butachlor for herbicides, carbofuran > ethoprophos > diazinone > dimethoate > penthoate > mecarbam > methidathion > endosulfan > fenitrothion > parathion > chlorpyrifos > terbufos for insecticides, and metalaxyl > chlorothalonil > triadimefon for fungicides. Among the tested pesticides alachlor, metolachlor, bromacil, ethoprophos and carbofuran were classified as the pesticides of very high or high groundwater contamination potential. Although the ranking of the leaching potential was essentially determined on the base of the intrinsic properties of the chemicals and environmental properties, variation of the relative groundwater contamination potentials of each pesticides in different soils were not significant. Therefore, the above ranking of groundwater contamination risk would be applied in most of Jeju soils. To lower the possibility of pesticide contamination of groundwater, the use of those pesticides classified as high or very high leaching potential should be strictly regulated in Jeju Island.
Residual Characteristics of Some Pyrethroid Insecticides in Korean Cabbage
Kim, Dae-Kyu ; Kim, Joo-Kwang ; Lee, Eun-Young ; Park, In-Young ; Noh, Hyun-Ho ; Park, Young-Soon ; Kim, Tae-Hwa ; Jin, Chung-Woo ; Kim, Kwang-Ill ; Yun, Sang-Soon ; Oh, Sang-Kyun ; Kyung, Kee-Sung ;
The Korean Journal of Pesticide Science, volume 11, issue 3, 2007, Pages 154~163
In order to elucidate the residual characteristics of some pyrethroid insecticides commonly used for Korean cabbage, such as bifentbrin, lambda-cyhalothrin and deltametbrin, the test pesticides were sprayed onto the crop at recommended rate and doubled rate of the recommendation. Their detection limits were 0.004 mg
and mean recoveries at the fortification levels of 0.04 and 0.2 mg
were from 95.16 to 99.32 and from 86.81 to 103.73%, respectively. Half-lives were from 2.5 to 3.6 at the recommended rate and from 2.3 to 3.9 days at the doubled rate of the recommendation. Initial residue amounts of bifenthrin and lambda-cyhalothrin at the recommended rate and doubled rate of recommendation and of deltamethrin at the recommended rate were less than their MRL, whereas, in case of deltamethrin sprayed at doubled rate of the recommendation, the residue level exceeded its MRL. However, the residue levels of the pesticides in the crop sampled at harvest were less than their maximum residue levels and the ratios of the estimated daily intake (EDI) to acceptable daily intake (ADI) for the pesticides tested calculated from the residue data at harvest were less than 7%, suggesting that these pesticides would be safe for Korean cabbage from the residue concern
Pyriproxyfen Inhibits Hemocytic Phagocytosis of the Beet Armyworm, Spodoptera exigua
Madanagopal, Nalini ; Lee, Yong-Joon ; Kim, Yong-Gyun ;
The Korean Journal of Pesticide Science, volume 11, issue 3, 2007, Pages 164~170
The concept of innate immunity in insects which refers to the first line of host defense constitutes the humoral and cellular components which are involved in recognition and actively participate in the elimination of the intruding foreign micro- or macro-organisms. Several recent studies suggest that juvenile hormone (JH) modulates the cellular immune reactions in response to pathogen. In this study, pyriproxyfen (a JH agonist as an insect growth regulator) was tested in its any inhibitory effect on the immune reactions of the beet armyworm, Spodoptera exigua. To this end, five different hemocyte morphotypes of final instar S. exigua were identified by phase contrast microscopy. Plasmatocytes and granular cells, which constitute about 90% of the total hemocyte count, were prominently distinguished based on their basophilic/acidophilic nature using Giemsa stain. The role of pyriproxyfen on the functional ability of hemocytes was analyzed using FITC-labeled Providencia vermicola for the phagocytic potential of the hemocytes. Both granular cells and plasmatocytes exhibited phagocytosis behavior. Pyriproxyfen significantly inhibited the phagocytosis of both cell types, proposing its novel action as an immunosuppressant.
Changes in Esterase Isozyme Activity after Selective Diets and Insecticides in Monochamus saltuarius (Gebler) Larva
Cho, Sae-Youll ; Kim, Ju-Hyun ; Park, Yong-Chul ;
The Korean Journal of Pesticide Science, volume 11, issue 3, 2007, Pages 171~178
Esterase isozymes were extracted from final instar larvae of M. saltuarius treated with selective diets and inhibitors. Twenty esterase isozymes were separated on 12% native-PAGE gel and stained with three different substrates(
-naphthyl acetate, or
-naphthyl butyrate). Interestingly, the isozymes of Est7(
-naphthyl acetate and
-naphthyl butyrate) and Est6(
-naphthyl acetate) were specifically activated in final instar larvae fed with the bark of Pinus koraiensis. However, we could not find any band from substrate
-naphthyl stearate. The esterase activities of Est3, Est6, and Est7 were inhibited by organophosphate and carbamate insecticides. In addition, The esterase activities of Est4, Est6, and Est7 were also inhibited by eserine. However, inhibition of esterase activities in methoprene, bornyl acetate, linal, cineol, and citral was not observed. However, It is necessary to reconfirm these results in vivo.
Changes in Esterase Isozyme Activity After Pesticides Treatment in Digestive Juice of Monochamus saltuarius (Gebler) Adult
Park, Yong-Chul ; Cho, Sae-Youll ;
The Korean Journal of Pesticide Science, volume 11, issue 3, 2007, Pages 179~185
Esterase isozymes were investigated from digestive juice of M. saltuarius adults after pesticide treatment. Twelve esterase isozymes were separated on 12% native-PAGE gel and stained with three different substrates(
-naphthyl acetate, and
-naphthyl butyrate). Interestingly, the isozyme of Est1(
-naphthyl acetate) was strongly inhibited by the carbofuran and methomyl. The Est1 activity was completely inhibited by the chlorpyrifos and partially inhibited by methidation about 70 %. In addition, eserine suppressed esterase isozyme activities of Est1 about 70% and isozyme activities of Est2, Est3, and Est4 were weakly inhibited.
-pinene did not suppressed esterase isozyme activities but activities of esterases were very weakly inhibited in camphor and bornyl acetate.
Characteristics and control activity of copper hydroxide against pepper Phytophthora blight caused by Phytophthora capsici
Kim, Sun-Bo ; Min, Gi-Young ; Kim, Joo-Heong ; Shin, Myeong-Wook ; Kim, Myeong-Ki ; Yeon, Cho-Rhong ; Kim, Heung-Tae ;
The Korean Journal of Pesticide Science, volume 11, issue 3, 2007, Pages 186~193
Characteristics and control activity of copper hydroxide against pepper phytophthora blight caused by Phytophthora capsici were investigated in a greenhouse and a pepper field Copper hydroxide strongly inhibited the germination of zoosporangia and zoospores of P. capsici JHCS 2-5, showing
value by 0.6 and 0.3
. With 1,040
of copper hydroxide in a greenhouse it showed 80% of the control value by soil-drenching application, while 16% by leaf-spraying. However, when it was treated enough to runoff to soil by leaf-spraying application with 50 ml per a pepper plant, it controlled a pepper phytophthora blight by 94.6 % of control value. Copper hydroxide showed a high protective activity at 1 and 3 days before application, while no curative activity. In a field it showed a high activity of 91%, when pepper plants were treated with copper hydorxide 4 times with a intervals of 10 days.
Susceptibility of ussur brown katydid, Paratlanticus ussuriensis (Orthoptera: Tettigoniidae) to commercially registered insecticides
Ahn, Ki-Su ; Yang, Jeong-Oh ; Noh, Doo-Jin ; Yoon, Chang-Mann ; Kim, Young-Jae ; Kim, Gil-Hah ;
The Korean Journal of Pesticide Science, volume 11, issue 3, 2007, Pages 194~200
Insecticidal activity of 33 registered insecticides was tested against last nymphal instars and adults of ussur brown katydid (Paratlanticus ussuriensis). All experiments were tested at the recommended concentration of each insecticides by producer. Acephate, chlorpyrifos, diazinon, EPN and fenitrothion which were organophates, and a mixture combined with chlorpyrifos+
-cypemethrin showed 100% mortality of P. ussuriensis. But fipronil showed only 100% mortality in leaf-dipping method. Carbamates insecticidal groups, benfuracarb and furathiocarb were showed over 80% and phenthoate was
in mortality of P. ussuriensis. Among the mixture, etofenprox+diazinon and esfenvalerate+fenitrothion were showed 60-80% against last nymphal instars of P. ussuriensis. Otherwise, acephate, chlorpyrifos, diazinon, EPN and fenitrothion were showed 100% mortality of P. ussuriensis within only 24 hours after treatment, but there was no effective after then in residual tests with leaves.
Characterization of Biopesticides (Bacillus thuringiensis) Produced in Korea
Kil, Mi-Ra ; Kim, Da-A ; Choi, Su-Yeon ; Paek, Seung-Kyoung ; Kim, Jin-Su ; Jin, Da-Yong ; Hwang, In-Chon ; Yu, Yong-Man ;
The Korean Journal of Pesticide Science, volume 11, issue 3, 2007, Pages 201~209
Characteristics of the 5 biopesticides that included Bacillus thuringiensis and on the domestic markets were investigated. These products were contained different strains of B. thuringiensis, for examples; product A and E was B. thuringiensis subsp aizawai; product B was B. thuringiensis; product C was B. thuringiensis Berline var. kurstaki; product D was B. thuringiensis var. kurstaki. Number of active spores were counted because they could influence the bio-activity against target pests. Only product C are contained the fixed quantity as its label, however, product D and E were a tenth part, and product A and B were a hundredth part of their descriptions. The pHs of product A and B were measured 3.67 and 3.73, and C, D and E were 5, respectively. Typical bypyramidal crystals produced from B. thuringiensis was found in only product C under a phase contrast microscope. For the uniform formulation of products that conformed whether B. thuringiensis were equally spreaded on the crops, B. thuringiensis in the C, D and E were equally grown on the nutrient agar medium As a results, product A were more different from product C than any other products. When product A and C were bioassayed against different larval stages of diamondback moth, their mortalities with spraying application were showed 100% after 48 hours.
Survey on Pesticide Use by Ginseng Growers at Gangwon Farmland in Korea
Kang, Hye-Soon ; Park, Dong-Sik ; Hwang, Yun-Kab ; Kim, Song-Mun ;
The Korean Journal of Pesticide Science, volume 11, issue 3, 2007, Pages 210~215
This study aims to investigate if the properly use of pesticide in Ginseng farmland at Gangwon-do, Korea. Questionnaire included 36 questions such as control method for plant diseases, pests and weeds and pattern of pesticide use was answered by 271 Ginseng farmers lived in 4 cities and 8 counties at Gangwon-do. Ginseng farmers have noxious plant diseases, insects and weeds such as leaf spot, anthracnose, snail, stem-mining fly, horseweed and hairy crabgrass. To control of these, 35% of farmers relied on various type of pesticides and 31.5% of farmers used pesticides mingling with natural enemy, microorganism and organic materials. Farmers selected the pesticide based on the their own experiences or by recommendation of market dealers and neighbors, resulting in the use of inappropriate pesticides in the Ginseng farmland(78.8 % ). They followed standard dosage of the pesticide from Handbook of Pesticide Application(96.3%). They, however, used the same pesticides from 2 to 5 years(44.1 %). This consecutive use of pesticide could be induced resistance. This survey resulted that study for pesticide resistance and systematic educational program for proper use and selection of pesticide to Gingseng farmers should be conducted in farmland at Gangwon-do, Korea.