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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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The Korean Journal of Pesticide Science
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Journal DOI :
The Korean Society of Pesticide Science
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Volume & Issues
Volume 12, Issue 4 - Dec 2008
Volume 12, Issue 3 - Sep 2008
Volume 12, Issue 2 - Jun 2008
Volume 12, Issue 1 - Mar 2008
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Synthesis and Herbicidal Activity of New 1-(4-chloro-2-fluoro-5-propargyloxyphenyl)-3-thiourea Derivatives
Park, Kwaun-Yong ; Song, Jong-Hwan ; Jeon, Dong-Ju ; Soung, Min-Gyu ; Sung, Nack-Do ;
The Korean Journal of Pesticide Science, volume 12, issue 2, 2008, Pages 103~110
To develop the third generation herbicidal cyclic imide (Cyl) derivatives, the new 1-(4-chloro-2-fluoro-5-propargyloxyphenyl)-3-thiourea derivatives were synthesized and measured their herbicidal activities (
) in vivo (preemergence) against rice plant (Orysa Sativa) and barnyard grass (Echinochlor crus-galli). The synthetic yields (%) of aryl derivatives (21-40) in general was higher than that of alkyl derivatives (1-20). In case of alkyl derivatives, the synthetic yield depended on the structural forms of alkyl amine groups. From the results of correlation analysis between herbicidal activities and substituents, the compound 8 and 24 showed the highest herbicidal activity against the shoot and root of barnyard grass. Especially, the compounds 11 and 6 showed the selective herbicidal activities between rice plant and barnyard grass.
CoMFA Analyses on the Fungicidal Activity with N-phenylbenzensulfonamide Analogues against Gray Mold (Botrytis cinerea)
Hwang, Tae-Yeon ; Kang, Kyu-Young ; Sung, Nack-Do ;
The Korean Journal of Pesticide Science, volume 12, issue 2, 2008, Pages 111~117
The comparative molecular field analysis (CoMFA) for the fungicidal activity with N-phenylbenzenesulfonamide analogues (1-45) against gray mold (Botriyts cinerea) were studied quantitatively. The statistical values of CoMFA models had much better predictability and fitness than those of comparative molecular similarity indices analysis (CoMSIA) models. The statistical values of the optimized CoMFA I model were predictablity,
and correlation coefficient,
, and their fungicidal activity was dependent on the steric field (52%) and electrostatic field (35.6%) of the substrate molecules. And also, it was found that the optimized CoMFA I model with the sensitivity to perturbation (
) and prediction (
& SDEP=0.614) produced by a progressive scrambling analysis was not dependent on chance correlation. From the results of graphical analyses on the contour maps with the optimized CoMFA I model, it is expected that the
-substituents on the N-phenyl ring as steric favor group and para-substituents (
) on the S-phenyl ring as steric disfavor group will contribute to the fungicidal activity. Therefore, the optimized CoMFA I model should be applicable to the prediction of the fungicidal activities against gray mold.
Factors Influencing the Foliar Uptake of Dimethomorph into Cucumber Induced by Fatty Alcohol Ethoxylate
Yu, Ju-Hyun ;
The Korean Journal of Pesticide Science, volume 12, issue 2, 2008, Pages 118~126
In order to find the best compositions of the dimethomorph formulation containing fatty alcohol ethoxylate surfactants as an activator adjuvant and recommend the good management way of the formulations to allow an intended uptake rate, factors affecting foliar uptake of active ingredients into cucumber were investigated and compared each other. Among tested, the most important factors were air temperature in which plants were located after spraying of aqueous formulations containing activator adjuvant, and deposit of wax on the leaf surface of cucumber. Dimethomorph uptake was found to be increased by sunlight. When aqueous formulations had long-polyethoxylated fatty alcohol surfactants, the relative humidity of the room in which the plants were located after spraying with the formulations did not severely influence the foliar uptake. Maintaining a mild temperature and avoiding too strong sunlight after spraying with dimethomorph formulations were found to be resonable management strategies.
Mechanism of Action of Fatty Alcohol Ethoxylate on Foliar Penetration of Dimethomorph into Cucumber
Yu, Ju-Hyun ;
The Korean Journal of Pesticide Science, volume 12, issue 2, 2008, Pages 127~133
The foliar uptake of dimethomorph into cucumber was assessed by spray application of aqueous dimethomorph solution containing fatty alcohol ethoxylate (FAE) or fatty acid alkyl ester as activator adjuvants. Afterward, the possible mechanism of action of FAE on foliar penetration of active ingredient was suggested by speculating on the effect of lipophile and hydrophile of FAEs. The amount of absorbed dimethomorph induced by polyoxyethylene mono-9-octadecenyl ether (6 moles ethylene oxide,
) was linearly related to the concentrations of surfactant as well as dimethomorph in spray solution, suggesting that it is simply a diffusion phenomenon of the solute molecule through a cuticular membrane from leaf surface. Octadecanol attached to FAE was most effective lipophile on the leaf penetration of dimethomorph. And, the more ethylene oxide had the polyoxyethylene chain of FAE up to 20 moles, the higher the uptake rate was. Therefore, the role of lipophile of FAE on dimethomorph penetration to cucumber leaf, probably, is to modify the physico-chemical properties of cuticular membrane to be permeable to dimethomorph, and the polyoxyethylene chain having less than 20 moles ethylene oxide, which is moderately permeable to cuticular membrane by its molar volume, is to let the physically-modified cuticular membrane to be maintained for a longtime.
Examination of Pesticide Poisoning Deaths Statistics in Korea and Precautionary Measures Against Pesticide-Poisoning
Jeong, Mi-Hye ; Kim, Jin-Hwa ; Park, Kyung-Hun ; Lee, Hee-Dong ; You, Are-Sun ; Kim, Byung-Seok ; Choi, Ju-Hyun ; Kwon, Oh-Kyung ;
The Korean Journal of Pesticide Science, volume 12, issue 2, 2008, Pages 134~140
The data on pesticide poisoning death toll during 2000-2005 was obtained from Korean National Statistical Office and analysed to find out any precautionary measures against pesticide poisonings. Pesticide poisoning death toll showed slightly increasing trend with year up to about 3500 in 2005. Most of the pesticide poisoning death cases were intentional self-poisoning accounting for more than 80% of total pesticide poisoning death. The pesticide most often implicated in poisoning death were paraquat dichloride, a non-selective herbicide and organophosphate/carbamate insecticides. The regional distribution of pesticide poisoning death showed urban 21.6% and rural area 78.4%. As for the occupation of the dead, agricultural, forestry and fishery workers accounted for 27.4% and non-agricultural workers was 72.6% of pesticide poisoning death. Therefore, government need to take some precautionary measures to reduce the number of pesticide poisoning cases. It is strongly recommended that pesticide regulatory authorities encourage and train the agricultural workers to use safe storage boxes and enforce strict regulation for the prevention for the prevention of highly toxic pesticides sales to non-agricultural workers.
Application of Oral Acute Toxic Class Method and Globally Harmonized Classification System on Pesticide
Jeong, Mi-Hye ; You, Are-Sun ; Park, Kyung-Hun ; Kim, Byung-Seok ; Lee, Hee-Dong ; Lee, Jae-Bong ; Kwon, Oh-Kyung ;
The Korean Journal of Pesticide Science, volume 12, issue 2, 2008, Pages 141~147
Globally Harmonized System (GHS) for classification and labelling will provide an internationally agreed hazard classification system of chemical products and for communication of those hazards. This study aimed for establishment of the oral acute toxic class (ATC) method and application of GHS on pesticides. The ATC method was developed for determining
estimates of chemical substances with significantly fewer animals than needed when applying conventional
tests. We carried out
test and ATC test on 13 pesticides, Although methidathion EC and parathion-ethyl EC showed significantly different in
test and ATC method, there are no difference in toxicity class by GHS. Both tests on the other pesticides showed almost equal results and toxicity class by GHS. Therefore, this study indicated high possibility of application of ATC method and GHS on pesticides.
Residual Characteristics of Lambda-cyhalothrin and Deltamethrin in Lettuce
Yun, Sang-Soon ; Shim, Seok-Won ; Kim, Kwang-Ill ; Ahn, Myung-Soo ; Youn, Teak-Han ; Kim, Yun-Jeong ; Hwang, Hyo-Seon ; Jin, Chung-Woo ; Han, Sang-Kuk ; Oh, Sang-Kyun ; Shin, Jong-Ho ; Jin, Yong-Duk ; Lee, Eun-Young ;
The Korean Journal of Pesticide Science, volume 12, issue 2, 2008, Pages 148~154
This study was carried out to investigate the residue patterns of two insecticides, lambda-cyhalothrin and deltamethrin, commonly used for lettuce, under greenhouse conditions. The pesticides were sprayed with dilution of recommended and doubled doses onto lettuce. Their detection limits were
and mean recoveries at the fortification levels of 0.2 and
were from 101.17 to 104.25 and from 99.70 to 103.77%, respectively. The pesticides were gradually decreased in lettuce with time. Biological half-lives of lambda-cyhalothrin and deltamethrin were 1.7 and 1.4 days at the recommended dose and 1.8 and 1.4 days at the doubled dose, respectively. Initial residue amounts of lambda-cyhalothrin and deltamethrin at the recommended and doubled doses exceeded their MRLs. However, the residue levels of the pesticides in the crop sampled at harvest were less than their MRLs. The ratios of the estimated daily intake (EDI) to acceptable daily intake (ADI) by intake the crop harvested 10 days after spraying were less than 1% of their ADIs.
Inhibition of Meloidogyne incognita Egg Hatching by Herbal Extracts
Elbadri, G.A.A. ; Lee, Dong-Woon ; Park, Jung-Chan ; Choo, Ho-Yul ; Kim, Hyeong-Hwan ;
The Korean Journal of Pesticide Science, volume 12, issue 2, 2008, Pages 155~161
The inhibitory effect of herbal extracts using methanol and hexane collected from Sudan and Korea was evaluated on egg hatching of Meloidogyne incognita. The concentration of herbal extracts were 10,000, 1,000 and 100 ppm, respectively. They were treated to Meloidogyne incognita eggs after 3, 7, and 21 days of hatching. All herbal extracts inhibited egg hatching significantly compared to the control. The degree of inhibition was directly related to the concentration of the extracts. At 10,000 ppm, very fewer individuals were hatched at all the periods of exposure with the exception of the extract of fruits of Quisqalis indica which gave 84.4 and 54.5% at 7 and 21 days, respectively. Egg hatching was completely ceased, especially after 7 days for most of the extracts. While at 1,000 ppm relatively high numbers of eggs were hatched compared to the higher concentration, as well the extracts Q. indica reported many number of hatched eggs compared to others, especially at 21 days. On the other hand, the extract from pods of Cucumis mello var agrestis gave the least hatching number of eggs at all periods of exposure which gave 2, 8, and 3% at 3, 7, and 21 days, respectively in comparison to the control. Whereas at 100 ppm, inhibition increased with exposure time. However, the extract leaf of Desmodium caudatum represented the fewer hatching eggs at 3 and 7 days.
Effective Control in Managing German Cockroach, Blattella germanica (Orthoptera: Blatellidae) Using a Push-Pull Strategy
Yang, Jeong-Oh ; Kim, Sang-Woo ; Noh, Doo-Jin ; Yoon, Chang-Mann ; Kang, Shin-Ho ; Kim, Gil-Hah ;
The Korean Journal of Pesticide Science, volume 12, issue 2, 2008, Pages 162~167
To enhance the control efficacy against cockroaches in dwelling space, repellent ("Push") was set down on one comer and a poison bait including attractant ("Pull") was on the opposite side. And we tested the control efficacy of Push-Pull strategy by behavior-stimuli of cockroaches. In a mini-field test, German cockroach males primarily chose shelters nearest to the attractant-treated surfaces and farthest from the repellent-treated surfaces. The consumption of food or bait was also highest from food nearest to the preferred shelters by push-pull effect. We evaluated the push-pull insecticidal efficacies of five essential oils belong to Citrus plant, namely, grapefruit, lemon, lime, orange, and petitgrain. The combined push-pull treatments appeared to be faster and higher insecticidal effects than single (pull) treatment, and the repellent efficacy of Citrus oils was in the order of grapefruit > lemon > lime > orange > petitgrain. Therefore, we propose the effective control of the german cockroach using Citrus oils as repellents and push-pull method into a limited area.
The Controlling Activity of Several Fungicides against Rice Bakanae Disease Caused by Fusarium fujikuroi in Five Assay Methods
Shin, Myeong-Uk ; Lee, Su-Min ; Lee, Yong-Hwan ; Kang, Hyo-Jung ; Kim, Heung-Tae ;
The Korean Journal of Pesticide Science, volume 12, issue 2, 2008, Pages 168~176
Recently damage of rice bakanae disease disseminated by infected seeds increased in paddy field in Korea. For controlling rice bakanae disease, the efficacy of 17 fungicides was assessed by 5 kinds of bioassay, spore germination test (SGT), mycelial growth test, detection test on Komada's medium (KDT), pouch test (PT) and greenhouse test (GT). Among ergosterol biosynthesis inhibiting fungicides, prochloraz showed a high controlling activity in all the assay systems while the others showed very low activity except for
of hexaconazole in GT and
of triflumizole in KDT. Although benomyl and the mixture of benomyl and thiram showed a good activity at 100 and
in SGT and PT, respectively, in GT they did a middle activity. Trifloxystrobin and kresoxim-methyl included in strobilurins showed a good activity even at
in KDT as well as a middle activity in SGT. Also a high activity not only at
in SGT but also at
KDT was detected in thiram. The activity of fludioxonil was confirmed in SGT, KDT and PT. Based on these results, it is very important to determine a bioassay system, because the fungicidal activity against rice bakanae disease was fluctuated depending on a assay systems as well as the mechanism of fungicide.
Selection of Low Toxic Pesticides to Microplites mediator
Choi, Byeong-Ryeol ; Kwon, Min ; Lee, Si-Woo ; Park, Hyung-Man ;
The Korean Journal of Pesticide Science, volume 12, issue 2, 2008, Pages 177~183
For the development of integrated pest management system by harmonizing biological and chemical control, some experiments were carried out to select low toxic pesticides against natural enemies. Leaf dipping method, body dipping method, and diet treatment method were used for the toxicity evaluation against Microplites mediator adults. We tested 49 different pesticides (34 insecticides, 11 fungicides, 4 herbicides) at recommending concentration commonly used to control insect pests, disease and up-land weeds in chinese cabbage field. 16 insecticides, 11 fungicides, and 4 herbicides were shown to be low toxic to Microplites mediator adults in the treatment of body dipping.
Immunosuppressive Activity of Cultured Broth of Entompathogenic Bacteria on the Beet Armyworm, Spodoptera exigua, and Their Mixture Effects with Bt Biopesticide on Insecticidal Pathogencity
Kim, Jea-Min ; Nalini, Madanagopal ; Kim, Yong-Gyun ;
The Korean Journal of Pesticide Science, volume 12, issue 2, 2008, Pages 184~191
Entomopathogenic bacteria (Xenorhabdus nematophila, X. sp. and Photorhabdus temperata subsp. temperata) isolated from entomopathogenic nematodes express potent insecticidal activity in insect hemocoel. They are also known to suppress insect immune mediation by inhibiting phospholipase
, leading to host immunosuppression. This study analyzed effects of their cultured broths on inhibiting insect immunosuppression. For this, we removed all bacterial cells using
pore sized membrane from the bacteria-cultured broth. All three sterilized cultured media, in dose-dependent manners, significantly inhibited hemocyte-spreading behavior of 5th instar larvae of Spodoptera exigua. However, they showed differential inhibitory activities among different bacterial species, in which X. nematophila showed the most potent inhibitory activity. This immunosuppressive effect was applied to increase the pathogenicity of Bacillus thuringiensis (Bt). All three bacterial cultured broths including bacterial cells significantly potentiated Bt pathogenicity against young S. exigua larvae when each of them was orally administered in a mixture of low dose of Bt. Finally, we tested the effect of oral administration of the cultured media containing the immunosuppressive compound(s) secreted by the bacteria. The membrane-sterilized cultured broths were mixed with the low dose of Bt and then orally administered to the young S. exigua. Only the cultured medium of X. nematophila showed increase of Bt pathogenicity. These results indicated that the; cultured media of the three bacteria possessed immunosuppressive factor(s), which may act to potentiate Bt toxicity to young S. exigua larvae.
Acaricidal Activity of A Newly Synthesized K16776 against Honeybee Mite, Varroa destructor (Acari: Varroidae)
Oh, Man-Gyun ; Ahn, Hee-Geun ; Kim, Hyun-Kyung ; Yoon, Chang-Mann ; Kim, Jin-Ju ; Kim, Tae-Joon ; Lee, Dong-Guk ; Chung, Geun-Hoe ; Kim, Gil-Hah ;
The Korean Journal of Pesticide Science, volume 12, issue 2, 2008, Pages 192~196
This study examined the acaricidal activity of a new compound, K16776 against honeybee mite, Varroa destructor which is ecto-parasite of Apis mellifera. Acaricidal activity was performed using six acaricides, two Chinese commercial acaricides and one newly synthesized K16776 against V. destructor in the small container and in the bee hive. K16776 and amitraz exhibited 100% acaricidal activity against V. destructor without insecticidal toxicity to A. mellifera in the small container. The other acaricide was not activity. Applied to the bee hives, K16776 showed acaricidal activity as 98.7% (
) and 88.6% (
) and amitraz showed as 100% (
) and 90% (
), respectively. Made in China, Cao Suan Sha Man Pian and Wangs showed acaricidal activity as 56.9% and 66.7%, respectively. The result indicates that K16776 can be potentially useful control agent against honeybee mite, V. destructor.
Synthesis and Herbicidal Activities of 5-benzyloxymethyl-3-(thiophen-4-yl)-1,2-isoxazoline derivatives
Song, Jong-Hwan ; Jeon, Dong-Ju ;
The Korean Journal of Pesticide Science, volume 12, issue 2, 2008, Pages 197~200
Novel series of 5-benzyloxymethyl-3-(thiophen-5-yl)-1,2-isoxazoline derivatives were designed and synthesized, and their herbicidal activities to diverse weeds were tested under flooded paddy conditions in a greenhouse. Among them, some compounds (3d-f) showed good activities to dominant weeds such as Echinocloa orizycola and Monochoria vaginalis presl. at a rate of 0.063 kg/ha without the serious injury toward rice.
Synthesis and Herbicidal Activities of Tetrahydroindazole Derivatives Possessing Hydroxyalkyl Subgroup
Ko, Young-Kwan ; Chung, Kun-Hoe ; Ryu, Jae-Wook ; Woo, Jae-Chun ; Koo, Dong-Wan ; Choi, Jung-Sup ; Kim, Jun-Young ; Kim, Su-Ho ; Kim, Tae-Joon ; Choi, In-Young ; Seok, Mee-Young ; Choi, Jun-Hyuk ; Chung, Bong-Jin ;
The Korean Journal of Pesticide Science, volume 12, issue 2, 2008, Pages 201~205
As an ongoing research program for the development of environmental friendly new soil-surface treatment herbicide, several tetrahydroindazole derivatives 6a - 6h possessing hydroxyalkyl subgroup were synthesized and shown to have interesting herbicidal activities exhibiting sumptoms as protoporphyrinogen IX oxidase inhibitor under pre-emergence upland greenhouse screening. Among derivatives tested, compound 6f showed superior herbicidal activity against problem weeds.