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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
Editor in Chief :
Volume & Issues
Volume 3, Issue 3 - Dec 1999
Volume 3, Issue 2 - Aug 1999
Volume 3, Issue 1 - May 1999
Selecting the target year
Synthesis and Herbicidal Activity of Novel O-quinolinylamidoxime Derivatives
Song, Jong-Hwan ; Rhie, Soo-Young ; Hong, Kyung-Sik ; Sung, Nack-Do ; Ryu, Eung-K. ;
The Korean Journal of Pesticide Science, volume 3, issue 3, 1999, Pages 1~5
Novel O-quinolinylamidoxime derivatives were prepared by replacement of the carboxylic group at the 8 position of quinclorac with various amidoximes. In the flooded paddy conditions, most of the compounds show good herbicidal activity at a rate of 1 kg/ha. Some of them showed excellent herbicidal activity at a rate of 60 g/ha against barnyardgrass (Echinochloa aryicola) with good selectivity on rice. Under the two-leaf stage of barnyardgrass, most of O-quinolinylamidoximes showed good herbicidal activity, expecially compound 3c which showed excellent herbicidal activity barnyardgrass at a rate of 125 g/ha with good rice seletivity.
Synthesis of new pyridylimidazolinones and their hubicidal effects
Jeon, Dong-Ju ; Chang, Hae-Sung ; Hwang, In-Taek ; Kim, Dae-Whang ;
The Korean Journal of Pesticide Science, volume 3, issue 3, 1999, Pages 6~10
New series of pyridylimidazolinorus substituted with N-(2-hydroxyethyl)-
-dicarbonylamide group, N-ethoxycarbonylthioamide and N-benzoylthioamide group in place of carboxyl group at 3-position of pyridine were prepared, and their herbicidal effects were tested(in vivo) in upland conditions. Most of pyridylimidazolinones substituted with hydroxydiketoamide and N-ethoxycarbonylthioamide group at 3-position of pyridine showed good herbicidal effects at a rate of 250 g/ha, while pyridylimidazolinone substituted with N-benzoylthioamide group showed no herbicidal effects.
Structure-activity relationships on the selective herbicidal activity between rice plant and barnyard grass by the N-phenyl substituents in 2-(4-(6-chloro-2-benzoxazolyloxy)-phenoxy)-N-phenyl propionamide derivatives
Sung, Nack-Do ; Lee, Sang-Ho ; Chang, Hae-Sung ; Kim, Dae-Whang ; Kim, Jin-Suk ;
The Korean Journal of Pesticide Science, volume 3, issue 3, 1999, Pages 11~19
A some of synthesized 2-(4-(6-chloro-2-benzoxazolyloxy)phenoxy)-N-phenyl propionamide derivativesa substrates were found to selectivity significantly with both rice plant (Oryza sativa L.) and barnyard grass (Echinochloa crus-galli) for those her- bicidal activities with post emergence in up land. The selectivity of substrates against rice plant better than that of Fenoxaprop-ethyl. The structure activity relationship (SAR) n the selectivity of N-phenyl substituents were analyzed by the Free-Wilson and Hansch method. The SAR approach against barnyard grass is shown that the optimal (
) hydrophobicity and electron donating effects (
) so that the herbicidal activity against rice plant can be decreased. The significance of these results on the selectivity between barnyard grass and rice plant is discussed. And it is assumed that the 2-ethoxy-3-methoxy-4-dimethylamino group substituent (
=6.60, 1g/ha) is selected as the most highest herbicidal activity against barngard grass in green house.
Degradation of herbicide paraquat by Fenton reagent and UV light irradiation
Kim, Byung-Ha ; Ahn, Mi-Youn ; Kim, Jang-Eok ;
The Korean Journal of Pesticide Science, volume 3, issue 3, 1999, Pages 20~26
This study was to investigate the potential degradation of a herbicide paraquat by Fenton reagents(ferric ion and hydrogen peroxide) under UV light irradiation(365 nm) in an aqueous solution. When
mg/L of paraquat was reacted with either ferric ion or hydrogen peroxide in the dark or under UV light, no degradation was occurred. However, the simultaneous application of both ferric ion(0.8 mM) and hydrogen peroxide(0.140 M) in paraquat solution(500 mg/L) caused dramatic degradation of paraquat both in the dark (approximately 78%) and under UV light(approximately 90%). The reaction approached an equilibrium state in 10 hours. In the dark, when
mM ferric ion was added,
mg/L was degraded, regardless of hydrogen peroxide concentrations(
M), while under UV light, 95% of 10 and 100 mg/L paraquat was degraded regardless of ferric ion and hydrogen peroxide concentrations. At paraquat concentration of 200 and 500 mg/L, paraquat degradation increased with increasing ferric ion concentrations as in the dark. However the increase in hydrogen peroxide concentration did not affect the extent of paraquat degradation. The initial reaction rate constants(k) for paraquat degradation ranged from 0.0004 to 0.0314, and 0.0023 to 0.0367 in the dark and under UV light, respectively. The initial reaction rate constant increased in proportion to the increase in ferric ion concentration in both conditions. The half-lives of paraquat degradation(t1/2) were 20 - 1,980 and 19 - 303 minutes in the dark and under UV light, respectively. This study indicates that Fenton reagents under UV light irradiation are more potent than in the dark in terms of herbicide paraquat degradation in an aqueous solution.
Effect of Insecticide Carbofuran and Phenobarbital Sodium and 3-Methylcholanthrene on Activity of Enzyme in Rat
Rim, Yo-Sup ; Han, Seong-Soo ;
The Korean Journal of Pesticide Science, volume 3, issue 3, 1999, Pages 27~36
Effect of insecticide carbofuran and phenobarbital sodium(PB) or 3-methylcholanthrene(3-MC), they were orally administered by the chemicals, alone or in combination, on activities of several enzymes in rats were investigated. In in vivo test for the effect of this chemicals on activity of enzyme in rat, activities of acetylcholinesterase(AChE) and butyrylcholinesterase(BuCheE) were inhibited by
for 48 hrs after the oral administration of carbofuran alone of 3.8mg/kg, whereas those were lowered at the beginning, but recovered to the control level after 24 hrs, in case of the mixed administration of carbofuran+PB or carbofuran+3-MC. The activity of glutathione S-transferase(GST) was inhibited by more than 15 to 35% for an early period of 0.5 to 6 hrs, in the case of the administration of carbofuran alone, whereas that was slightly inhibited at the beginning, recovered almost to the control level after 3 hrs, and raised by mere than 20% above the control after 6 hrs, in case of the mixed administration of carbofuran+PB or carbofuran+3-MC. When carbofuran was administered alorig with PB or 3-MC, the activities of UDP-glucuronosyltransferase(UDPGT) and cytochrome P-450 were more than 2.6 to 2.8 times higher than that in the case of the administration of carbofuran alone for 6 hrs. These results suggest that a simultaneous application of carbofuran and PB or 3-MC is critical for the enhancentment of activity of GST, UDPGT and cytochrome P450 and the protection of rat from carbofuran toxicity.
Antifungal activities of sulphamide and dicarboximide fungicides against Botrytis cinerea in several in vitro bioassays
Choi, Gyung-Ja ; Kim, Heung-Tae ; Kim, Jin-Cheol ; Cho, Kwang-Yun ;
The Korean Journal of Pesticide Science, volume 3, issue 3, 1999, Pages 37~44
Two sulphamide (dichlofluanid and tolylfluanid) and three dicarboximide fungicides (iprodione, vinclozolin, procymidone) were used to investigate the correlation between in vitro antifungal activities and in vivo disease controlling activities against Botrytis cinerea, a causal agent of tomato gray mold and to develop efficient in vitro assays. They controlled effectively the development of tomato gray mold disease in vivo and their controlling activities were similar one another. However, several in vitro assays revealed that their in vitro antifungal activities were quite different between sulphamide and dicarboximide fungicides; the formers showed stronger inhibition activities for spore germination than the latters, whereas the formers inhibited mycelial growth less severely than the latters. The results indicate that the fungicides having different modes of action can show different in vitro antifungal activities according to in vitro assays, even if they have similar in vivo disease controlling activities. On the other hand, two rapid and efficient in vitro assays named Microtiter plate methods I (MPM I) and II (MPM II) were developed for the evaluation of fungicides for inhibitory activities against spore germination and mycelial growth of B. cinerea, respectively. The antifungal activities of five fungicides of two chemical groups in MPM I and II were correlated with the inhibitory activities against spore germination and mycelial growth using solid media, respectively.
Response of Red Sorrel (Rumex acetosella L.) to Several Soil- and Foliar-Applied Herbicides
Kim, Song-Mun ; Kim, Yong-Ho ; Hwang, Ki-Hwan ; Ahn, Mun-Sub ; Hur, Jang-Hyun ; Han, Dae-Sung ;
The Korean Journal of Pesticide Science, volume 3, issue 3, 1999, Pages 45~53
Red sorrel (Rumex acetosella L.) is a troublesome perennial weed in the alpine grasslands of Kangwon Province of Korea. A number of soil- and foliar-applied herbicides were evaluated for their efficacy of red sorrel control. In greenhouse experiments, no soil-applied herbicides, such as pendimethalin, simazine, alachlor, metolachlor, ethalfluralin controlled red sorrel, however, foliar-applied herbicides, such as glufosinate, paraquat, glyphosate, glyphosate + 2,4-D, dicamba, mecoprop, 2,4-D, bentazone controlled more than 60% of red sorrel 2 weeks after treatments. When dicamba and 2,4-D were applied to red sorrel in different growth stages, the auxin-type of herbicides cold control red sorrel regardless of growth stage. This result implies that the auxin-type herbicides can be applied between early May (early growth stage) and mid lune (before fruit maturation) at Kangwon alpine grasslands. In a field experiment, glufosinate at 1.0 kg a.i,
, glyphosate at 3.28 kg a.i.
, dicamba at 0.96 kg a.i.
, and mecoprop at 150 kg a.i.
controlled more than 80% of red sorrel 4 weeks for treatment, suggesting such herbicides could be applied for red sorrel control at Kangwon alpine grasslands.
Weed control and herbicide use by corn growers at Kangwon-do, Korea
Kim, Song-Mun ; Lee, Ahn-Su ; Kim, Yong-Ho ; Cho, Jun-Mo ; Hur, Jang-Hyun ; Han, Dae-Sung ;
The Korean Journal of Pesticide Science, volume 3, issue 3, 1999, Pages 54~59
The objective was to know if corn growers at Hongchcel County, Kangwon-do, where corn is the major agricultural product, control weeds effectively and use herbicides properly to control weeds. Sixty-eight corn growers at Hongchon were participated in this survey. Corn growers have noxious weeds, such as hairy carbgrass, common purslane, lambsquarters, Asiatic dayflower, mugwort and barnyard grass in their corn fields. Forty-four percents of the answered corn growers control weeds by hand weeding, and the others by a combination of physical and chemical methods. Corn growers have a preference of paraquat and alachlor for a pre-emergence treatment (94% of the answered) and of paraquat, glufosinate, glyphosate and fluazifop-P-butyl for a post-emergence treatment (87% of the answered). Corn growers did not select and use herbicides in a proper manner. fifty-four percent of the answered corn fevers selected herbicides by their own experience and 18 percent by neighbors recommendation. Herbicides were not selected and used in a proper manner by corn growers: 54 percent of the answered selected herbicides by the experience of growers and 18 percent by the recommendation of neighbors. In addition, a half of the answered applied over two-fold higher amounts of herbicides than the recommended rate. With these improper- selection and use of herbicides, 37 percent of the answered have experienced the crop damage and 42 percent the herbicide poisoning. We conclude that the development of the educational program for the proper selection and use of herbicides is needed for corn growers in Kangwon-do.
Insecticidal effect of imidacloprid to sucking, chewing insect pests, and predacious spiders
Choi, Byung-Ryul ; Lee, Si-Woo ; Song, Yoo-Han ; Yoo, Jai-Ki ;
The Korean Journal of Pesticide Science, volume 3, issue 3, 1999, Pages 60~67
Insecticidal activities of imidacloprid to sucking type insect pests, brown planthopper (BPH, Nilaparvata lugens) and peen peach aphid (GPA Myzus persicae), to chewing type insect pests, tobacco cut worm (TCW; Spodoptera litura) and beet armyworm (BAW, Spodoptera exigua) and to spiders, Pirata subpiraticus, Pachygnata clercki and Ummeliata insecticeps, as natural enemies were investigated by several bioassay methods.
of the chemical by topical treatment to BPH was 0.015
(48 hrs), while
by leaf dipping and root zone treatment were 18.1 and 21.5 ppm, respectively. There was no difference in insecticidal activities between leaf dipping and root zone treatment. Imidacloprid also showed ovicidal effect of root zone treatment and its
(48 hrs after treatment) of imidacloprid to GPA was
in case of topical application and
by leaf dipping and root zone treatment were 1.9 ppm and 13.7 ppm respectively. Leaf dipping was more effective than root zone treatment in GPA At topical application
(48 hrs after treatment) of imidacloprid to chewing type insect pests, TCW and BAW, were greater than 1,492 and
by leaf dipping method were 4,803 and Heater than 5,000ppm respectively. This means that imidacloprid has much less effect on chewing type insect pests, TCW and BAW.
(48 hrs after treatment) of imidacloprid to wandering spiders, Pirata subpiraticus, Pachygnata clercki at topical application were greater dan
and greater than
respectively and that to webbing spider, Ummeliata insecticeps, was 357
. Imidacloprid showed very low toxicity to the spiders and its selective toxicity ratios between spiders and BPH were greater than 19,600, greater than 19,800 and 23,800, respectively.
Synthesis and Herbicidal Activity of New Hexahydrobenzisoxazole Derivatives
Kim, Hyoung-Rae ; Park, Hyun-Ju ; Kim, Hyung-Ki ; Song, Jong-Hwan ; Jeon, Dong-Ju ; Kim, Kyung-Mahn ; Kim, Tae-Joon ; Ryu, Eung-K. ;
The Korean Journal of Pesticide Science, volume 3, issue 3, 1999, Pages 68~70
Hexahydro-1,2-bertzisoxazol-4-ols prepared from the diastereoselective reductions of 3-aryl-3a,4,5,6,7,7a-hexahydro-1,2-benzisoxazol-4-ones were reacted with benzyl chloride in the presence of sodium hydride to give new 4-benzyloxy-3a,4,5,6,7,7a-hexahydro-1,2-benzisoxazoles, which showed good herbicidal activity together with excellent selectivity on rice under submerged paddy conditions.