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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Korean Journal of Weed Science
Journal Basic Information
Journal DOI :
The Korean Society of Weed Science
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Volume & Issues
Volume 28, Issue 4 - Dec 2008
Volume 28, Issue 3 - Sep 2008
Volume 28, Issue 2 - Jun 2008
Volume 28, Issue 1 - Mar 2008
Selecting the target year
Characteristics of Quinclorac and Its Affect to Crops
Lee, In-Yong ; Park , Jae-Eup ; Ryu, Gab-Hee ;
Korean Journal of Weed Science, volume 28, issue 2, 2008, Pages 83~100
Quinclorac (3, 7-dichloro-8-quinoline carboxylic acid) was very effective in controling barnyardgrass in rice paddy field and was registered in 1986 in Korea. Quinclorac was absorbed through foliage and roots of plants, and its herbicidal effect was similar to auxin-type herbicides in susceptible broadleaf plants, but inhibited cell wall biosynthesis in susceptible grasses. To control annual and perennial weeds including barnyardgrass in rice paddy fields, quinclorac was developed in mixtures with benatzone, bensufuron-methyl, or pyrazosulfuron-ethyl. However, the herbicide including quinclorac as an active ingredient caused severe phytotoxicity to succeeding crops such as red pepper, egg plant, tomato, and potato. These crops showed a high suceptibility to even at residue of 0.015 to 0.158 ppm in paddy soil. In addition, quinclorac contaminated ground water by leaching easily. To decrease its phytotoxicity to succeeding crops, reduction of the application rate or incorporation of active carbon more than 5 M/T ha-1 into paddy soil were tried but have not provided a real solution to phytotoxicity to the succeeding crops due to its soil residue. Therefore, the herbicides including quinclorac were banned on February 17 1995 in Korea.
Interpretation of Glufosinate Reactive Mechanism and Proteome Variation in Rice (Oryza sativa)
Lee, Young-Woo ; Shim, Yi-Sung ; Kim, Yong-Hyun ; Kim, Sung-Min ;
Korean Journal of Weed Science, volume 28, issue 2, 2008, Pages 101~110
Proteomics analyzing the overall proteins by separation and identification techniques was introduced to clarify the inhibitive processes of glufosinate and to determine its mode of action. Rice (Oryza sativa L. cv. Ilpumbyeo) seedlings grown until the 4th-leaf stages in a growth chamber were utilized as test plants. The seedlings were given foliar treatment with glufosinate at the designated concentration following which changes in the physiological phenomenon and proteomes were investigated by the time-course. Inhibition of protein synthesis related to the photosynthesis and protective mechanisms were observed through the proteome analysis. The spot area of both large and small subunit of Rubisco catalyzing the CO2 introduction in the dark reaction of photosynthesis decreased in 4hrs after glufosinate treatment, especially at higher concentration. Furthermore, this trend became clearer with increasing time after glufosinate treatment. However, the enzymes scavenging the reactive oxygen produced under the oxidative stresses, ascorbate peroxidase and dehydroascorbate reductase, increased in 4 hrs after glufosinate treatment whereas the catalase decreased in 72 hrs after treatment. These phenomena became clearer after 72 hrs and at the higher concentration of glufosinate. From the above results, it is suggested that the normal synthesis of amino acids and proteins such as the photosynthetic enzymes, including Rubisco, is inhibited by glufosinate, which in turn affects the increase in reactive oxygens, the induction of their scavenging enzymes such as ascorbate peroxidase, and the reduction of chlorophyll fluorescence and photosynthesis, resulting in the chlorosis of leaves and the subsequent death of seedlings.
Effects of Rye Sowing Dates on Weed Occurrence in Organic Soybean Field
Lee, Byung-Mo ; Jee, Hyeong-Jin ; Ryu , Kyoung-Yul ; Park , Jong-Ho ; Lee, Ji-Hyun ;
Korean Journal of Weed Science, volume 28, issue 2, 2008, Pages 111~116
This study was conducted to determine the effect of rye sowing date on weed suppression in the organic soybean field located at Ansung, Gyeonggi province. In 2006, rye was sown on March 20th, April 1st, April 20th, and May 10th. Among the these sowing dates, March 20th resulted in highest biomass of rye and weed control value as 99.3%. Weed occurrence was negatively correlated with grain yield of soybean. Consequently, the rye sowing date of March 20th provided highest soybean yield among the spring sowing dates. In 2007, effects of autumn sowing and spring sowing of rye on weed suppression and soybean yield were compared. The biomass of rye in autumn sowing was higher than spring sowing, however, weed suppression rate was not significantly different from each other. Considering negative correlation of weed occurrence and soybean yield, yield of autumn sowing plot was expected similar to or higher than spring sowing plot. However, severe drought stress of the year decreased the soybean yield of autumn sowing plot, possibly because of water competition between rye and soybean. Results indicated that early spring sowing of rye is practical to suppress weed in organic soybean field when sufficient biomass of rye is assured.
Change of Weed Species in Burcucumber (Sicyos angulatus L.) Community and Domestic Distribution Aspect
Moon, Byeong-Chul ; Oh, Se-Mun ; Lee, In-Yong ; Kim, Chang-Seok ; Cho, Jeong-Rae ; Kim, Seok-Cheol ;
Korean Journal of Weed Science, volume 28, issue 2, 2008, Pages 117~125
This experiment was conducted to elucidate an effect of dominance of burcucumber (Sicyos angulatus L.) in non-cultivated area on the change of weed flora and investigate its national distribution. In the region which burcucumber was dominant (RBD), the weed species showing dominance of over 10% in the survey of early June and late August was two species each. Whereas, weed species with dominance of over 10% in the region which burcucumber wasn't distributed (RBND) was one species in the survey of early June and wasn't found in that of late August. The total sum of weed species with dominance of over 5% showed higher tendency as 56.4% and 51% in the survey of early June and late August in RBD compared with 35.3% and 22.1% in RBND, respectively. The number of weed distributed in RBD was smaller as 34 and 33 species in the investigation of early June and late August compared with 51 and 56 species in RBND, respectively.Domestic distribution of burcucumber showed higher occurrence of 55.6% among total sites in Gyeonggi province and Gangwon province and the other provinces were investigated as the order of Gyeongsangbuk province, Jeollabuk province, and chungcheongbuk province. Fifty two percent among total sites which burcucumber occurred was distributed largely along riverside and the rest habitats showed occurrence rate of 17%, 13%, 9%, and 9% in small mountain, roadside, open area, and cultivated area, respectively.
Composition of Phenolic Compounds in Soybean Meal Extracts and their Allelopathic Effects on Paddy Weeds
Any, Xue-Hua ; Lee, Sang-Bok ; Im, Il-Bin ; Kim , Sun ; Ahn , Seung-Hyen ; Kim, Jai-Duk ;
Korean Journal of Weed Science, volume 28, issue 2, 2008, Pages 126~131
In this research, the allelopathic effect of soybean meal on paddy weeds and composition of phenolic compounds of soybean meal were studied. When transplanted rice was treated with 2.00ton ha-1 soybean meal, the fresh weight was 53.2% higher than untreated control. To the plant number of Echinochloa crus-galli, Monochoria vaginalis, Cyperus difformis, Scirpus juncoides and Aneilema keisak inhibitory effects show the range like from 40.6 to 100%. However there were no inhibitory effects on sedges of Eleocharis kuroguwai, Scirpus planiculmis, Cyperus serotinus Rottb. When treated with 5% aqueous extract of soybean meal, inhibitory effects to the plant number of E. crus-galli and A. keisak were decreased to 31.1% and 46.4%, respectively of control. Inhibition effect of the extract of soybean meal was higher on the root growth than on the shoot growth of E. crus-galli, A. keisak and S.juncoide. Soybean meal contains some phenolic compounds, such as p-coumaric acid, benzoic acid, caffeic acid, ferulic acid, trans-cinnamic acid and so on.
Appearance Ecology and Propagation Character of Amaranthus spinosus at Pasture in Jeju area
Oh, Se-Mun ; Moon, Byeong-Chul ; Kim , Chang-Seock ; Lee, In-Yong ;
Korean Journal of Weed Science, volume 28, issue 2, 2008, Pages 132~138
The ecological characteristics on Amaranthus spinosus which belongs to alien plant and grows in the pasture were investigated. The seed germination rate A. spinosus at 30-35 was high from 87-89% to 93-95% at 5 and 15 days after treatment, respectively. While it below 29 was very low rate below 3%. In nature, A. spinosus occurred from mid-May to July, and it has a tendency of rapid growth. The growth of A. spinosus at 30/25 (day/night) was increased, while it at 20/15 (day/night) was decreased. The number of leaves of A. spinosus at 45 days after sowing under 30/25 (day/night) were investigated, but the low number of leaves was observed at 20/15 (day/night). The cutting plants of A. spinosus was completely regenerated. The A. spinosus occurred mainly in pasture of western Jeju, and pastures of Sung-isidol, Keum-ak and Fa-il was seriously damaged.
Effect of Weeding and Growth Characteristics by Mulched Plant as Chinese Milk-vetch and Hairy-vetch and Seeding Density of Soybean at Soybean Cultivation in Paddy Field
Kim, Sun ; Im, Il-Bin ; Kang, Jong-Gook ; Lee , Sang-Bok ; An, Xue-Hua ;
Korean Journal of Weed Science, volume 28, issue 2, 2008, Pages 139~145
This experiment was conducted to establish weed management system by covering soil as use of mulch plants such as chinese milk-vetch (Astragalus sinicus L.,) and hairy-vetch (vicia villosa) at soybean cultivation in paddy field. The weed was reduced greatly according to cultivation of cover crop. To coat entire soil surface, hairy-vetch needs 120 plants per m2 and chinese milk-vetch needs 260 plants per m2, respectively. In spring season, weeds were occurred only 3 species in hairy-vetch plantation, but 13 species occurred in field without mulch plant. In summer season, Weeds were happened as 8 species and 18 species, respectively. Mulch plant cultivation was inhibited weed occurrence than cultivation without mulch plant in two seasons. Also, soybean seeding density affected in weed occurrence. Amount of weed occurrence was less in the planting density of 30cm 10cm than traditional practice of 60cm 10cm in planting. Nitrogen content in soil was increased as growing season in green manure plants and especially also more increased hairy-vetch than Chinese milk-vetch, and the yield of soybean was increased.
Biological Weed Control of Rumex obtusifolius by Releasing Control Agents, Gastrophysa atrocyanea and Ostrinia palustralis memnialis in Pasture
Park, Jae-Eup ; Park, Jin-Young ; Lee , In-Yong ; Kwon, Oh-Seok ;
Korean Journal of Weed Science, volume 28, issue 2, 2008, Pages 146~151
In order for the effective biological control of Rumex obtusifolius on pasture, the potential insect agents have been selected. Gastrophysa atrocyanea and Ostrinia palustralis memnialis were released in pasture of the Hanwoo improvement center, seosan city in Chungnam province. Weeding efficacy and the spatial distribution after releasing insects were investigated. Life cycle of insects in the pasture was continues above 30 days than pattern of plains. Gastrophysa atrocyanea memnialis released rapidly spread and suitably distributed in pasture. Weeding efficacy showed that the finall fresh weight and formation of flower stalk of Rumex obtusifolius were suppressed 80% and also highly inhibited seed production.When released Ostrinia palustralis memnialis of larvae stage, the stem and root of Rumex obtusifolius were damaged and greater died 98% at 30 days after release.The results of field experiments, Rumex obtusifoliu in pasture could be controlled by selected two species insect.
Herbicidal Activity of Essential Oil from Glechoma hederacea
Kim, Songmun ; Kim, Hee-Yeon ; Hwang , Ki-Hwan ; Chun, Ik-Jo ;
Korean Journal of Weed Science, volume 28, issue 2, 2008, Pages 152~160
Essential oil was extracted from a Korean native plant Glechoma hederacea by steam distillation method and herbicidal activity of the essential oil was determined. Yields of the oil was 0.10%, 0.13% and 0.18%, respectively, on June, August and October of 2005. In the oil obtained on October 2005, more than sixty chemicals were found：28 hydrocarbons (52.4%), 21 alcohols (22.2%), 4 ketones (2.9%), 3 ethers (7.9%), 3 oxides (15.5%), 1 ester (0.8%). Major constituents of the essential oil were 1,8-cineole (28.9 g g-1), -terpinene (22.6 g g-1), cymene (18.5 g g-1), curzerene (12.0 g g-1) and cyclopentanol (11.1 g g-1). In greenhouse experiments, applications of essential oil (10% emulsifiable concentrate) at more than 20 kg ai ha-1 provided high herbicidal activity against Echinochloa crus-galli, Digitaria sanguinalis, Setaris glauca, Quamoclit pennata, Aubtilon avicenna, Aeschynomene indica and Xanthium strumarium：6 out of 10 (0, no control; 10, total control) as visual rates. However, applications of essential oil (10% granule) at more than 80 kg ai ha-1 did not provide herbicidal activity. Our results suggest that emulsifiable-concentrate- formulated essential oil from Glechoma hederacea had potent herbicidal activity and could be used as a weed control agent in environment-friendly agriculture.
Physiological and Biochemical Changes of Rapeseed (Brassica napus L.) Seedlings by Herbicidal Natural Compound Methyl-p-hydroxybenzoate from Epimedium koreanum Nakai
Lim, Sang-Hyun ; Kim , Hee-Yeon ; Kim, Songmun ;
Korean Journal of Weed Science, volume 28, issue 2, 2008, Pages 161~170
Methyl-p-hydroxybenzoate was isolated from Epimedium koreanum and showed high herbicidal activity. Application of methyl-p-hydroxybenzoate (100 g g-1) to rapeseed (Brassica napus) seedlings reduced chlorophyll content and carotenoid content by 83% and 40%, respectively. In addition, application of methyl-p-hydroxybenzoate reduced photosynthesis rate, respiration rate and sugar content. The glucose, fructose and sucrose contents in methyl-p-hydroxybenzoate-treated seedlings were 2,952, 3,130, 1,410 g g-1, while those in untreated seedlings were 1,826, 2,582, 957 g g-1, respectively. In treated seedlings, contents of amino acids and soluble proteins were 63% and 97%, respectively, higher than those in untreated seedlings. Leaf discs from the treated seedlings released 23% more electrolytes compared to those from untreated seedlings two hours after treatment. The ultrastructures of cell membranes in cortex tissues of methyl-p-hydroxybenzoate-treated seedlings were disrupted. Such structural damage in cell membranes could directly be related to the increase in electrolyte leakage.