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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Weed & Turfgrass Science
Journal Basic Information
Journal DOI :
The Korean Society of Weed Science
Editor in Chief :
Volume & Issues
Volume 4, Issue 4 - Dec 2015
Volume 4, Issue 3 - Sep 2015
Volume 4, Issue 2 - Jun 2015
Volume 4, Issue 1 - Mar 2015
Selecting the target year
Dominance and Distribution of Weed Occurrence on Onion, Garlic, Potato, and Barley Fields of Gyeongbuk Province
Kim, Sang-Kuk ; Shin, Jong-Hee ; Park, Sang-Gu ; Kim, Se-Jong ;
Weed & Turfgrass Science, volume 4, issue 2, 2015, Pages 77~84
DOI : 10.5660/WTS.2015.4.2.77
We surveyed the distribution pattern of weeds in onion, garlic, potato, and barley fields including 304 sites of Gyeongsangbuk-do. The weeds were summarized as 30 family and 125 species in onion crop field, 29 family and 101 species in garlic field, 30 family 88 species in potato field, finally 27 family and 108 species. Compositae was dominant family (26.4%, 33 species), followed by Polygonaceae (8.8%, 11 species), Cruciferae (8.8%, 11 species) in onion field. Compositae was also dominant family (24.8%, 25 species) in garlic field, it was 22.7% (20 species) in potato field, and it was also 24.1% (26 species) in barley field, respectively. Among these winter crops, major five families were occupied 61.1, 58.4, 58.0 and 57.5% in turn at barley, onion, potato and garlic fields. The PCA-covariance plot analysis for investigation of occurrence pattern of weeds by four winter crop fields revealed that the occurrence pattern of weed species in barley field was distinguished by Alopecurus aequalis var. amurensis, Stellaria alsine var. undulate and Stellaria aquatica.
The Weed Flora of Korean Mulberry Fields
Lee, In-Yong ; Kim, Chang-Seok ; Lee, Jeongran ; Song, Hee-Kun ; Seo, Hyun-A ; Choi, Kyung-Mi ; Ji, Sang-Deok ;
Weed & Turfgrass Science, volume 4, issue 2, 2015, Pages 85~94
DOI : 10.5660/WTS.2015.4.2.85
The weed flora in the mulberry fields were investigated in Suwon, Jeonju, and Buan in May, July, and September of 2014. The objectives of this study were to use the survey data for establishing weed control methods and to bring awareness of possible problematic weeds in the Korean mulberry fields. The survey was conducted in 53 regions, covering approximately
. Altogether 153 weed species of 37 families were identified, of which 68 were annual, 39 species were biennial and 46 were perennial. The dominance was the highest with Digitaria ciliaris followed by Erigeron annuus, Chenopodium album, Echinochloa crus-galli var.crus-galli, Acalypha australis, Commelina communis etc. Exotic weeds presented 44 species with 28.8% of a total presence, of which Erigeron annuus was the highest, followed by Chenopodium album, Phytolacca americana, Conyza canadensis, Oxalis corymbosa etc. Especially, we should aware Senecio vulgaris, not controlled with glufosinate ammonium SL in the Korean mulberry fields because it was known as atrazine resistance in US, Canada, Germany etc. In the PCA plot, weeds presented in the mulberry fields were divided into two groups, Eclipta prostrata community and Stellaria aquatic community and weed flora of Suwon and Buan were different due to those only presented in Suwon.
Dominance and Distribution of Weed Occurrence on Hot Pepper, Soybean, Maize, and Chinese Cabbage Fields of Gyeongbuk Province
Kim, Sang Kuk ; Kim, Hak Yoon ;
Weed & Turfgrass Science, volume 4, issue 2, 2015, Pages 95~103
DOI : 10.5660/WTS.2015.4.2.95
In this study, we surveyed the distribution pattern and dominance of weeds occurred in four summer crop fields, hot pepper, soybean, maize, and Chinese cabbage in Gyeongbuk province. The weeds were summarized as 32 family and 132 species in hot pepper field, 31 family and 116 species in soybean field, 37 family 134 species in maize field, finally 35 family and 170 species in Chinese cabbage field. Among these weeds occurred in the four summer crop fields, the compositae was commonly dominant family, it occupied 17.4% in hot pepper field, 18.1% in soybean field, 11.9% in maize field, and 16.5% in Chinese cabbage field. The major five families including compositatae, graminae, polygonaceae, convolvulaceae and cruciferae were occupied 43.2% in hot pepper field, 47.4% in soybean field, 42.5% in maize field, and 43.5% in Chinese cabbage field, respectively. Furthermore, the most dominant weed in the hot pepper, soybean, maize, and Chinese cabbage fields was Portulaca oleracea, Digitaria ciliaris, and Rorippa palustris, respectively. This information could be useful for estimation of future weed occurrence, weed population dynamics and establishment of weed control methods in food crop fields of Gyeongbuk province.
Weed Control Efficacy and Production of Fruit according to Several Weed Control Methods in an Apple Orchard
jang, Il ; Kang, Ji Eun ; Kim, Hyang Mi ; Park, Yong Seog ; Lee, Jeong Deug ; Suh, Sang Jae ;
Weed & Turfgrass Science, volume 4, issue 2, 2015, Pages 104~110
DOI : 10.5660/WTS.2015.4.2.104
This study was conducted for 3 years in an apple orchard to investigate the efficacy of the glufosinate-ammonium (GFA) SL for weed control in comparison to non-woven fabric mulch, sod culture and machinery cutting treatments. Glufosinate-ammonium SL 18% was applied with 2 to 3 times, and the extents of injury caused by the different weed control methods were also investigated during the 3 years. The highest level of weed control was obtained by glufosinate-ammonium 3 times spray (98.7%), followed by machinery cutting (95.1%), glufosinate-ammonium 2 times spray (81.5%) and natural sod culture (5.8%). Amounts of fruit production in three times application of glufosinate-ammonium 540 g a.i.
, twice application of GFA, machinery cutting, non-woven fabric processing, sod culture and untreated control were 27.2, 26.2, 25.3, 24.1, 20.4 and 13.3 kg, respectively. There was no toxicity symptom of glufosinate-ammonium on the whole tree such as fruit, bud, trunk, branch and flower during the 3 years.
Moisture Sorption Isotherms of Four Echinochloa Species Seeds
Lee, Yong Ho ; Byun, Ji Young ; Na, Chae Sun ; Kim, Tae Wan ; Kim, Jeong-Gyu ; Hong, Sun Hee ;
Weed & Turfgrass Science, volume 4, issue 2, 2015, Pages 111~117
DOI : 10.5660/WTS.2015.4.2.111
The equilibrium moisture contents (EMC) in seeds of four Echinochloa (E. crus-galli var. crus-galli, E. crus-galli var, echinata, E. crus-galli var. praticola, E. esculenta) were measured at
with equilibration over a series of lithium chloride solutions with relative humidities ranging from 0.11 to 0.8 to determine sorption isotherms and safe storage relative humidity. Standard seed sorption isotherm models i.e. modified Henderson, modified Chung-Pfost, modified Halsey, modified Oswin and Guggenheim-Anderson-deBoer (GAB) equations were adopted to evaluate the goodness of fit to sorption isotherms. This study indicated that EMC of seeds was significantly different in four Echinochloa species at various relative humidity. The modified Oswin equations for E. crus-galli var. crou-galli, E. crus-galli var, echinata, E. esculenta and GAB equation for E. crus-galli var. praticola were adequate models for the EMC data. Seeds of four Echinochloa species have monolayer moisture contents when stored at RH < 0.1. These results show that seed moisture isotherm model should be selected according to genetic variation.
Establishing Effective Screening Methodology for Novel Herbicide Substances from Metagenome
Lee, Boyoung ; Choi, Ji Eun ; Kim, Young Sook ; Song, Jae Kwang ; Ko, Young Kwan ; Choi, Jung Sup ;
Weed & Turfgrass Science, volume 4, issue 2, 2015, Pages 118~123
DOI : 10.5660/WTS.2015.4.2.118
Metagenomics is a powerful tool to isolate novel biocatalyst and biomolecules directly from the environmental DNA libraries. Since the metagenomics approach bypasses cultivation of microorganisms, un-cultured microorganisms that are majority of exists can be the richest reservoir for natural products discovery. To discover novel herbicidal substances from soil metagenome, we established three easy, simple and effective high throughput screening methods such as cucumber cotyledon leaf disc assay, microalgae assay and seed germination assay. Employing the methods, we isolated two active single clones (9-G1 and 9-G12) expressing herbicidal activity which whitened leaf discs, inhibited growth of microalgae and inhibited root growth of germinated Arabidopsis seeds. Spraying butanol fraction of the isolated active clones' culture broth led to growth retardation or desiccation of Digitalia sanguinalis (L) Scop. in vivo. These results represent that the screening methods established in this study are useful to screen herbicidal substances from metagenome libraries. Further identifying molecular structure of the herbicidal active substances and analyzing gene clusters encoding synthesis systems for the active substances are in progress.
Soil Microbial Community Analysis in Large Patch (Rhizoctonia solani AG2-2 IV)
Lee, Jung Han ; Min, Gyu Young ; Shim, Gyu Yul ; Jeon, Chang Wook ; Choi, Su min ; Han, Jeong Ji ; Kwak, Youn-Sig ;
Weed & Turfgrass Science, volume 4, issue 2, 2015, Pages 124~128
DOI : 10.5660/WTS.2015.4.2.124
Large patch, caused by Rhizoctonia solani AG2-2 IV, is a soil-born disease that is the most important of warm season turfgrass such as zoysia and Bermuda grass. This study was conducted to analysis of the soil microbial community structure on large patch. Center of the large patch (CLC), edge (CLE) and healthy (CLH) part of microbial communities were examined using metagenomics in Phylum level. Distribution trends of the rhizosphere microorganisms were similar to the order Proteobacteria, Acidobacteria, Chloroflexi, Firmicutes, Planctomycetes, Gemmatimonadetes, Nitrospira, Cyanobactria and Verrucomicrobia in soil collections. Contrastively Actinobacteria was more 56% abundant in healthy part soil (16%) than in the center (9.28%) or edge (10.84%) parts. Taxonomic distributions were compared among the CLC, CLE and CLH, total 6,948 OTUs were detected in the CLC, 6,505 OTUs for the CLE and 5,537 OTUs were detected in the CLE. Distributions of Actinobacteria OTUs were appeared 615 OTUs in the CLC, 709 OTUs in the CLE and 891 OTUs in the CLH. Among Actinobacteria, 382 OTUs were overlapped in the all soils. Not matched OTUs of CLH (286 OTUs) was detected 23 times higher than CLC (91 OTUs) and CLE (126 OTUs).
Insecticidal Activity of Essential Oils against Whitegrub
Lee, Dong Gon ; Jung, Young Hak ; Choi, Dae Hong ; Choi, Sung Hwan ; Choo, Ho Yul ; Lee, Dong Woon ;
Weed & Turfgrass Science, volume 4, issue 2, 2015, Pages 129~134
DOI : 10.5660/WTS.2015.4.2.129
White grub damages various crops, trees and they can also be one of the most serious pests of turf grass in golf courses. This study was conducted to determine the biocontrol of white grubs with 18 different kinds (anise, camphor, castor, cinnamon, clove oil, citronella, fennel, geranium, lavender, lemongrass, linseed, neem, peppermint, pine, rosemary, tea-tree, thyme, and turpentine) of plant essential oils in laboratory, green house and field. Anise oil (88.9%), linseed oil (100%), and tea-tree oil (88.9%) were highly effective among tested essential oils against 3rd instar of Bifurcanmala aulax in cap vial experiment. However, anise and linseed oils showed low mortality against
instar of Popillia japonica in pot greenhouse experiment. Efficacy of anise, linseed oil, and tea-tree was also different depending on target white grub in field trials. Correlated mortality showed 32.6% only in tea-tree oil treatment against pupae of Adoretus tenuimaculatus however, correlated mortality of anise, linseed and tea-tree oil were 54.8, 51.6 and 56.5% respectively against
instar of Exomala orientalis in the field trial in Adelscott Country Club in Hapcheon, Gyeongnam province.
Genetic Relationships among Typhula ishikariensis Varieties from Wisconsin
Chang, Seog-Won ;
Weed & Turfgrass Science, volume 4, issue 2, 2015, Pages 135~143
DOI : 10.5660/WTS.2015.4.2.135
Typhula ishikariensis Imai is a causal agent of Typhula snow mold, one of the most important turfgrass diseases in northern regions of the United States. Within Wisconsin isolates, there are three district groups clustered with known isolates of T. ishikariensis var. ishikariensis, var. canadensis and var. idahoensis as identified by RAPD markers. To further investigate the genetic relationship among these groups (varieties), monokaryon-monokaryon and dikaryon-monokaryon mating experiments were conducted. Mating types from var. ishikariensis, var. canadensis and var. idahoensis isolates were paired in all possible combinations. Pairings between var. canadensis and var. idahoensis were highly compatible, while no compatibility was detected between var. ishikariensis and either var. canadensis or var. idahoensis. These results indicate that var. ishikariensis is genetically separated from var. canadensis and var. idahoensis, whereas var. canadensis and var. idahoensis appeared to be genetically related to each other as a taxonomic unit. In the genetic relationship with the known biological species, var. ishikariensis and var. canadensis were genetically related to biological species I and II, respectively. However, var. idahoensis was not compatible with any of the biological species, suggesting that the pathogen may be in the process of biological speciation from var. canadensis.
Effect of Water Soluble Silicate on Zoysiagrass Growth
Han, Jeong-Ji ; Lee, Kwang-Soo ; Park, Yong-Bae ; Choi, Su-Min ; Yang, Geun-Mo ; Bae, Eun-Ji ;
Weed & Turfgrass Science, volume 4, issue 2, 2015, Pages 144~150
DOI : 10.5660/WTS.2015.4.2.144
Silicate fertilizers known to be effective in improving the growth and density of zoysiagrass. Most silicate fertilizers being used in Korea are slag-originated silicate fertilizer, but some water soluble silicate fertilizers are commercially available recently. This study was conducted to know the effect of water soluble silicate fertilizer, on the growth of zoysiagrass and the change of soil chemical properties in Wagner pot and field experiment. Root length, fresh and dry weight of shoots and stolons, the number of shoots and stolons, total of stolons length and the
content of internal plant were significantly increased by the
content but chemical properties of the soil were not significantly changed by the
contents of 18 and
did not show significance difference, and therefore a reasonable application the content of
was thought to be
. Foliar spray of water soluble silicate fertilizer is believed to enhance the growth and density of zoysiagrass than soil application.