Go to the main menu
Skip to content
Go to bottom
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 3, Issue 4 - Dec 2014
Volume 3, Issue 3 - Sep 2014
Volume 3, Issue 2 - Jun 2014
Volume 3, Issue 1 - Mar 2014
Selecting the target year
Chemical and Physical Characteristics of Four Weed Seed Fibers (Hemistepta lyrata, Imperata cylindrica var. koenigii, Metaplexis japonica and Typha latifolia)
Yoon, A Ra ; Lee, Min Woo ; Kim, Seul Ki ; Kim, Jin-Seog ;
Weed & Turfgrass Science, volume 3, issue 4, 2014, Pages 253~261
DOI : 10.5660/WTS.2014.3.4.253
In this study, we investigated several chemical and physical characteristics of 4 weed seed fibers; Hemistepta lyrata (HEMLY), Imperata cylindrica var. koenigii (IMPCK), Metaplexis japonica (METJA) and Typha latifolia (TYPLA). In chemical composition, there were 74 (TYPLA)-88.5% (METJA) of holocellulose, 17 (IMPCK)-24% (METJA) of lignin, 0.22 (METJA)-4.2% (IMPCK) of ash, 2.2 (HEMLY)-7.8% (IMPCK) of hot water extractives and 0.4 (IMPCK)-6.3% (TYPLA) of solvent extractives. Alpha-cellulose proportion to holocellulose was similar among weed seed fibers as 45-48%. The crystallinity index (CI) of raw seed fibers was 53.2 (TYPLA)-65.9% (HEMLY). However, CI of the chemical treated fibers (EDA fibers) was a little increased and showed 61.1 (IMPCK)-71.8% (METJA). The maximum thermal decomposition temperature (MTDT) of the raw seed fibers were 312, 321.8, 331.5 and
in METJA, TYPLA, HEMLY and IMPCK, respectively. But the MTDT of the EDA fibers were 327, 327, 341.7 and
in HEMLY, TYPLA, METJA and IMPCK, respectively. Taken together, they showed a similar or better characteristics compared to the reported or commercial natural fiber resourses. Accordingly, they seem to be practically applicable as renewable resources for a new natural fibers.
Occurrence and Distribution of Weed Species on Upland Fields in Chungnam Province
Hwang, Ki Seon ; Eom, Min Yong ; Park, Su Hyuk ; Suh, Su Jeoung ; Lee, In Yong ; Park, Kee Woong ;
Weed & Turfgrass Science, volume 3, issue 4, 2014, Pages 262~268
DOI : 10.5660/WTS.2014.3.4.262
This study was conducted to provide basic information for weed control by surveying the occurrence of weed species. Surveys of weed species occurred in food crop (barley, maize, potato, soybean) fields were conducted in Chungnam province from April to September in 2014. Total 321 sites of food crop fields in 17 City / Gun in Chungnam province were investigated. From the result of this survey, 130 weed species in 36 families were identified and classified to 77 annuals, 27 biennials and 26 perennials. Based on the occurrence ratio, the most dominant weed species in Chungnam province food crop fields were Digitaria ciliaris (10.19%), followed by Conyza canadensis (7.82%), Portulaca oleracea (5.22%), Chenopodium album var. centrorubrum (5.21%), Capsella bursa-pastoris (3.47%) and Alopecurus aequalis (3.47%). Forty-four exotic weed species were identified. 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 Chungnam province.
Distribution Characteristics of Weeds and Vegetation Types in Dioscorea oppostifolia Thunb. Field
Kim, Duk-Hwan ; Park, Jae-Man ; Kang, Sang-Mo ; Lee, Seok-Min ; Lee, In-Yong ; Lee, In-Jung ;
Weed & Turfgrass Science, volume 3, issue 4, 2014, Pages 269~275
DOI : 10.5660/WTS.2014.3.4.269
A survey was conducted to identify the occurrence of problematic weed species on the Dioscorea oppostifolia fields in South Korea. Total 43 sites of the 8 different regions in S. Korea were investigated from May to October, 2014. In yam fields, the identified weeds were distributed in 11 families and 44 species. The exotic plants were identified as 3 families, 10 genera, 10 species. The vegetation of Dioscorea oppostifolia fields was classified into communities of 7 groups by methods of the Zurich-Montpellier school of phytosociology (Xanthium canadense Community, Bidens frondosa Community, Echinochloa oryzoides Community, Eclipta prostrata Community, Portulaca oleracea Community, Centipeda minima Community, Rorippa islandica Community). The weeds occurred in Dioscorea oppostifolia fields were divided into three groups in principal component plot analysis (PCA). Without weed control, yields loss in yam production was reached up to 82% as compared to weed controlled fields.
Distribution of Weeds on Upland Crop Field in Northern Gyeonggi-do
Oh, Young-Ju ; Lee, Wook-Jae ; Hong, Sun-Hee ; Lee, Yong-Ho ; Na, Chae-Sun ; Lee, In-Yong ; Kim, Chang-Seok ;
Weed & Turfgrass Science, volume 3, issue 4, 2014, Pages 276~283
DOI : 10.5660/WTS.2014.3.4.276
This study was conducted in order to investigate the distribution pattern of weeds on upland crop field in northern Gyeonggi-do. The weeds were summarized as 201 taxa including 42 families, 129 genera, 178 species, 1 subspecies, 21 varieties and 1 form. One hundred and thirty one species were classified to annual plants, accounting for 65.1% and 70 species were classified to perennials, accounting for the rest of 34.9%. Compositae was dominant family (21%), followed by Gramineae (12%), Polygonaceae (7%) and Brassicaceae (5%). Among the weeds appearing in the fields of northern Gyeonggi-do, the invasive weeds were classified to 62 species in18 families. The most dominant weed species in the fields were Portulaca oleracea, followed by Echinochloa crus-galli, Amaranthus lividus. Detrended correspondence analysis for investigation of occurrence pattern of weeds by crops revealed the occurrence pattern of weed species in adlay field were different from those in other crop fields. This information could be useful for establishment of weed control methods in northern Gyeonggi-do.
Distribution of Exotic Weeds on Upland Crop Field in Gyeonggi-do
Kim, Chang-Seok ; Lee, In-Yong ; Lee, Jeong-Ran ; Hong, Sun-Hee ; Oh, Young-Ju ;
Weed & Turfgrass Science, volume 3, issue 4, 2014, Pages 284~291
DOI : 10.5660/WTS.2014.3.4.284
We surveyed the distribution of exotic weeds in the 350 upland crop fields of Gyeonggi-do. The exotic weeds were summarized as 78 taxa including 19 families, 52 genera, 74 species and 4 varieties. Among the total exotic weeds, the summer annuals were 48.7%, the winter annuals 28.2%, and the perennials 23.1%. Compositae was dominant family (32%), followed by Gramineae (8%), Polygonaceae (8%) and Malvaceae (7%). Dominant exotic weeds in northern Gyeonggi-do were Amaranthus lividus, Ambrosia trifida, Chenopodium album, Bidens frondosa and Erigeron Canadensis, and in southern Gyeonggi-do were Chenopodium album, Erigeron Canadensis, Erigeron annuus, Taraxacum officinale and Galinsoga ciliate. The most dominant exotic weeds in the Gyeonggi-do were Chenopodium album, followed by Amaranthus blitum, Erigeron canadensis. Canonical correspondence analysis for investigation of correlation between exotic weeds occurred in northern and southern Gyeonggi-do showed that the exotic weeds in northern Gyeonggi-do were more diverse then in southern Gyeonggi-do. This information could be useful for establishment of exotic weed control methods in Gyeonggi-do.
Spreading and Distribution of Exotic Weed Ammannia coccinea in Korea
Hwang, Sunmin ; Kil, Jihyon ; Kim, Youngha ; Kim, Seungryul ;
Weed & Turfgrass Science, volume 3, issue 4, 2014, Pages 292~298
DOI : 10.5660/WTS.2014.3.4.292
Purple ammannia (Ammannia coccinea Rottb.) is an exotic weed originated from North America. It was known to be a noxious weed in a rice paddy field for the competition with rice. We investigated its distribution and habitat types in Korea to obtain basic data for the management plan of this species. Although purple ammannia is currently not a dominant species in natural habitats, its nationwide distribution was found in our study. We categorized the types of its habitats as margins of rice paddies, abandoned paddy fields, riverine wetlands and reservoirs. Particularly, purple ammannia plants were frequently located along banks of irrigation channels that ran through rice paddies and surrounding wetlands. Because they mainly occurred along the direction of water flow, we considered that the plants have spread along water courses. A total of 69 vascular plant taxa was identified at the habitats of purple ammannia. The largest group of life form among purple ammannia population was therophytes, which indicates that purple ammannia mostly grow in the disturbed habitats.
False Seedbed Weed Control under Different Preparation Date and Method in Organic Corn Field
Lee, Byung-Mo ; Jo, Jeong-Rae ; An, Nan-Hee ; Ok, Jung-Heun ; Kim, Seog-Cheol ;
Weed & Turfgrass Science, volume 3, issue 4, 2014, Pages 299~304
DOI : 10.5660/WTS.2014.3.4.299
Effects of false seedbed procedures in organic corn field were evaluated as affected by preparation date and method. False seedbed was prepared at May 7, 14, 21, 28 and June 5 with shallow tillage or flame weeding. Weed suppression rate of each treatment was evaluated 3 weeks after sowing. Optimal false seedbed preparation time was between end of May and early in June. Weed suppression rate of early false seedbed preparation was quiet low. Flaming weed treatment was better than shallow tillage. Weed suppression rate by the second treatment was increased approximately 30-60% compared to
treatment. Weed suppression rate at 3 weeks after sowing was 70-90% by the second false seedbed preparation. The results showed that the false seedbed technique between end of May and early in June preparation has some potential weed control to reduce weed population during crop growth. Therefore late planting time crop such as corn, sorghum and soybean would be possible to apply false seedbed for organic weed control.
Environmental Monitoring of Herbicide Tolerant Genetically Modified Zoysiagrass (Zoysia japonica) around Confined Field Trials
Lee, Bumkyu ; Park, Kee Woong ; Kim, Chang-Gi ; Kang, Hong-Gyu ; Sun, Hyeon-Jin ; Kwon, Yong-Ik ; Song, In-Ja ; Ryu, Tae-Hun ; Lee, Hyo-Yeon ;
Weed & Turfgrass Science, volume 3, issue 4, 2014, Pages 305~311
DOI : 10.5660/WTS.2014.3.4.305
The cultivation area and use of genetically modified (GM) crops have been increased continuously over the world. Seed distribution and transgenes to environmental ecosystem is one of the most important factors in risk assessment and risk management of GM crop. Safe management for the development and commercialization of GM crops is required according to The Act on Transboundary Movements of Living Modified Organisms,etc (LMO Act) in Korea. This study was conducted to setup the environmental monitoring system of GM zoysiagrass (event JG21 and JG21-MS). The monitoring was performed in 4 GMO confined fields, Sungwhan, Ochang, Jeju University and Jeju Namwon. In the result of monitoring, we could not found any gene flow and distribution of GM zoysiagrass in the 3 fields, but one spill of JG21 was found in the Namwon field in 2012. These results suggest that continuous monitoring is necessary to detect the occurrence of GM zoysiagrass for preventing genetic contamination in natural environment.
Fact-Finding Survey of Herbicide Use at Farmer's Level and Distribution of Herbicide Resistant Weeds in Paddy Field of Jeonbuk Province, Korea
Cho, Seung-Hyun ; Kwon, Seog-Ju ; Song, Young-Eun ; Lee, Deok-Ryeol ; Song, Young-Ju ; Kim, Chung-Kon ; Lee, In-Yong ;
Weed & Turfgrass Science, volume 3, issue 4, 2014, Pages 312~317
DOI : 10.5660/WTS.2014.3.4.312
This study was conducted to obtain basis information for effective weed control by the fact-finding survey of herbicides use at farmer's level and distribution of herbicide resistant weeds in paddy field of Jeonbuk province, Korea. The distributions of major paddy field weeds and frequently used herbicide according to the survey were as follows. The dominant weeds in rice paddy field were Echinochloa crus-galli, Eleocharis kuroguwai, Scirpus juncoides, Monochoria vaginalis, etc.. Preferred herbicides widely used by farmers were ranked in the following order, early and middle treatment (48.0%), treatment before transplanting (36.7%) and foliar treatment (15.3%). The occurrence of herbicide-resistant weeds according to collected paddy soils was as follows. The occurring area of herbicide-resistant weeds was 24,413 ha, approximately 18.4% of rice cultivation area. Herbicide-resistant weeds were occurred in four species. The order of occurrence were Scirpus juncoides (39.0%) > Monochoria vaginalis (27.8%) > Echinochloa crus-galli (16.6%) and Cyperus difformis (16.6%). This information could be useful for estimation of future herbicide-resistant weed and establishment of herbicide-resistant weed control methods in Jeonbuk province, Korea.
Weed Occurrences, Growth and Yield of Sorghum (Sorghum bicolor) by Hairy Vetch and Partial-Width Tillage
Hwang, Jae-Bok ; Jung, Ki-Youl ; Yun, Eul-Soo ; Choi, Young-Dae ; Hyun, Jong-Nae ; Yun, Jong-Tag ; Oh, In-Souk ; Lee, Byung-Mo ;
Weed & Turfgrass Science, volume 3, issue 4, 2014, Pages 318~322
DOI : 10.5660/WTS.2014.3.4.318
The effects of cover crops on weed suppression were evaluated in this study. Weed suppressing effects of hairy vetch cover crops were evaluated in summer grain fields. Cover crops were sown at the sowing rate of
on Oct. 2012 and Feb. 2013 without basal fertilization. Three weeks old sorghum seedlings were transplanted after minimum tillage on June 2013. Hairy vetch cover crop treatment significantly reduced weed biomass in the transplanted sorghum. By smothering, the cover crops reduced weed biomass to economic level in sorghum. Besides the weed suppression, hairy vetch cover crop resulted in green manure effect on crop growth. Hairy vetch treatment showed beneficial effects on sorghum growth. Reduction of weeds caused by use of strip-tillage machine and polyethylene film mulching was 71% and 88%, respectively. At harvest, yield of sorghum was greater in order of polyethylene film mulching > hairy vetch cover crop > control in transplanted fields.
Efficacy of Foliar Herbicide Treatment by Unmanned Helicopter under Water-Seeded Rice Cultivation
Seong, Deok-Gyeong ; Bea, Sung-Mun ; Kim, Young-Gwang ; Cho, Yong-Cho ; Lee, Sang-Dae ; Shim, Sang-In ; Chung, Jung-Sung ;
Weed & Turfgrass Science, volume 3, issue 4, 2014, Pages 323~328
DOI : 10.5660/WTS.2014.3.4.323
This study was conducted to find out the effects of aerial application by unmanned helicopter (AAUH) on controlling weeds under water-seeded rice cultivation. Foliar herbicide (bentazone sodium + fenoxaprop-P-ethyl) was applied with diluted 8-times (standard concentration pest control) as AAUH. Foliar herbicide treatment with standard and two times amount were little damage, but with more than three times amount showed great damage in rice growth. Six annual and two perennial weeds were major weeds occurred in the experimental paddy field. On foliar herbicide treatment 25 days after direct seeding, AAUH showed high control values against weeds (96.3% for annual weeds and 99.8% for perennial weeds). There was no significant difference in weed control values between AAUH and conventional application. There was no spray injury against rice plants with aerial application. In the experiment for good spray timing (15, 20 and 25 days after direct seeding) 15 days showed highest weed control values with 98.5% to annual weeds and 99.8% to perennial weeds and no spray injury.
Development and Characteristics of New Cultivar 'Green Ever' in Zoysiagrass
Tae, Hyun-Sook ; Hong, Beom-Seok ; Shin, Chong-Chang ; Jang, Gong-Man ; Kim, Kyung-Duck ; Park, Dae-Sup ;
Weed & Turfgrass Science, volume 3, issue 4, 2014, Pages 329~335
DOI : 10.5660/WTS.2014.3.4.329
This study was performed to study characteristics of new zoysiagarass cultivar 'Green Ever' (Plant Variety Protection Application no. 2014 - 02). 'Green Ever' was developed by selection breeding among 100 native zoysiagrasses collected in South Korea. 'Green Ever' showed specific bands (1.48 kb with OPC14 and 1.05 kb with OPD5) which were distinct from 'Anyang Joonggi' or 'Dongrae Koryogi' in RAPD analysis. 'Green Ever' was classified as Z. matrella in morphological evaluations including plant height (
), leaf width (
), height of lowest leaf (
) and seed length (
), which was similar with morphological characteristics of 'Dongrae Koryogi'. Turf quality, shoot density and chlorophyll content of 'Green Ever' were higher than them of 'Anyang Joonggi' and 'Dongrae Koryogi' under intensive management such as fairway on golf course, especially shoot densities of 'Green Ever' were excellent higher than 'Anyang Joonggi' and 'Dongrae Koryogi' during experimental periods. It could be extensively used in fairway, teeing ground of golf courses and landscape garden after further study about various environmental adaptabilities such as winter kill, wear tolerance etc.
Wetting Agent and Phosphorus for Quick Establishment of Kentucky Bluegrass
Lee, Sang-Kook ;
Weed & Turfgrass Science, volume 3, issue 4, 2014, Pages 336~341
DOI : 10.5660/WTS.2014.3.4.336
Wetting agent is a substance that reduces the soil water repellency and causes a liquid to spread more easily into the soil. Wetting agents are well known as to improve irrigation efficiency. Phosphorus is one of the 17 essential nutrient elements and promote faster seed germination. The objective of this study was to evaluate wetting agent and P rates for fast germination and establishment of Kentucky bluegrass. Three levels of wetting agent which were 0.23, 0.46, and
were applied and the P treatments were 5, 10, and
. The medium and high rate of wetting agent at the high P rate had the greatest turfgrass coverage and took 28 days to reach 50% turfgrass coverage regardless of P application. Based on this study, wetting agent is effective for fast germination and establishment of Kentucky bluegrass if sufficient phosphorus is applied.
The Effect of Thatch Decomposing by Application with Composted Liquid Manure and Microorganism Medium in Golf Course Soil
Ham, Suon Kyu ; Lim, Ji Yeon ; Lee, Yeong Min ;
Weed & Turfgrass Science, volume 3, issue 4, 2014, Pages 342~346
DOI : 10.5660/WTS.2014.3.4.342
The purpose of this experiment is for investigating how much the amino acid liquid fertilizer and composted liquid manure, culture microorganism effect on the breeding of grasses and knowing the extent of the thatch content through an analysis of the soil. For testing about soil chemical, the quality of grasses, and the extent of the thatch content in the soil, we cultivated 6 kinds of microorganisms having the effect of thatch dissolution and sprayed these 6 microorganisms with composted liquid manure and the amino acid liquid fertilizer on the place Creeping bentgrass have planted. This conduction started from June to October, 2012 and 2013 (The interval: 2 weeks). In the result of the turf growth, there is no big difference between soil chemical and trace element. And we can know Leaf Color Index, Chlorophyll Index and Root Length are almost same as among treatment. In conclusion, the mixing fertilization of culture microorganism and composted liquid manure is better effective than the traditional fertilization. And it can be expected the effect of the quality of grass and Thatch decomposition in soil.
Influence of the Composted Liquid Manure on the Turf Growth of Zoysiagrass (Zoysiagrass japonica) and Soil Properties
Ryu, Ju Hyun ; Ham, Suon Kyu ; Lee, Sang-Kook ; Kim, Ki Sun ;
Weed & Turfgrass Science, volume 3, issue 4, 2014, Pages 347~353
DOI : 10.5660/WTS.2014.3.4.347
This study was conducted to investigate the effects of composted liquid manure (CLM) on soil properties and turf quality of zoysiagrass. The CLMs were produced at 5 facilities for livestock excretions treatments located in Cheongwon, Gunwi, Iksan, Nonsan, and Yeoju in Korea, respectively. Field experiments were conducted at 5 golf courses and a sod farm located near each facility for livestock excretion treatments. Chemical fertilizer (CF) with N at
and CLMs were applied four times, respectively. The constituents of the different CLMs were variable based on when and where the fertilizer was produced. Soil K content significantly increased when the soil was treated with CLMs. The soil treated with CF showed a higher content of total P than that treated with CLM. CF and CLMs treatments significantly increased the turf color index compared with control. Tiller density and shoot dry weight of fertilized plots were also higher than those of non-fertilized plots. However, there was no significant difference in turf color index and tiller density among plots treated by CLMs or CF. The results of this study demonstrated that CLMs could be a substitute for CF.
The Effects of Biological Control using the Composted Liquid Manure on Large Patch in Zoysiagrass (Zoysia japonica)
Ryu, Ju Hyun ; Shim, Gyu Yul ; Lee, Sang-Kook ; Kim, Ki Sun ;
Weed & Turfgrass Science, volume 3, issue 4, 2014, Pages 354~361
DOI : 10.5660/WTS.2014.3.4.354
This study was conducted to investigate whether several composted liquid manures (CLMs) are useful for biological control of large patch on zoysiagrass and investigate the chemical and biological factors to suppress large patch in soil treated with CLMs. The CLMs were produced at 4 different facilities for livestock excretion treatments located in Korea. Field experiments were carried out at 5 golf courses located near each facility. CLM and Chemical fertilizer (CF: water soluble fertilizer, 20-20-20) were applied four and three times with N at
per year, respectively. There was significant increase of concentration of K, Na, and Cu of soil treated with CLM compared to CF treatment. Among experimental plots, CN and GG2 plot sites were shown significant higher effect of biological control 80% and 50% respectively against large patch disease. The number of bacteria, Actinomycetes, and fungi in soil at these sites significantly increased and fluorescein diacetate hydrolytic activity was enhanced, while the soil was treated with CLM. The results of this study demonstrated that CLM application has effect on soil to suppress large patch and reduce the use of fungicide in environment-friendly turf management.
Growth Effect and Nutrient Uptake by Application Interval of Developed Slurry Composting and Biofiltration (DSCB) Liquid Fertilizer on Kentucky Bluegrass
Ham, Suon-Kyu ; Kim, Young-Sun ;
Weed & Turfgrass Science, volume 3, issue 4, 2014, Pages 362~369
DOI : 10.5660/WTS.2014.3.4.362
A developed slurry composting and biofiltration (DSCB) liquid fertilizer could be used for eco-friendly turfgrass management in golf course. This study was conducted to evaluate the growth effect of application intervals of DSCB in Kentucky bluegrass based on turf color index, chlorophyll index, clipping yield and uptake and availability of nutrient. Treatments were designed as follows; non-fertilizer (NF), control (CF) and DSCB treatments which were applied a every 15 days (DSCB), every 30 days (2DSCB) and 60 days (4DSCB-1: April, June, August; 4DSCB-2: May, July, September). Turf color indexes of DSCB and 2DSCB were higher than CF, but these chlorophyll indexes similar to CF. The clipping yield and uptake and availability rate of nitrogen and potassium in turfgrass were increased in 2DSCB. These results suggested that application of DSCB improved turf quality and growth by prompting an uptake and availability of nutrients in Kentucky bluegrass and its application interval was 1time per month.
Effects of Cool-Season Grass Overseeding on Coverage and Spring Transition in Zoysiagrass
Jung, Ki-Wan ; Kim, Kyoung-Nam ;
Weed & Turfgrass Science, volume 3, issue 4, 2014, Pages 370~377
DOI : 10.5660/WTS.2014.3.4.370
Research was initiated to evaluate cool-season grass (CSG) overseeding effects on coverage and species transition in Korean lawngrass (Zoysia japonica Steud.) and to determine CSGs and their seeding rate for a practical overseeding. Treatments were comprised of Kentucky bluegrass (KB, Poa pratensis L.), perennial ryegrass (PR, Lolium perenne L.), tall fescue (TF, Festuca arundinacea Schreb.) and their mixtures. Significant differences were observed in turfgrass coverage and species transition. Since overseeding, the coverage was highest in PR, followed by TF and lowest in KB. The highest coverage in polystand was associated with Mixture IV (TF 50 + PR 50) at a seeding rate of
which had highest PR and TF, but without KB. Regarding turfgrass transition, zoysiagrass recovery continued to come back up to 80% from late March. But it reduced after early October. Zoysiagrass in monostand was greatest in KB and lowest in TF, but variable in polystand. For the fast and great coverage in winter, it would be the best to apply with PR at
and equal combination of PR and TF by 1/2 in the mixture at
. For the smooth spring transition to zoysiagrass, however, KB application at
First Report of Waitea Ring Patch caused by Waitea circinata on Zoysiagrass
Kim, Kyung-Duck ; Hong, Sung-Chul ; Jang, Kong-Man ; Han, Muho ; Pyee, Jae-Ho ; Park, Dae-Sup ;
Weed & Turfgrass Science, volume 3, issue 4, 2014, Pages 378~381
DOI : 10.5660/WTS.2014.3.4.378
A new pathogen was isolated from zoysiagrass-planted park of Jeju island in 2014. Symptoms appeared a type of irregular patches occurring brownish leaf blight, followed by stem and crown rot. The symptom was very similar to that of large patch caused by Rhizoctonia solani, a well-known devastating zoysiagrass disease. The isolate showed thin orange-colored mycelia and screlotia were formed on the medium based on cultural characteristics. The causal agent of the disease was finally identified as Waitea circinata by analysis of ribosomal DNA. On the inoculation test, Waitea circinatae showed strong pathogenicity to the zoysiagrass. The mycelia were obviously observed in the inoculated tissues. This is the first report of Waitea ring patch caused by Waitea circinata on zoysiagrass.