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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 5, Issue 3 - Sep 2016
Volume 5, Issue 2 - Jun 2016
Volume 5, Issue 1 - Mar 2016
Selecting the target year
Changes in Weed Vegetation in Paddy Fields over the Last 50 Years in Korea
Lee, In-Yong ; Kim, Chang-Seog ; Lee, Jeongran ; Park, Tae-Seon ; Moon, Byeng-Chul ; Park, Jae-Eup ;
Weed & Turfgrass Science, volume 5, issue 1, 2016, Pages 1~4
DOI : 10.5660/WTS.2016.5.1.1
The Rural Development Administration of Korea conducted a series of surveys of paddy weeds from 1971 to 2013 in approximately 10-year cycles and the results have been used for the efficient weed management of paddy fields. In 1971, annual weeds such as Rotala indica, Eleocharis acicularis f. longiseta, and Monochoria vaginalis were dominant. In 1981, the population of Echinochloa species decreased whereas broadleaf weeds such as M. vaginalis, Sagittaria pygmaea, and S. trifolia were dominant. In 1991, perennial weeds such as Eleocharis kuroguwai, S. pygmaea, and S. trifolia were dominant over annual weeds. In 2000, M. vaginalis was the most abundant species, followed by E. kuroguwai, Echinochloa species, and S. trifolia. In 2013, herbicide-resistant Echinochloa species and M. vaginalis were most dominant, followed by E. kuroguwai, Scirpus juncoides, and S. trifolia. It has been predicted that the prevalence of Echinochloa species will continue to increase and that perennial weeds will be more abundant than annual ones in the near future. The occurrence of herbicide-resistant weeds and exotic weeds will also increase due to global warming and changes in agricultural patterns.
A Survey of Weed Occurrence and Management on Apple Orchard Fields in Chungnam Province in Korea
Hwang, Ki Seon ; Park, Kee Woong ;
Weed & Turfgrass Science, volume 5, issue 1, 2016, Pages 5~9
DOI : 10.5660/WTS.2016.5.1.5
This survey was conducted to identify weed occurrence and to investigate weed management methods in the apple orchard fields in Chungnam province including Daejeon and Sejong from April to June and from September to October, 2015. In this survey, 64 weed species in 27 families including 39 annuals and 25 perennials were identified. Based on the importance values, the most dominant weed species in the first survey was Poa annua (6.51), followed by Veronica didyma (5.36), Plantago asiatica (5.36). In the second survey, Stellaria media (5.73), Digitaria ciliaris (5.36), and Rumex crispus (5.18) were dominant. When the 64 weed species were classified by family, the most abundant weed species belong to Compositae (12 species), followed by Poaceae (7 species), Polygonaceae (6 species), and Cruciferae (6 species). These 31 weed species in the most occurred four families accounted for 48% of total weed occurrence. Based on the questionnaire survey in which weed management methods in the apple orchard were asked, applied mowing + herbicide, mowing + tillage, and mowing + sod-culture was methods commonly conducted in apple orchard fields.
Phytosanitary Management of Dodder Seeds (Cuscuta spp.) Mixed in the Imported Seeds with the Dry Heat-treatment
Kyoung, Eun-Seon ; Moon, Kwang-Ok ; Oh, Jin-Bo ;
Weed & Turfgrass Science, volume 5, issue 1, 2016, Pages 10~16
DOI : 10.5660/WTS.2016.5.1.10
Proper actions such as discard, return or manufacturing should be taken to imported plants contaminated with quarantine weeds. Heat-treatment has been used as a processing method in many countries such as U.S., Australia, Canada as well as Korea. This study was carried to find appropriate heat-treatment methods for devitalizing dodder seeds mixed with plant seeds. Two species of dodder seeds and six imported seeds were treated for 1, 5, 10, 15, 30, 45 minutes or 1, 2, 4, 5, 6, 8 hours at the temperatures of
. According to the study, dodder seeds were devitalized at the conditions of
for 2 hours,
for 30 minutes,
for 15 minutes,
for 10 minutes and
for 5 minutes. Meanwhile, seed vigours of Cosmos bipinnatus and Callistephus chinensis had no difference when compared with untreated control at the heat-treatment conditions of
for 2 hours,
for 30 minutes.
Morphological Characteristics and Occurrence of Yellow Tuft on Zoysiagrass (Zoysia japonica) in Cultivation Fields
Cheon, Chang Wook ; Han, Jung Ji ; Kim, Dong Soo ; Kwak, Youn-Sig ; Bae, Enu Ji ;
Weed & Turfgrass Science, volume 5, issue 1, 2016, Pages 17~22
DOI : 10.5660/WTS.2016.5.1.17
Yellow tuft symptoms of a dense cluster on zoysiagrass (Zoysia japonica Steud.) occurred extensively at cultivated fields of zoysiagrass sods in Jangsung. The dense cluster of zoysiagrass showed significant morphological changes such as the tufts of shortening of internodes. The disease symptom was spread on a large scale throughout stolon nodes with multiple short leaves and it thrives in broom-like shaped clusters, exhibiting light green or yellow color on their leaves. The dense cluster of zoysiagrass had approximately 5.8 times more leaves on each node of its stolon then healthy zoysiagrass. Also, these zoysiagrass had poorly developed root and stolon caused by the tufts of a dense cluster of shoots. The dense cluster of zoysiagrass were collected for the putative causal agent incubation and upon close observation, it was found that the sporangia took the shape of a lemon, each sporangium was pointed at the end of its axis and was measured to be
. These findings were analogous to the mycological characteristics of sporangia formed by the pathogen Sclerophthora macrospora. The symptoms of yellow tuft were prevalent in spring and autumn. Therefore, this study aims to present fundamental data in relation to yellow tuft on zoysiagrass in Korea.
Observation of Scleropthora macrospora Causing Downy Mildew from Zoysiagrass with Leaf Yellowing and Excessive Tillering
Han, Muho ; Kim, Kyung-Duck ; Pyee, Jaeho ; Choi, Sumin ; Park, Dae-Sup ;
Weed & Turfgrass Science, volume 5, issue 1, 2016, Pages 23~28
DOI : 10.5660/WTS.2016.5.1.23
Zoysiagrass possessing the leaf yellowing with excessive tillers was first found in a golf course in Gyunggi province at last three to four years ago and since then have rapidly spread many golf courses in Korea. The symptom is very similar to that of yellow tuft or downy mildew, which is caused by Sclerophthora macrospora, on cool-season turfgrasses including Kentucky bluegrass and ryegrass. Microscopic study was firstly carried out to look over the presence of the pathogen in the infected leaf and stem tissues. Oospores and sporangia, reported as typical indicators of downy mildew, were obviously observed from the infected leaves. Using a set of primers based on the 18S ribosomal DNA from S. macrospora, the specific DNA fragment corresponding the gene was amplified. This study reveals that S. macrospora might be involved in spread of leaf yellowing of zoysiagrass with excessive tillers.
Biological Control of Large Patch Disease by Streptomyces spp. in Turfgrass
Jeon, Chang Wook ; Lee, Jung Han ; Min, Gyu Young ; Kwak, Youn-Sig ;
Weed & Turfgrass Science, volume 5, issue 1, 2016, Pages 29~34
DOI : 10.5660/WTS.2016.5.1.29
Large patch disease in Zoysia japonica Steud. is the most destructive disease in turfgrass. For large patch management, it has been dependent on chemical controls but pesticides are harmful to soil, water and biodiversity. In this study, we evaluated 4 Streptomyces spp. strains (S2, S5, S8 and S12) which were selected in previous studies using metagenome approaches. Root colonization of the strains, large patch suppressing effect and the pathogen density change in actual golf course were investigated to evaluate biological control potential of the strains. All strains exhibited reliable root colonization ability that strains populations were higher than
in turfgrass rhizosphere. The pathogen density, with S8 treatment, was detected average of 0.7 after a week and average of 1.2 after 4 weeks. Disease control and suppressive the pathogen population by S8 strain showed higher efficiency than other strains. S8 was applied in an actual golf course for the large patch control and pathogen density. The pathogen density in S8 treatment plot was detected below 1.6 per toothpick and lower compared with untreated plot. The results indicated that pathogen density was suppressed by S8 and the stain has great potential as a biological control agent for the large patch.
Management of Earthworm Casts using Pesticides and Tea Tree (Camellia oliefera) Extracts in Turfgrass of Golf Courses
Shin, Chong Chang ; Kim, Jong Kyung ; Choi, Sung Hwan ; Jeon, Byungduk ; Lee, Dong Woon ;
Weed & Turfgrass Science, volume 5, issue 1, 2016, Pages 35~41
DOI : 10.5660/WTS.2016.5.1.35
Earthworm cast is a harmful factor which reduces the uniformity of management of turfgrass and play quality in golf courses and playground. This research was conducted to carry out the efficacy of some pesticide (bifenthrin GR + clothianidin GR, ethoprophos GR, imidacloprid SC, picoxystrobin WG, thiophanate-methyl WP) and tee tree (Camellia oliefera) extracts against reducing earthworm cast in golf courses. All tested materials were acted reducing earthworm cast, thiophanate-methyl among them showed the highest effect reducing earthworm casts in golf courses. Tea tree extracts was occurred similar efficacy among tested chemical pesticides. However, pellet type byproduct of tea seed extract and liquid formulation of tea tree extract were better than granule formulation of them. Byproduct of tea seed and tea tree extract can be used for alternative biological management material for reducing earthworm cast in heavily casting occurrence area.
Growth of Creeping Bentgrass by Application of Compound Fertilizer Containing Microbes
Kim, Young-Sun ; Lee, Chang-Eun ; Ham, Soun-Kyu ; Lee, Geung-Joo ;
Weed & Turfgrass Science, volume 5, issue 1, 2016, Pages 42~50
DOI : 10.5660/WTS.2016.5.1.42
Superintendents have been used microbial fertilizers to improve turfgrass growth and quality and to decrease turfgrass diseases in golf course. This study was conducted to investigate the effects of compound fertilizer containing microbe (MF) on the growth and quality of creeping bentgrass with turf color index (TCI), chlorophyll index (ChI), root length, turfgrass density, clipping yield and nutrient content. Treatments were designed as follows; non-fertilizer (NF), compound fertilizer (21-17-17; CF) as control, compound fertilizer (14-6-17) containing microbe. In pot experiment, TCI and ChI of creeping bentgrass in MF plot were similar to those in CF. But clipping dry weight of MF plot increased by 39.1% compared to that of CF plot. At field experiment applied with MF treatment, TCI, ChI, root length, and nutrient content and uptake of creeping bentgrass were similar to those with CF treatment, but turfgrass density with MF higher about 7.9-15.8% than with CF. These results indicated that the application of MF improved growth and quality of creeping bentgrass by enhancing clipping yield and shoot number.