scholarly journals Antagonistic Mechanisms and Culture Conditions of Isolated Microbes Applied for Controlling Large Patch Disease in Zoysiagrass

2015 ◽  
Vol 33 (4) ◽  
pp. 492-500
Author(s):  
Young-Sun Kim ◽  
Ki-Yoon Ma ◽  
Geung-Joo Lee
Keyword(s):  
Culture Conditions ◽  
Large Patch ◽  
Patch Disease

Screening St. Augustinegrass Genotypes for Brown Patch and Large Patch Disease Resistance

Crop Science ◽  
2017 ◽  
Vol 57 (S1) ◽  
Author(s):  
Norma C. Flor ◽  
Philip F. Harmon ◽  
Kevin Kenworthy ◽  
Richard N. Raid ◽  
Russell Nagata ◽  
...  
Keyword(s):  
Disease Resistance ◽  
Large Patch ◽  
Brown Patch ◽  
Patch Disease

scholarly journals Biocontrol of Large Patch Disease in Zoysiagrass (Zoysia japonica) by Bacillus subtilis SA-15: Identification of Active Compounds and Synergism with a Fungicide

Horticulturae ◽  
2021 ◽  
Vol 8 (1) ◽  
pp. 34
Author(s):  
Young-Sun Kim ◽  
Kyo-Suk Lee ◽  
Hong-Gi Kim ◽  
Geung-Joo Lee
Keyword(s):  
Bacillus Subtilis ◽  
Mycelial Growth ◽  
Zoysia Japonica ◽  
Large Patch ◽  
Control Efficacy ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Patch Disease ◽  
Farming Soil

Bacillus subtilis SA-15 is a plant growth-promoting bacterium isolated from non-farming soil. We aimed to identify lipopeptides produced by B. subtilis SA-15 and evaluate the control efficacy of B. subtilis SA-15 against large patch disease caused by Rhizoctonia solani AG 2-2 (IV) in zoysiagrass (Zoysia japonica). Bacillus subtilis SA-15 inhibited mycelial growth of R. solani AG 2-2 (IV) in vitro and produced fengycin A and dehydroxyfengycin A, which are antifungal compounds. Fengycin A and deghydroxyfengycin A inhibited R. solani mycelial growth by 30.4 and 63.2%, respectively. We formulated B. subtilis SA-15 into a wettable powder and determined its control efficiency against large patch in a field trial. The control efficacy was 51.2–92.0%. Moreover, when B. subtilis SA-15 powder was applied together with half the regular dose of the fungicide pecycuron, the control efficacy was 88.5–100.0%. These results indicate that B. subtilis SA-15 can be used to control soil-borne diseases, including large patch caused by R. solani, because of lipopeptide production. The use of this bacterium can also reduce the amount of fungicide needed, providing an eco-friendly management option for turfgrass.

scholarly journals Influence of Management Practices on Rhizoctonia Large Patch Disease in Zoysiagrass

HortScience ◽  
1994 ◽  
Vol 29 (3) ◽  
pp. 186-188 ◽  
Author(s):  
D.E. Green ◽  
J.D. Fry ◽  
J.C. Pair ◽  
N.A. Tisserat
Keyword(s):  
Rhizoctonia Solani ◽  
Disease Severity ◽  
Management Practices ◽  
Field Studies ◽  
Large Patch ◽  
N Sources ◽  
N Source ◽  
Application Rates ◽  
Patch Disease ◽  
Preemergence Herbicides

Mowing heights from 1.2 to 5.1 cm, five N sources with two application rates (74 and 148 kg N/ha per year), and seven preemergence herbicides were evaluated in field studies in Manhattan and Wichita, Kan., for their effect on large patch disease, caused by Rhizoctonia solani Kuhn AG 2-2, in zoysiagrass (Zoysia spp.). Turf mowed at 1.2 and 2.5 cm was more severely blighted than turf mowed at 4.5 or 5.1 cm. At all mowing heights, turf recovered by August or September. Disease severity was not influenced by N source, N rate, or preemergence herbicides.

scholarly journals Characterization and Survival of Rhizoctonia solani AG2-2 LP Associated with Large Patch Disease of Zoysia Grass

Plant Disease ◽  
1998 ◽  
Vol 82 (8) ◽  
pp. 857-863 ◽  
Author(s):  
T. Aoyagi ◽  
K. Kageyama ◽  
M. Hyakumachi
Keyword(s):  
Rhizoctonia Solani ◽  
Early Spring ◽  
Optimum Temperature ◽  
Cultural Characteristics ◽  
Large Patch ◽  
Disease Occurrence ◽  
History Of ◽  
Healthy Area ◽  
Patch Disease ◽  
Irregular Cluster

Prevalence and sites of survival of Rhizoctonia solani AG2-2 LP were studied in zoysia grass for 6 years. AG2-2 LP isolates commonly were recovered over all seasons at sites with a history of large patch disease. In patch margins, AG2-2 LP isolates were recovered from crowns of zoysia grass regardless of whether the disease occurred, but were most frequently isolated from the sheath tissues during disease occurrence. In healthy sites approximately 30 cm from the patch, isolates were obtained before but not during disease occurrence. Once disease occurred, patch symptoms rapidly expanded to the edge of tissue colonized by the pathogen during autumn to early spring. To verify that the pathogen spread to healthy areas, the clonal relationship among isolates was examined using their anastomosis reaction. Isolates recovered from the patch and healthy area outside the patch were of the same clone, but isolates from different patches differed. Cultural characteristics and pathogenicity of the AG2-2 LP isolates were compared with R. solani AG2-2 IIIB and R. solani AG2-2 IV. The AG2-2 LP isolates showed an irregular cluster of mycelia (not sclerotia), an irregular zonation, dark brown main hyphae, and sparse aerial hyphae on potato dextrose agar after 4 weeks of incubation. Optimum temperature for growth was 23°C. Cultural characteristics of AG2-2 subgroups IIIB and IV differed from LP isolates. All isolates of AG2-2 LP caused moderate to high levels of disease on zoysia grass, but were nonpathogenic or caused little disease on bent grass and sugar beet. These results indicate that cultural characteristics and host range of AG2-2 LP are different than those of AG2-2 IIIB and AG2-2 IV.

First report of Rhizoctonia solani AG-2-2 IV causing large patch disease of Japanese lawn grass in India

2020 ◽  
Vol 102 (4) ◽  
pp. 1351-1352
Author(s):  
Arghya Banerjee ◽  
Saidul Islam ◽  
Koushik Banerjee ◽  
Debashis Rana ◽  
Krishna Ray ◽  
...  
Keyword(s):  
Rhizoctonia Solani ◽  
Large Patch ◽  
First Report ◽  
Patch Disease

scholarly journals Changes in Bacterial Community Structure and Enriched Functional Bacteria Associated With Turfgrass Monoculture

2021 ◽  
Vol 8 ◽  
Author(s):  
Chang-Wook Jeon ◽  
Da-Ran Kim ◽  
Eun-Ji Bae ◽  
Youn-Sig Kwak
Keyword(s):  
Community Structure ◽  
Bacterial Community ◽  
Bacterial Community Structure ◽  
Abiotic Stress Tolerance ◽  
Large Patch ◽  
Burkholderia Vietnamiensis ◽  
Functional Bacteria ◽  
Rhizosphere Bacterial Community ◽  
Patch Disease

There is increasing attention being paid to utilizing microbial communities to improve plant health while reducing management inputs. Thus, the objectives of this research were to assess changes in the rhizosphere bacterial community structure associated with long-term turfgrass monoculture and to demonstrate the feasibility of using functional bacteria as beneficial biocontrol agents. Large patch disease, caused by the fungal pathogen Rhizoctonia solani AG2-2, is a significant threat to turfgrass cultivation. Rhizosphere samples were collected from 2-, 13- and 25-year turfgrass (Zoysia japonica) monocultures. The 13-year monoculture field had a higher pathogen population density than both the 2- and 25-year monoculture fields. Analyses of the rhizosphere bacterial communities revealed that Streptomyces was dominant in the 2-year field and Burkholderia was enriched in the 25-year field. Based on the culturable rhizosphere bacteria, Streptomyces neyagawaensis J6 and Burkholderia vietnamiensis J10 were obtained from the 2- and 25-year fields, respectively. Application of S. neyagawaensis J6 and B. vietnamiensis J10 led to excellent inhibition of large patch disease as well as enhanced tolerance against drought and temperature stresses. The results showed that the selected bacteria could be developed as biocontrol and abiotic stress tolerance agents for turfgrass cultivation.

scholarly journals Biological Control of Large Patch Disease by Streptomyces spp. in Turfgrass

2016 ◽  
Vol 5 (1) ◽  
pp. 29-34
Author(s):  
Chang Wook Jeon ◽  
Jung Han Lee ◽  
Gyu Young Min ◽  
Youn-Sig Kwak
Keyword(s):  
Biological Control ◽  
Large Patch ◽  
Streptomyces Spp ◽  
Patch Disease

scholarly journals Effect of Cultivation and Timing of Nitrogen Fertilization on Large Patch Disease of Zoysiagrass

Plant Disease ◽  
2013 ◽  
Vol 97 (8) ◽  
pp. 1075-1081 ◽  
Author(s):  
Ken Obasa ◽  
Jack Fry ◽  
Dale Bremer ◽  
Rodney St. John ◽  
Megan Kennelly
Keyword(s):  
Soil Temperature ◽  
Water Content ◽  
Nitrogen Fertilization ◽  
N Fertilization ◽  
Anastomosis Group ◽  
Early Summer ◽  
Large Patch ◽  
Group 2 ◽  
Patch Disease ◽  
N Fertility

Large patch of zoysiagrass (Zoysia spp.) is caused by Rhizoctonia solani anastomosis group 2-2 LP. The effects of summer cultivation (core-aerification, verticutting, and sand topdressing) and spring and fall versus summer nitrogen (N) fertilization on large patch in fairway height ‘Meyer’ zoysiagrass were investigated from 2008 to 2011 in Manhattan, Haysville, and Olathe, KS. Disease was assessed by measuring patch diameters or analyzing digital images of affected plot areas to determine the percentage of non-green turfgrass within patches. Cultivation did not affect thatch temperature, soil temperature, soil water content, or turf recovery from large patch in early summer. Furthermore, cultivation did not result in overall significant reductions in patch diameters or average weekly rate of patch diameter increase among plots at the three experimental locations. In some site–year combinations, spring and fall N fertility was associated with lower percentages of non-green turf within affected plot areas in Manhattan and Haysville. In some cases, applications of N during spring and fall may alleviate large patch symptoms.

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