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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Summerlin, J. R. Jr.;
Coble, H. D.;
Yelverton, F. H. |
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| Author Affiliation: | Crop Science Department, North Carolina State University, Raleigh, NC |
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| Title: | Impact of mowing on growth and spread of green kyllinga (Kyllinga brevifolia) and yellow nutsedge |
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| Meeting Info.: | 51st Annual Meeting, Birmingham, AL, January 26-28, 1998 |
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| Source: | Southern Weed Science Society Proceedings. Vol. 51, 1998, p. 70-71. |
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| Publishing Information: | Champaign, IL: Southern Weed Science Society. |
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| # of Pages: | 2 |
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| Keywords: | TIC Keywords: Kyllinga brevifolia; Cyperus esculentus; Mowing; Growth; Mowing height; Mowing frequency; Golf fairways; Golf rough; Rhizome growth; Internode length; Internodes; Tubers; Spread
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| Abstract/Contents: | "Perennial sedges are troublesome, difficult to control weeds in turfgrass in the United States. Within the past decade, localized populations of green kyllinga have spread and now infest large areas of southern turfgrass. Meanwhile, yellow nutsedge populations have continued to be problematic pests for turfgrass managers. High maintenance turfgrass areas such as golf courses, athletic fields, and home lawns have provided excellent habitats for sedge populations. The frequent mowing that is common in these areas has not appeared to dramatically reduce the densities of these problematic sedges. Field experiments were conducted to evaluate the responses of green kyllinga and yellow nutsedge to mowing at heights and frequencies common to golf course fairway and rough areas. Research trials were located at the Sandhills Research Station near Jackson Springs, NC during the 1996 and 1997 summer turfgrass seasons. Green kyllinga plant specimens were collected from Fairfield Harbor Country Club near New Bern, NC and yellow nutsedge tubers were purchased from Azlin seed company of Leland, Mississippi. Mowing heights and frequencies were selected to be consistent with those of bermudagrass fairway (1.3 cm, three times per week) and rough areas (3.8 cm, once a week). A non-mowed check was included for comparison purposes. Plots were arranged in a split-plot experimental design with four replications. Shoot number and plant spread were evaluated at regular intervals during the growing season. At the end of each season plants were excavated and further evaluations were conducted. Green kyllinga plants wre measured for total rhizome length (TRL) and internode length (IL) and total node number was calculated by dividing TRL by IL. Yellow nutsedge was futher evaluated for the number of tubers produced by each plant and tuber size. Appropriate ANOVA comparisons were made to test for differences in the overall growth curves for shoot number and plant spread. Measurements and counts of excavated plant material were subjected to ANOVA analysis and separated by Fisher's protected LSD at the 0.05 level of significance. Mowing treatments had no effect on the overall growth of green kyllinga in 1996. Shoot number and green kyllinga spread remained constant over time for the two treatments and the non-mowed check. Total rhizome length, internode length and total node number were not different. In 1997, mowing effects were observed for shoot number and plant spread. Mowing at 1.3 cm three times per week reduced overall shoot production 50% and slowed green kyllinga spread 30% at 18 weeks after initial treatment. The 3.8 cm mowing treatment produed no differences when compared to the non-mowed check and growth curves for shoot number and pant spread paralleled that of the non-mowed check. Total rhizome length was the greatest for the non-mowed check and the 3.8 cm mowing treatment. Internonde length was reduced when green kyllinga was mowed at 1.3 cm, resulting in no difference in the total number of nodes found on each plant. Shoot removal via mowing reduced yellow nutsedge shoot number and plant spread in 1996. More profound but statistically similar results were found in 1997. In both years, shoot number at the point of maximum vegetation was reduced by 93% for the 1.3 cm mowing treatment and by more than 75% for the 3.8 cm treatment. Likewise, plant spread was reduced by more than 77 an 60% for the two respective treatments. No tubers were found on plants subjected to the two mowing treatments in either year. The non-mowed check produced means of 27 and 451 tubers in 1996 and 1997, respectively." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Summerlin, J. R. Jr., H. D. Coble, and F. H. Yelverton. 1998. Impact of mowing on growth and spread of green kyllinga (Kyllinga brevifolia) and yellow nutsedge. South. Weed Sci. Soc. Proc. 51:p. 70-71. |
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MSU catalog number: SB 611 .S6 v.51 |
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