| |
| Publication Type:
| Refereed |
|---|
| Author(s): | Johnson, B. Jack;
Duncan, Ronny R. |
|---|
| Author Affiliation: | Johnson: Professor Emeritus, Department of Crop and Soil Sciences, University of Georgia, Griffin, Georgia; and Duncan: Professor, Department of Crop and Soil Sciences, University of Georgia, Griffin, Georgia |
|---|
| Title: | Influence of plant growth regulators and herbicides on suppression of bermudagrass in seashore paspalum |
|---|
| Source: | Journal of Environmental Horticulture. Vol. 21, No. 3, September 2003, p. 162-168. |
|---|
| Publishing Information: | Washington, DC: Horticultural Research Institute |
|---|
| # of Pages: | 7 |
|---|
| Keywords: | TIC Keywords: Growth regulators; Herbicides; Cynodon; Cynodon dactylon; Cynodon transvaalensis; Encroachment; Paspalum vaginatum; Ethofumesate; Flurprimidol; Tank mix; Bermudagrass control; Application rates; Herbicide combinations
|
|---|
| Cultivar Names: | Sea Isle I; Tifway; TifSport; Sea Isle 2000; Adalayd; Excalibur |
|---|
| Trade Names: | Prograss; Cutless |
|---|
| Abstract/Contents: | "Bermudagrass encroachment into seashore paspalum continues to be a concern on golf courses, athletic fields, and other turf areas. Four field experiments were conducted in Georgia during 2000 through 2002 to determine timing, rates, and frequency of chemical treatments needed to suppress bermudagrass and determine tolerance of paspalum. Prograss applied in multiple applications during spring and summer months did not suppress bermudagrass cultivars as effectively as did tank-mixes of Prograss + Cutless. Prograss applied at the X rate [1.7 kg/ha (1.5 lb ai/A)] in four or five applications per year resulted in < 70% bermudagrass suppression on 52% of the rating dates while the injury to paspalum cultivars was > 40% at one-half the dates. Bermudagrass suppression was not consistent throughout the three year period when treated with Prograss + Cutless. However, the suppression was equal to or higher when Prograss + Cutless were applied initially at the ¾X [1 X= 1.7 + 0.84 kg/ha (1.5 + 0.75 lb ai/A)] and followed by three to four additional ½ X applications during the spring and summer than other rates. By late summer in 2000 and 2001, the suppression of common bermudagrass from the tank-mixed treatments was ≤ 70% more times than either Tifway or TifSport bermudagrass. In some instances, the treatments caused > 40% injury to different paspalum cultivars at sometime during the spring and summer of each year. This was true when the initial ¾ X rate was followed by multiple ½ X rates. By late summer the injury to Sea Isle I was 65% in 2001 but only 40% in 2002. The injury to Sea Isle I during spring and summer was > 40% at 10 of 16 rating dates in 2001, but only once in 2002. In contrast, the injury to Sea Isle 2000 by late summer was 38% in 2001 and 15% in 2002, but did not exceed the 40% anytime either year. Injury to Excalibur also varied from the same Prograss + Cutless treatments and it was > 40% at 11 of 16 rating dates in 2001, but did not exceed the 40% at anytime during 2002. Even through injury to paspalum was > 40% from these rates for a number of dates during spring and summer, it was within an acceptable range (≤ 40%) for all cultivars by late summer except Sea Isle I in 2001 (65%). Tank-mixes of Prograss + Primo did not improve bermudagrass suppression when compared with tank-mixes of Prograss + Cutless. The safety of paspalum cultivars to tank-mixes of Prograss + Cutless was not improved with Fe + N compared with Prograss + Cutless alone. All Envoy, Arsenal, Fusilade, and Prograss + Fusilade treatments severely injured (> 70%) all paspalum cultivars and should not be applied to a mixed bermudagrass - paspalum turf for bermudagrass suppression." |
|---|
| Language: | English |
|---|
| References: | 11 |
|---|
| See Also: | Other items relating to: Seashore Paspalum - Since 2000
Other items relating to: P G Rs 1997-2006 |
|---|
| Note: | Tables |
|---|
| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Johnson, B. J., and R. R. Duncan. 2003. Influence of plant growth regulators and herbicides on suppression of bermudagrass in seashore paspalum. J. Environ. Hortic. 21(3):p. 162-168. |
| Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=91351 |
| If there are problems with this record, send us feedback about record 91351. |
| Choices for finding the above item: |
|---|
| 
MSU catalog number: SB 118.48 .J68 |
| Request through your local library's inter-library loan service (bring or send a copy of this TGIF record) |
