Full TGIF Record # 63090
Item 1 of 1
Publication Type:
i
Report
Content Type:Abstract or Summary only
Author(s):Cummings, H. D.; Yelverton, F. H.; Ruffy, T. W.
Author Affiliation:North Carolina State University, Raleigh, NC 27695-7620
Title:Rooting of creeping bentgrass in response to plant growth regulators and preemergence herbicides
Section:Weed management in turf, pastures and rangeland
Other records with the "Weed management in turf, pastures and rangeland" Section
Meeting Info.:52nd Annual Meeting, Greensboro, NC, January 25-27, 1999
Source:Southern Weed Science Society Proceedings. Vol. 52, 1999, p. 71-72.
Publishing Information:Champaign, IL: Southern Weed Science Society.
# of Pages:2
Keywords:TIC Keywords: Agrostis stolonifera; Root growth; Growth regulators; Preemergence herbicides; Transition zone; Dithiopyr; Bensulide; Oxadiazon; Eleusine indica; Control; Crabgrass control; Paclobutrazol; Cyproconazole; Poa annua control; Cell division; Weed control; Biomass; Turf recovery; Application methods; Application rates; Application timing; Soil profiles; Root weight; Herbicide evaluation; Lateral growth
Facility Names:Sandhills Research Station, in Pinehurst, North Carolina
Cultivar Names:Penncross
Abstract/Contents:"Maximum root growth of creeping bentgrass (Agrostis palustris Huds.) in North Carolina occurs in the spring and fall. The majority of creeping bentgrass roots die during the summer months in the transition zone. Preemergence (PRE) herbicides like dithiopyr and bensulide + oxadiazon may be applied in the spring to control goosegrass (Eleusine indica) and crabrass (Digitaria sp.). Plant growth regulators (PGRs) like paclobutrazol and paclobutrazol + cyproconazole (fungicide with PGR properties) may be applied in the spring and fall to control annual bluegrass (Poa annua ssp. annua). Trinexapac-ethyl is a PGR which may be applied in the spring and fall for creeping bentgrass growth management. Using PRE herbicides, which inhibit cell division at the growing points, or PGRs, which inhibit cell division and cell elongation, may impact creeping bentgrass rooting during its maximum growth period. If creeping bentgrass rooting is inhibited, its ability to survive the stress of summer in the `Transition Zone' may be compromised, leaving the turf canopy open and susceptible to colonization by weeds. The objectives of this experiment were to determine the relative effects of PGRs and PRE herbicides on root biomass production and lateral recovery of creeping bentgrass and to determine if these treatments affect the ability of creeping bentgrass to survive the sress of summer in NC. The experiment was conducted using a randomized complete block design with 4 replications on established `Penncross' creeping bentgrass, maintained at 4 mm at the Sandhills Research Station near Pinehurst, NC. The PRE herbicides were applied using a shaker can on April 8, 1998 at the following rates: dithiopyr (1 EC) at 0.56 kg ai/ha and bensulide + oxadiazon (6.56 G) at 6.7 and 1.7 kg ai/ha, respectively. PGRs were applied using a CO₂ backpack sprayer once a month beginning on April 8, 1998 at the following rates: trinexapac-ethyl (1 EC) at 0.06 kg ai/ha or at 0.12 kg ai/ha, paclobutrazol (2 SC) at 0.28 kg ai/ha, and paclobutrazol (2 SC) + cyproconazole (40 WG) at 0.28 kg ai/ha + 1.0 kg ai/ha, respectively. Cyproconazole was applied two weeks after paclobutrazol. Every month, two soil cores (10cm in diameter x 15 cm in length) were collected from each plot using a standard golf cup cutter. The soil was washed away using a sift, and the roots were dried in a drying oven. The root dry weights were determined and the samples were placed in a muffle furnace for 12 hours at 500 °C. The organic weight of the roots was determined by subtracting the ash weight from the dry weight. Lateral growth of the creeping bentgrass into each cup cutting was measured every two weeks until complete closure with a 15 cm ruler. Diameter measurements were made in three directions from crown to crown (growing point to growing point). The results of the root biomass measurements indicated that neither preemergence herbicides nor plant growth regulators inhibited the ability of `Penncross" creeping bentgrass to produce root biomass. The results of lateral recovery measurements indicated that while neither preemergence herbicides nor trinexapac-ethyl inhibited the ability of `Penncross' creeping bentgrass to spread laterally during the summer months, paclobutrazol + cyproconazole did inhibit this form of growth. Paclobutrazol, compared to trinexapac-ethyl at 0.12 kg ai/ha, also inhibited the ability of `Penncross' creeping bentgrass to spread laterally during the summer months; however, neither of these treatments were significantly different from the non-treated".
Language:English
References:0
See Also:Other items relating to: P G Rs 1997-2006
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Cummings, H. D., F. H. Yelverton, and T. W. Ruffy. 1999. Rooting of creeping bentgrass in response to plant growth regulators and preemergence herbicides. South. Weed Sci. Soc. Proc. 52:p. 71-72.
Fastlink to access this record outside TGIF: https://tic.msu.edu/tgif/flink?recno=63090
If there are problems with this record, send us feedback about record 63090.
Choices for finding the above item:
Find Item @ MSU
MSU catalog number: SB 611 .S6 v.52
Request through your local library's inter-library loan service (bring or send a copy of this TGIF record)