Full TGIF Record # 310267
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Web URL(s):https://scisoc.confex.com/scisoc/2019am/meetingapp.cgi/Paper/122210
    Last checked: 02/03/2020
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Publication Type:
Content Type:Abstract or Summary only
Author(s):Elmore, Matthew T.; Tuck, Daniel P.; Diehl, Katherine H.
Author Affiliation:Department of Plant Biology, Rutgers University, New Brunswick, NJ
Title:False-green kyllinga (Kyllinga gracillima) freeze tolerance is affected by herbicide treatment
Section:C05 turfgrass science
Other records with the "C05 turfgrass science" Section

Turfgrass pest management oral II: Diseases, insects, and weeds
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Meeting Info.:San Antonio, Texas: November 10-13, 2019
Source:ASA, CSSA and SSSA International Annual Meetings. 2019, p. 122210.
Publishing Information:[Madison, Wisconsin]: [American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America]
# of Pages:1
Keywords:TIC Keywords: Cold acclimation; Cold resistance; Cultivar evaluation; Halosulfuron-methyl; Herbicide evaluation; Kyllinga gracillima
Abstract/Contents:"False-green kyllinga (Kyllinga gracillima Miq.) is a warm-season perennial weed that emerges from rhizomes in the spring. The freeze tolerance of these rhizomes may determine whether perennial populations can establish in colder climates. The objective of this research was to determine the freeze tolerance of a false-green kyllinga population in a controlled environment. A second objective was to determine whether halosulfuron-methyl herbicide applied prior to a freezing period affects freeze tolerance. A false-green kyllinga population was sampled from a turfgrass sward in New Jersey and propagated via rhizomes in the greenhouse. Rhizomes were cut into fragments with 8 to 10 nodes for planting to conetainers filled with silica sand and loam soil in a 4:1 ratio. Five rhizomes were planted to each conetainer. Plants were maintained in a greenhouse to acclimate after which time selected plants were treated with a sub-lethal rate of halosulfuron-methyl (17 g ha-1). Three weeks after halosulfuron-treatment, plants were cold acclimated in a controlled environment chamber by gradually reducing the temperature from 25/20°C day/night to 5/-1°C over a four week period. At the conclusion of the cold acclimation period, the air temperature in the chamber was reduced linearly by 1°C per hour as conetainers were removed at the appropriate intervals between -1 and -10°C. Conetainers were re-acclimated at 1°C for 24 h before transfer to a greenhouse where five rhizomes were planted to flats. Survival of individual rhizomes and shoot biomass were assessed after 5 weeks. This experiment was repeated in time and data were combined. Percent rhizome survival was subjected to non-linear regression to determine the freeze tolerance (LT50). False-green kyllinga treated with halosulfuron had greater freeze tolerance (-8°C) than non-treated plants (-6°C). For both treatments, rhizome survival was 100% at -2°C and 0% at -10°C."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Elmore, M. T., D. P. Tuck, and K. H. Diehl. 2019. False-green kyllinga (Kyllinga gracillima) freeze tolerance is affected by herbicide treatment. Agron. Abr. p. 122210.
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