Full TGIF Record # 229541
Item 1 of 1
Publication Type:
i
Report
Author(s):Dickens, R.
Author Affiliation:Auburn University
Title:Discussion V: Centipedegrass decline
Meeting Info.:Texas A&M University Research and Extension Center, Dallas, Texas: June 4-7 1986
Source:1986 Southern Turf Research Information ExchangeGroup. 1986, p. 16-17.
# of Pages:2
Publishing Information:s.l.: Southern Research Information Exchange Group
Abstract/Contents:"'Centipedegrass decline' is a term used to describe a phenomenon which results in varying degrees of stand reductions in established centipedegrass turf. Two distinct types of centipedegrass decline have been identified. Type I decline occurs when grass is lost during the winter months in a typical winterkill or cold stress scenario. With Type II decline, the grass survives the winter and initiates new growth in the spring only to die rapidly a few weeks later. Type I decline is more common in the northern portions of the centipede growing areas, while Type II response is more likely to occur in the warmer regions. Considerable research has been conducted on the effects of management practices on Type I decline of centipedegrass. Nitrogen fertility and mowing heights have been the most influential factors in winter survival studies in Mississippi, Alabama, and Georgia. Mowing heights of 2.5 to 3.8 cm results in better survival than higher heights of cut. Nitrogen rates in excess of 1.5 kg/100 square meters resulted in decreased cold tolerance and increased winterkill in Alabama studies. In a Florida study increasing potassium fertility levels resulted in more chlorosis and poorer survival of centipedegrass. Excessive soil phosphorus has been shown to increase spring chlorosis, especially under alkaline soil conditions, but its effects on cold tolerance and winter survival are not clear at this time. Investigators have studied the effects of turf pests on centipedegrass decline, primarily in the Type II situation. Georgia workers found that ring nematodes were the most abundant species in centipedegrass, but no firm correlation between nematodes and centipedegrass decline was established. Fusarium roseum was found to be associated with Type II decline in southern Alabama. Observations over the past several years seem to indicate a relationship between late spring frosts or freezes and the occurrence of centipedegrass declince. At the present time preventative measures, including lower mowing heights and moderate rates of nitrogen fertilization, are the most common recommendations for this problem."
Language:English
References:5
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Dickens, R. 1986. Discussion V: Centipedegrass decline. 1986 Southern Turf Research Information ExchangeGroup. p. 16-17.
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