scholarly journals Effects of growing degree day based trinexapac-ethyl application on ultradwarf hybrid bermudagrass putting green quality and ball roll

itsrj ◽  
2021 ◽  
Author(s):  
Devon E. Carroll ◽  
James T. Brosnan ◽  
Eric H. Reasor ◽  
James P. Kerns ◽  
Cameron M. Stephens ◽  
...  
Keyword(s):  
2002 ◽  
Vol 127 (2) ◽  
pp. 224-229 ◽  
Author(s):  
Maxim J. Schlossberg ◽  
Keith J. Karnok ◽  
Gil Landry

Subjection of intensively managed creeping bentgrass [Agrostis stolonifera L. var. palustris (Huds.). Farw., (syn. Agrostis palustris Huds.)] to supraoptimal soil temperatures is deleterious to root viability and longevity. The ability to estimate viable root length would enable creeping bentgrass managers to more accurately schedule certain management practices. The purpose of this rhizotron study was to develop a model, based on an accumulated degree-day (ADD) method, capable of estimating viable root length density of established `Crenshaw' and `L93' creeping bentgrass maintained under putting green conditions. Viable root length density observations were made biweekly and soil temperature data collected April through September 1997, and January through August 1998 and 1999. Relative viable root length density (RVRLD) is defined as the measured viable root length density divided by the maximum density attained that spring. In both years, maximum annual viable root length density for all plots was reached, on average, by 138 days from the beginning of the year (18 May). Cultivar and year effects were nonsignificant (P = 0.67 and 0.20, respectively). Degree-day heat units were calculated using an array of base temperatures by integral and arithmetical methods. Although the two accumulative methods proved suitable, the model regressing arithmetical degree-day accumulations against the bentgrass RVRLD provided a better fit to the data set. Use of the 10 °C base temperature in the arithmetical ADD calculations provided the following model; RVRLD = 0.98 - [1.30 × 10-4 (ADD)], accounting for 83.8% of the experimental variability (P < 0.0001). As several abiotic/edaphic factors have been shown to significantly influence root growth and viability, development of a widely usable model would include additional factors.


itsrj ◽  
2017 ◽  
Vol 13 (1) ◽  
pp. 264
Author(s):  
Douglas T. Linde ◽  
Andrew D. Mitchell ◽  
Brendan Hannan
Keyword(s):  

itsrj ◽  
2021 ◽  
Author(s):  
Xiao Kemeng ◽  
Karin Juul Hesselsøe ◽  
Christer Magnusson ◽  
Tatsiana Espevig ◽  
Trond Pettersen ◽  
...  

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Babasaheb B. Fand ◽  
V. S. Nagrare ◽  
S. K. Bal ◽  
V. Chinna Babu Naik ◽  
B. V. Naikwadi ◽  
...  

An amendment to this paper has been published and can be accessed via a link at the top of the paper.


Ecology ◽  
1978 ◽  
Vol 59 (3) ◽  
pp. 431-433 ◽  
Author(s):  
Sherwood B. Idso ◽  
Ray D. Jackson ◽  
Robert J. Reginato

2008 ◽  
Vol 99 (1) ◽  
pp. 65-72 ◽  
Author(s):  
N.N. Gómez ◽  
R.C. Venette ◽  
J.R. Gould ◽  
D.F. Winograd

AbstractPredictions of survivorship are critical to quantify the probability of establishment by an alien invasive species, but survival curves rarely distinguish between the effects of temperature on development versus senescence. We report chronological and physiological age-based survival curves for a potentially invasive noctuid, recently described as Copitarsia corruda Pogue & Simmons, collected from Peru and reared on asparagus at six constant temperatures between 9.7 and 34.5°C. Copitarsia spp. are not known to occur in the United States but are routinely intercepted at ports of entry. Chronological age survival curves differ significantly among temperatures. Survivorship at early age after hatch is greatest at lower temperatures and declines as temperature increases. Mean longevity was 220 (±13 SEM) days at 9.7°C. Physiological age survival curves constructed with developmental base temperature (7.2°C) did not correspond to those constructed with a senescence base temperature (5.9°C). A single degree day survival curve with an appropriate temperature threshold based on senescence adequately describes survivorship under non-stress temperature conditions (5.9–24.9°C).


Author(s):  
Hevellyn Talissa dos Santos ◽  
Cesar Augusto Marchioro

Abstract The small tomato borer, Neoleucinodes elegantalis (Guenée, 1854) is a multivoltine pest of tomato and other cultivated solanaceous plants. The knowledge on how N. elegantalis respond to temperature may help in the development of pest management strategies, and in the understanding of the effects of climate change on its voltinism. In this context, this study aimed to select models to describe the temperature-dependent development rate of N. elegantalis and apply the best models to evaluate the impacts of climate change on pest voltinism. Voltinism was estimated with the best fit non-linear model and the degree-day approach using future climate change scenarios representing intermediary and high greenhouse gas emission rates. Two out of the six models assessed showed a good fit to the observed data and accurately estimated the thermal thresholds of N. elegantalis. The degree-day and the non-linear model estimated more generations in the warmer regions and fewer generations in the colder areas, but differences of up to 41% between models were recorded mainly in the warmer regions. In general, both models predicted an increase in the voltinism of N. elegantalis in most of the study area, and this increase was more pronounced in the scenarios with high emission of greenhouse gases. The mathematical model (74.8%) and the location (9.8%) were the factors that mostly contributed to the observed variation in pest voltinism. Our findings highlight the impact of climate change on the voltinism of N. elegantalis and indicate that an increase in its population growth is expected in most regions of the study area.


1998 ◽  
Vol 32 (1) ◽  
pp. 43-52 ◽  
Author(s):  
David J. Sailor
Keyword(s):  

2007 ◽  
Vol 16 (1) ◽  
pp. 57-69 ◽  
Author(s):  
Halldor Bjornsson ◽  
Einar Orn Olason ◽  
Trausti Jónsson ◽  
Steen Henriksen
Keyword(s):  

Sign in / Sign up

Export Citation Format

Share Document