scholarly journals The impact of tall fescue (Festuca arundinacea) endophyte (Neotyphodium spp) on nontarget soil nematodes

2005 ◽  
Vol 58 ◽  
pp. 112-116 ◽  
Author(s):  
N.L. Bell
Keyword(s):  
Tall Fescue ◽  
Festuca Arundinacea ◽  
Nontarget Effects ◽  
Endophyte Infection ◽  
Neotyphodium Endophyte ◽  
Nematode Abundance ◽  
A Site ◽  
The Impact ◽  
Field Plots ◽  
Nematode Fauna

Nontarget effects of Neotyphodium endophyte infection in fieldsown tall fescue were studied as a model for investigating nontarget effects of geneticallymodified plants Two strains of Neotyphodium endophyte (AR501 and AR542) in tall fescue at a site near Palmerston North (Aorangi) and one strain (AR501) at a site near Lincoln were sampled in March and April 2002 respectively The only consistent effect of either endophyte strain on nematode abundance was an increase of large omnivorous nematodes beneath AR501 tall fescue at both sites This was reflected in omnivorous nematodes constituting a significantly greater proportion of the nematode fauna over the two sites The nematode results show that relatively minor effects on this component of soil biota were observed as a result of plant changes associated with endophyteinfection even after longterm growth in field plots

scholarly journals Impact of Mowing Height and Nitrogen Fertility on Crabgrass Cover in ‘RTF' Tall Fescue1

2018 ◽  
Vol 36 (3) ◽  
pp. 104-107
Author(s):  
Matthew Cutulle ◽  
Jeffrey Derr ◽  
David McCall ◽  
Adam Nichols ◽  
Brandon Horvath
Keyword(s):  
Tall Fescue ◽  
Festuca Arundinacea ◽  
Fertilization Rate ◽  
Aesthetic Value ◽  
Virginia Beach ◽  
Nitrogen Fertility ◽  
The Aesthetic ◽  
And Function ◽  
The Impact ◽  
Schedonorus Phoenix

Abstract Tall fescue (Festuca arundinacea Shreb.) has exceptional utility as a low maintenance lawn in the transition zone. However, during the summer smooth crabgrass [Digitaria ischaemum (Schreb.) Schreb. ex Muhl.] infestations can reduce the aesthetic value and function of the turf and lead to a thinning of the tall fescue stand, noticeable after the crabgrass plants have senesced. Research was conducted to evaluate the impact of mowing height and nitrogen fertility on smooth crabgrass plant counts and tall fescue cover in Virginia Beach, VA. Plots were mowed at either 6 cm (2.5 in) or 10 cm (4 in) and received 49, 171, or 220 kg of nitrogen annually per hectare (44, 152, and 196 lb.A−1). Mowing at 10 cm with the highest level of fertility resulted in the most turfgrass cover among all the treatment combinations. Mowing at 10 cm as opposed to 6 cm resulted in less smooth crabgrass plants, regardless of nitrogen fertilization rate. Index words: fertilization, turfgrass, weed control. Species used in this study: Smooth crabgrass [Digitaria ischaemum (Schreb.) Schreb. ex Muhl.]; tall fescue [Festuca arundinacea Shreb. synonym Schedonorus phoenix (Scop.) Holub].

scholarly journals Colorant Application Volume and Color Persistence on a ‘Chisholm’ Zoysiagrass Lawn

2016 ◽  
Vol 26 (3) ◽  
pp. 314-319 ◽  
Author(s):  
Ross Braun ◽  
Jack Fry ◽  
Megan Kennelly ◽  
Dale Bremer ◽  
Jason Griffin
Keyword(s):  
Transition Zone ◽  
Tall Fescue ◽  
Festuca Arundinacea ◽  
Warm Season ◽  
Canopy Temperature ◽  
Cool Season ◽  
Green Color ◽  
Visual Rating ◽  
The Impact ◽  
Application Volume

Zoysiagrass (Zoysia sp.) is a warm-season turfgrass that requires less water and fewer cultural inputs than cool-season grasses, but its widespread use by homeowners in the transition zone may be limited because of its extended duration of brown color during dormancy. Turf colorants are an option for improving zoysiagrass winter color. Our objective was to quantify the impact of colorants applied in autumn at three application volumes on persistence of green color on lawn-height ‘Chisholm’ zoysiagrass (Zoysia japonica). The commercial colorants Green Lawnger, Endurant, and Wintergreen Plus were applied in Oct. 2013 in Manhattan, KS, and Haysville, KS, in solutions with water at 80, 160, or 240 gal/acre at a 1:6 dilution (colorant:water) and evaluated through late 2013 and Spring 2014. Tall fescue (Festuca arundinacea), a cool-season turfgrass commonly used in home lawns in the transition zone, was included for comparison. Persistence of green color increased with application volume, but differences among colorants were limited. Colorants provided acceptable color (i.e., a visual rating ≥6 on a 1 to 9 scale) for 55 to 69 days at 80 gal/acre, 69 to 118 days at 160 gal/acre, and 118 to 167 days at 240 gal/acre. Compared with tall fescue, colorant-treated zoysiagrass had significantly higher color ratings for 98 to 112 days at 80 gal/acre, 112 to 154 days at 160 gal/acre, and 138 to 154 days at 240 gal/acre. Colorants increased turfgrass canopy temperature by up to 12.1 °F, but did not accelerate spring green-up. Duration of acceptable color on ‘Chisholm’ zoysiagrass lawns can be enhanced by increasing colorant application volume.

scholarly journals Soil biota associated with endophyteinfected tall fescue in the field

2005 ◽  
Vol 58 ◽  
pp. 117-121
Author(s):  
A.J. Popay ◽  
J.G. Jensen
Keyword(s):  
Arbuscular Mycorrhiza ◽  
Tall Fescue ◽  
Festuca Arundinacea ◽  
Soil Samples ◽  
Soil Biota ◽  
Costelytra Zealandica ◽  
Neotyphodium Endophyte

Invertebrates present in soil samples taken from plots of tall fescue (Festuca arundinacea) infected with two nontoxic strains of Neotyphodium endophyte (AR501 and AR542) at Aorangi near Palmerston North and one strain (AR501) at Lincoln in Canterbury together with endophytefree controls at both sites were determined in autumn 2002 Roots taken from these samples were stained and checked for the presence of arbuscular mycorrhiza At Lincoln numbers of root aphid (Aploneura lentisci) associated with plants infected with AR501 were significantly less than those on endophytefree plants while grass grub numbers (Costelytra zealandica) did not differ between treatments Beneficial invertebrates Collembola mites and earthworms were not affected by endophyte at either site and neither was colonisation of roots by mycorrhiza

scholarly journals Neonicotinoid insecticides disrupt predation on the eggs of turf-infesting scarab beetles

2010 ◽  
Vol 100 (6) ◽  
pp. 689-700 ◽  
Author(s):  
D.C. Peck ◽  
D. Olmstead
Keyword(s):  
Popillia Japonica ◽  
Soil Arthropods ◽  
Unintended Effects ◽  
Japanese Beetle ◽  
Application Timing ◽  
Nontarget Effects ◽  
Functional Consequences ◽  
Egg Removal ◽  
The Impact ◽  
Field Plots

AbstractTurfgrass applications of imidacloprid were previously shown to suppress the abundance of certain soil arthropods. To ascertain whether those impacts harbor functional consequences, the effect of neonicotinoids on Japanese beetle (Popillia japonica Newman) predation was examined in three experiments that measured removal of eggs implanted into non-irrigated field plots. A first experiment confirmed that a single imidacloprid application reduced the abundance of nontarget fauna and the rate of egg removal. A second experiment compared the impacts of imidacloprid with those of three other neonicotinoids, while a third measured the impact of imidacloprid when applied in July, August or September. Egg removal declined 28.3–76.1% in imidacloprid-treated plots across all studies. Effects were detected as early as one week after treatment (WAT) and persisted as long as four WAT. The extent of suppression did not vary across month of application. Clothianidin, dinotefuran and thiamethoxam also suppressed egg removal, and the effects were similar among them and with imidacloprid. There was no discernible association between variation in rainfall and treatment effects, but this was not explicitly tested. Results support the hypotheses that a single neonicotinoid application can suppress predation on pest populations and that the effect does not vary with respect to active ingredient or season of application. Neonicotinoid application at the time of beetle oviposition puts intended effects (mortality of neonates) in conflict with unintended effects (disruption of egg predation). The conservation of predation on early life stages might buffer the reduced efficacy of late season applications that target more advanced instars. As application timing and post-application irrigation affect insecticide performance, they might also be manipulated to reduce nontarget effects.

Neotyphodium endophyte infection affects the performance of tall fescue in temperate region Andisols

2006 ◽  
Vol 52 (1) ◽  
pp. 23-28 ◽  
Author(s):  
M. Hasinur Rahman ◽  
Suguru Saiga ◽  
Shamima Sabreen ◽  
Yukinobu Kodama ◽  
Mikinori Tsuiki
Keyword(s):  
Tall Fescue ◽  
Temperate Region ◽  
Endophyte Infection ◽  
Neotyphodium Endophyte

scholarly journals The impact of tall fescue (Festuca arundinacea) endophyte (Neotyphodium spp) on non target soil microorganisms

2004 ◽  
Vol 57 ◽  
pp. 329-336 ◽  
Author(s):  
S. Sayer ◽  
G. Burch ◽  
S.U. Sarathchandra
Keyword(s):  
Microbial Biomass ◽  
Functional Diversity ◽  
Tall Fescue ◽  
Festuca Arundinacea ◽  
Soil Microorganisms ◽  
Soil Microbial Biomass ◽  
Rhizosphere Soil ◽  
Microbial Biomass C ◽  
Soil Microbial ◽  
The Impact

The impact of two strains of the tall fescue (Festuca arundinacea) endophyte (Neotyphodium spp) (E) on the rhizoplane and rhizosphere soil microorganisms was examined at two sites (Lincoln endophytefree (E) and the endophyte strain AR501; and Aorangi E AR501 and a second strain AR542) Rhizosphere and rhizoplane populations of bacteria and fungi functional diversity root fungi and soil microbial biomass carbon and nitrogen were measured Most characteristics measured showed no differences between E and E samples indicating that the presence of endophytes had no impact on nontarget soil microorganisms At Aorangi soil microbial biomass C and N were significantly greater (Plt;005) in AR542 than E1 and AR501 soils Culturable fungal populations from both the rhizoplane and rhizosphere soil were significantly greater (Plt;005) in the E than the AR501 samples at Lincoln but not at Aorangi There were no differences in the functional diversity of rhizoplane microorganisms due to endophyte

Shade performance of a range of turfgrass species improved by trinexapac-ethyl

2004 ◽  
Vol 44 (9) ◽  
pp. 939 ◽  
Author(s):  
R. S. Tegg ◽  
P. A. Lane
Keyword(s):  
Plant Growth ◽  
Perennial Ryegrass ◽  
Tall Fescue ◽  
Festuca Arundinacea ◽  
Poa Pratensis ◽  
Warm Season ◽  
Creeping Bentgrass ◽  
Kentucky Bluegrass ◽  
Ambient Conditions ◽  
The Impact

The increased use of enclosed sports stadiums produces shade conditions that seriously affect the quality of turfgrass surfaces, by encouraging undesirable excess vertical succulent growth. Plant growth regulators offer an opportunity to modify a plant’s growth habit, to enable it to be better adapted to a shady environment. To examine growth response to the plant growth regulator, trinexapac-ethyl, cool-season temperate turfgrasses (Kentucky bluegrass–perennial ryegrass, Poa pratensis L./Lolium perenne L.; creeping bentgrass, Agrostis palustris Huds.; supina bluegrass, Poa supina Schrad.; and tall fescue, Festuca arundinacea Schreb.) and a warm-season species (Bermudagrass, Cynodon dactylon L.) were established in a field experiment. Main treatments were 4 levels of shade (0, 26, 56 or 65% shade), with or without trinexapac-ethyl at a rate of 0.5 kg/ha. A pot experiment measured the vertical shoot growth rates of Kentucky bluegrass–perennial ryegrass and tall fescue under 0, 56 or 65% shade, with and without trinexapac-ethyl. Both experiments were conducted under ambient conditions. Light readings taken in full sunlight, at midday through summer and autumn (major period of assessment), ranged from 1350 to 1950 μmol/m2.s. Trinexapac-ethyl reduced vertical growth of all turfgrass species. This resulted in decreased clipping weights and in clipping material having an increased dry matter percentage (i.e. reduced succulence). The impact of trinexapac-ethyl on sward quality and colour was dependent on shade level, for all species. At 56 and 65% shade, quality and colour improvement was maximised with trinexapac-ethyl application; the magnitude of improvement was dependent on species, with Kentucky bluegrass–perennial ryegrass and bentgrass showing the most benefit. It was concluded that trinexapac-ethyl improved the shade performance of a number of turfgrass species commonly used in high quality turf surfaces. It may offer the potential to reduce costs of managing turf in such an environment.

The effect of endophyte infection on persistence of tall fescue (Festuca arundinacea Schreb.) populations in two climatically contrasting Italian locations

2007 ◽  
Vol 58 (9) ◽  
pp. 893 ◽  
Author(s):  
L. Pecetti ◽  
M. Romani ◽  
A. M. Carroni ◽  
P. Annicchiarico ◽  
E. Piano
Keyword(s):  
Tall Fescue ◽  
Festuca Arundinacea ◽  
Mediterranean Climate ◽  
Physiological Adaptation ◽  
Mediterranean Environment ◽  
Endophyte Infection ◽  
Average Rainfall ◽  
European Race ◽  
The Mediterranean ◽  
Target Environment

Endophytic fungi may reportedly improve summer persistence in tall fescue (Festuca arundinacea Schreb.). The objective of this study was assessing whether endophytes contributed to better persistence in 2 climatically contrasting Italian locations (Sanluri, Mediterranean climate, 382 mm average rainfall; Lodi, subcontinental climate, 802 mm average rainfall). Twelve populations from Sardinia were evaluated for 4 years in each site with or without nitrogen application. The populations hosted either of 2 endophyte forms (long-conidia, Neotyphodium coenophialum; short-conidia, FaTG-2 group) and belonged to the European race of fescue (hosting N. coenophialum) or the Mediterranean race (hosting FaTG-2). Three European-race commercial varieties (hosting N. coenophialum) were included as controls. The evaluated material was present both in the endophyte-infected and the endophyte-free (after chemical treatment) status. Stand persistence was recorded at the end of each year. The effect of the endophyte presence on persistence was nil in the Mediterranean site and slightly positive in the subcontinental location. Populations of the 2 geographic races had contrasting behaviour in the 2 sites irrespective of their endophyte status. The Mediterranean-race populations persisted well in the Mediterranean environment but not in the subcontinental one, and the reverse occurred for the European-race germplasm (including the controls). The results suggest that Mediterranean conditions may be too extreme for any enhancement of persistence to be solely provided by the endophyte, and highlight the overwhelming importance of the physiological adaptation of the grass germplasm to target environment.

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