Abstract Turfgrass breeders regularly release new cultivars with documented improvements in aesthetics, playability, and stress tolerance for golf turf fairway use. However, complete renovation of the existing results significant losses recreational play potential revenue. Field experiments were conducted on mixed cool‐season species to evaluate grass conversion programs using either no chemical suppression or reduced‐impact compared renovation. Chemical‐treated main plots vertically mowed...

Abstract Late‐season application of N to bermudagrass ( Cynodon dactylon × transvaalensis Burtt‐Davey) putting greens are often made in an attempt extend turfgrass growth and color. Research was conducted evaluate the physiological morphological responses late‐season K. Application 0, 4.9, 9.8 g m −2 factorial combination with 4.1, 8.2 K were October 1989, 1990, 1991. Following fertilizer application, measurements fall spring color, total nonstructural carbohydrate (TNC) concentrations, leaf...

Creeping bentgrass ( Agrostis stolonifera ) is used extensively on temperate zone golf course greens, tees, and fairways, but often performs poorly in shade. Previous research has indicated that sequential applications of gibberellic acid (GA) inhibiting plant growth regulators (PGRs) such as trinexapac-ethyl (TE) increase cool-season turfgrass performance 70-90% This was conducted to: 1) confirm appropriate TE application rates frequencies for maintaining `Penncross' creeping dense shade...

Spring dead spot (SDS) (

This study was conducted to determine the potential anti-senescence activity of certain chemicals by monitoring changes in gross. CO 2 exchange with senescence excised leaves Kentucky bluegrass (Poa pratensis L.). One day following foliar applications benzyladenine (BA), triadimefon, and propiconazole, without chelated Fe (8% phosphate citrate), were excised, floated on distilled water petri dishes, placed a darkened growth chamber. Gross rates (CER) recorded 1, 4, 7, 10 days after excision...

Urban land disturbance degrades physical, chemical, and biological soil properties by removing topsoil compacting the remaining subsoil. Such practices create a environment that is unfavorable for vegetation establishment. A 3-year field study was conducted to compare effects of various one-time compost application treatments on re-vegetation disturbed soil. urban received following treatments: (1) inorganic fertilizer; (2) 2.5-cm-depth surface-applied compost; (3) incorporated (4)...

Abstract Enhanced growth of seedling turfgrasses with biostimulator materials or chelated Fe could accelerate the rate establishment. Field experiments in spring and fall 1987 greenhouse winter 1988 were designed to measure Kentucky bluegrass ( Poa pratensis L.) responses foliar applications benzyladenine (BA, 6‐benzylaminopurine), propiconazole [1‐{[2‐(2,4‐dichlorophenyl)‐4‐propyl‐1,3‐dioxolan‐2‐ yl ]methyl}‐l‐(1 H ‐1,2,4‐triazole], triadimefon [l‐(4‐chlorophenoxy)‐3,3‐dimethyl‐l‐(1...

Bermudagrass turfs in the southern United States often receive late growing season applications of nitrogen (N) order to sustain turfgrass color prior dormancy, even though such might increase winterkill potential. Yearly research trials were initiated last week Sept. 1989 1991 at Mississippi State Univ. evaluate fall and spring responses rhizome levels total nonstructural carbohydrates (TNC) `Tiflawn' Arizona (AZ) Common bermudagrass [ Cynodon dactylon L. (Pers.)] treated with various N...

This study was conducted to determine if foliar-applied biostimulators could enhance harvestability and transplanting of Kentucky bluegrass (Poa pratensis L.) sod. The systemic triazole fungicides propiconazole at 42 mg·m -2 triadimefon 150 mg·m- 2 enhanced post-transplant rooting sod strength bluegrass. Propiconazole had the best enhancement effect, increasing tensile 23% transplant root lift 64% across three experiments. synthetic cytokinin benzyladenine (BA) 6 seaweed extract (SWE, a...

Research was conducted over 2 years to evaluate efficacy of various levels and combinations imazaquin AC 263,222 for growth regulation unimproved bahiagrass (`Pensacola') turf. Imazaquin at 0.42 kg·ha –1 caused only slight discoloration in all trials reduced seedhead count (as compared the nontreated control) by ≥80% 8 weeks after treatment (WAT) following a July 1992 application. 0.042 or 0.056 applied late May June provided 100% control through WAT. However, Aug. 1993 resulted unacceptable...

The ability of a temporary turf cover and foliar-applied iron (Fe) to sustain or promote bermudagrass ( Cynodon dactylon (L.) × transvaalensis Burtt-Davy `Tifway' growth beyond its normal growing periods in central Mississippi was evaluated during the fall, winter, spring seasons 1998-2001. application polypropylene blanket when night temperatures were predicted be ≤4 °C extended acceptable quality by 5 8 weeks fall winter period as compared uncovered control plots. Also, complete green-up...

Ultradwarf bermudagrass (UDB) putting greens grown in subtropical and temperate climates can face elevated risk of winter injury from cold temperatures. Trinexapac-ethyl (TE) inhibits UDB growth potentially reducing spring green-up overexertion carbohydrate reserves for during the de-acclimation period. A field study was conducted to determine effect fall TE applications on visual quality color Virginia acclimation phase through phase. second controlled-environment how affected tolerance. In...

Off‐type bermudagrasses ( Cynodon spp.) continue to be a major concern on southern U.S. golf greens because of the disruption surface uniformity and playability. The current study was undertaken measure genetic stability six bermudagrass cultivars (Champion, Floradwarf, MS‐Supreme, Tifdwarf, TifEagle, Tifgreen) in response two dinitroaniline herbicides pendimethalin { N ‐(1‐ethylpropyl)‐3,4‐dimethyl‐2, 6‐dinitrobenzenamine} oryzalin (3,5‐dinitro‐ 4 ‐dipropylsuffanilamide), which are commonly...

St. Augustinegrass [Stenotaphrum secundatum (Walt.) Kuntze] a popular southern turfgrass with poor cold tolerance. The objective of this study was to evaluate the inheritance tolerance in Augustinegrass. Eight diploid genotypes were chosen as parents for complete diallel mating reciprocals. Three replications each single cross and planted field trial at Mississippi State, MS, winter survival evaluated from 1994 1996. Differential thermal analysis used predict lethal low temperatures...

Inadequate nutrients and poor soil quality pose challenges for turfgrass establishment on disturbed soils. Compost amendment has been shown to mitigate quality. This research was conducted compare surface applications of compost standard hydroseeding improving chemical properties establishment. Plots established with either hydroseed or in spring 2007 were evaluated pH, Mehlich-I extractable K, Mg, Zn, P, total N, organic C, percent ground cover, fescue coverage biomass production tall...

Research trials were conducted on a bermudagrass (Cynodon magennissii Hurc. 'MS-Express') putting green at the Mississippi State University Golf Course over winter months of 2000-2001, 2001-2002, and 2002-2003 to evaluate how various turf covers modify surface temperatures turfgrass growth when applied for temporary cold temperature protection. Average daily maximum, minimum, mean recorded, as well average range in under covers. Temperature responses varied with cover composition,...

Greenhouse pot trials were conducted to compare the effects of compost sources and planting treatments on turfgrass germination emergence. Eight seeding 4 types factorially combined replicated four times in a completely randomized block design. The were: 1) seed planted surface 2.6 cm overlying soil, 2) soil below 0.65 compost, 3) 1.3 4) 5) covered with straw mat, 6) 7) 1:1 compost:soil mix, 8) surface. Tall fescue (Festuca arundinacea Schreb.), Kentucky bluegrass (Poa pratensis L.),...

A bioorganic fiber seeding mat was compared to traditional into a prepared soil ascertain any advantages or disadvantages in turfgrass establishment between the planting methods. Bahiagrass ( Paspalum notatum ), bermudagrass Cynodon dactylon carpetgrass Axonopus affinis centipedegrass Eremochloa ophiuroides st. augustinegrass Stenotaphrum secundatum and zoysiagrass Zoysia japonica ) were seeded at recommended levels May 1995 July 1996. The methods evaluated under both irrigated nonirrigated...

Abstract Some fineleaf fescues have demonstrated tolerance to glyphosate, and this broad-spectrum, nonselective herbicide would be a valuable tool for controlling various weeds in low-input turf areas. A study was conducted evaluate of 56 fescue varieties glyphosate applied at 0.0, 0.4, 0.6, 1.0 kg ae ha −1 . The defunct 2003 National Turfgrass Evaluation Program variety trial the Research Center Blacksburg, VA, provided main plots on which treatments were randomized independently May 16,...

Brown patch, caused by Rhizoctonia solani, is a destructive disease on tall fescue. Compared with R. zeae causes indistinguishable symptoms in the field but varies geographic distribution. This may contribute to variability observed resistance response of improved brown patch-resistant cultivars. study examined solani and susceptibility four cultivars, selected based patch performance National Turfgrass Evaluation Program (NTEP), nine plant introductions (PIs). Twenty genotypes per...

Bahiagrass ( Paspalum notatum Fluegge) is a widely used grass for low maintenance turf areas such as highway rights‐of‐ways in the southeastern USA. Although well adapted to poor soils, fertility, and rainfall conditions, bahiagrass requires frequent mowing maintain uniformity because of rapid prolific seedhead production. This study was conducted June August both 1995 1996 determine effects various timings either before or after application plant growth regulator AC 263,222 [(AC) (±)‐2‐...

Laboratory studies were conducted to determine the basis for chlorsulfuron selectivity between Kentucky bluegrass (Poa pratensis L. cv . Kenblue) and tall fescue (Festuca arundinacea Schreb. Rebel). Tall absorbed translocated more foliar-applied [ 14 C]-labeled from treated leaf than bluegrass. The two species similar amounts of nutrient solution into roots, but radioactivity shoots. metabolized in shoots slightly slowly Allof these factors apparently contributed higher tolerance...

The objective of this study was to relate the lethal freezing temperatures St. Augustinegrass [ Stenotaphrum secundatum (Walt.) Kuntze] genotypes, as measured by differential thermal analysis (DTA), winter survival observed in field. DTA-predicted 14 genotypes ranged from –7.7 –4.7C. Regression field vs. resulted an r 2 = 0.57 for one trial that evaluated cultivars with a relatively narrow range expected tolerance. In second evaluating greater tolerance, 0.92 when regressed on temperatures....

Research was conducted in 1990 through 1992 to examine the vegetative and reproductive growth regulating activity of imazaquin AC 263,222 on common bermudagrass. at 0.06 kg ha −1 , alone combination with (0.21 ai ), significantly reduced seedhead number, height, canopy height for a 4-wk period after both May July treatment. Imazaquin (0.42 ) applied resulted less turfgrass discoloration, but suppressed bermudagrass as compared treatments containing 263,222.

Spring dead spot (SDS), caused by Ophiosphaerella spp., is among the most damaging diseases to hybrid bermudagrass ( Cynodon dactylon × transvaalensis ) in areas where winter dormancy occurs. Management strategies that aid turfgrass recovery from SDS damage have not been widely studied. An experiment was conducted Blacksburg, VA, 2019 and 2020, determine influence of various cultural practices on damage. Fertility cultivation were applied late spring/early summer, which earlier than normal...