Abstract Mowing is a cultural practice needed to maintain an attractive lawn but requires labor and increases net carbon emissions. Reducing mowing decreases emissions may decrease the visual quality of lawns. Tall fescue ( Festuca arundinacea Schreb.; syn. Schedonorus arundinaceus (Schreb.) Dumort., nom. cons.; Lolium arundinaceau Darbysh) buffalograss Bouteloua dactyloides (Nutt.) Columbus) lawns are recommended remove only 33% leaf tissue at every event, whereas this has not been compared...

Evaluation of turfgrass performance at low nitrogen fertility levels is important because many home lawns are fertilized below common recommendations. The objective this study was to evaluate visible quality and weed susceptibility alternative cool season grasses under multiple management regimes in Wisconsin. A split-split plot completely randomized block design used ‘Kingfisher' Kentucky bluegrass (Kentucky bluegrass), ‘Kenblue' bluegrass, ‘Victory II' chewings fescue, ‘Grande tall ‘Jiffe...

Trinexapac‐ethyl (TE) is a widely used growth regulator in the turfgrass industry. Poor summer efficacy has been related to more rapid metabolism plant. The purpose of this study was determine if growing degree day (GDD) model could be identify optimum TE reapplication interval for putting greens. This objective accomplished through development and validation. Model conducted on creeping bentgrass ( Agrostis stolonifera L.) golf green Madison, WI, during 2008. treatments consisted five...

Nutrient uptake is strongly influenced by plant growth rate. Accelerated leads to nutrient levels incapable of sustaining the optimal rate, resulting in shoot root signaling for increased absorption. The factors controlling demand turfgrass and its consequences have not been investigated. objectives this research were verify that exhibits principal characteristics demand-driven identify primary factor via regulation rates. Kentucky bluegrass clipping production linearly up annual fertilizer...

ABSTRACT Accurate determination of turfgrass yield via clipping harvest can be problematic on closely mowed research putting greens because sand often contaminates samples. Scientists reporting green yields rarely mention if or how was removed from clippings. The two objectives were: (i) evaluate the efficacy three cleaning methods (water decantation, forced air, and a vibrating pan method) (ii) effect contamination field data variability. All effectively coarse sample while only method fine...

Petroleum-derived spray oils (PDSOs) have been used for pest management in horticulture and agronomy over a century. Civitas™ is new PDSO designed use the turfgrass industry. It commonly mixed with low rates of pesticides to reduce environmental impact improve plant stress tolerance. Civitas can cause phytotoxicity, which has limited its acceptance by green pigment called Harmonizer™ sustain acceptable color. A field study growth chamber were quantify understand role Harmonizer, isolate...

Plant growth regulators (PGRs) are commonly applied to ultradwarf hybrid bermudagrass [ Cynodon dactylon (L.) Pers. × C. transvaalensis Burtt‐Davy] putting greens during the growing season. Trinexapac‐ethyl (TE) and prohexadione‐Ca (PH) PGRs that inhibit gibberellic acid biosynthesis used reduce clipping yield improve turfgrass visual quality. Growing degree day (GDD) models have optimized timing of PGR reapplications creeping bentgrass ( Agrostis stolonifera L.) greens, but no information...

ABSTRACT The plant growth regulator trinexapac‐ethyl (TE) [4‐(cyclopropyl‐a‐hydroxymethylene)‐3,5‐dioxo‐cyclohexanecarboxylic acid ethylester] reduces turfgrass clipping yield and enhances color density. Typically, such responses are achieved through alteration of N application rate, yet few have comprehensively investigated the effect TE on requirements. We hypothesized that putting green requirements without sacrificing quality. A three year study was conducted a creeping bentgrass (...

Core Ideas Non‐chelated Fe sources resulted in little to no increase soluble at 1 h and 21 d. Synthetic chelates increased solubility soil but results varied according pH. The of soil‐applied products should be considered prior use. ABSTRACT Iron is a common component granular fertilizers. Chelating agents are commonly used plant uptake. Numerous marketed as few have been confirmed soils. objective this study was determine the from 10 fertilizers applied 11 North American Brookston, Cecil,...

Abstract Annual bluegrass (ABG) ( Poa annua L.) is a prolific seed producer in the spring on golf courses that turn decreases aesthetic quality and trueness of ball roll cool‐season putting greens. Proxy (ethephon) applied twice after green‐up current industry standard loss Embark (mefluidide) from turf ornamental market. However, plant growth regulators including have been used for years to help suppress ABG seedheads with inconsistent success. The primary objective this study was determine...

The Mehlich-3 soil test is extensively used to determine available P; however, calibration studies for sand greens are lacking. purpose of this field study was evaluate turfgrass response different P (STP) levels and application trinexapac-ethyl (TE) (0.1 kg a.i. ha−1 every 200 growing degree days). A creeping bentgrass (Agrostis stolonifera L. 'Penn A4') putting green constructed at the O.J. Noer Turfgrass Research Education Facility in Madison, WI, using 30 cm calcareous overlaying pea...

Reflectance‐based vegetation indices are commonly used to quantify turfgrass color, estimate chlorophyll content, and make inferences about plant health. These methods often substituted for visual color ratings, as they well correlated but more objective. This study examines the utility of reflectance‐based evaluating treated with iron or colorants. In a in Madison, WI, creeping bentgrass ( Agrostis stolonifera L.) was ammonium sulfate (2.4 9.8 kg nitrogen [N] ha −1 ), Turf Screen (untreated...

Core Ideas Growing degree day models continue to predict plant growth regulator performance in turfgrass. Data collection should occur until the response has dissipated, not based on predefined intervals. Including a dampening coefficient sinewave allows clipping yield effect decay with time. Adding fit datasets where rebound phase did occur. (GDD) can of regulators (PGRs) applied creeping bentgrass ( Agrostis stolonifera L.). The goal this letter is describe experimental design strategies...

The performance of plant growth regulators (PGRs) in turfgrass is closely related to air temperature. Growing degree‐days (GDD) have been used predict the a foliar‐absorbed PGR, trinexapac‐ethyl (TE), on creeping bentgrass ( Agrostis stolonifera L.). Similar models not attempted for paclobutrazol, root‐absorbed PGR. This research aimed develop GDD (base temperature = 0°C) paclobutrazol applied alone or combination with TE. Models were developed putting greens Madison, WI (2009) and near...

Abstract Research was conducted to determine if turfgrass quality and playability perceptions of golf course fairway plots buffalograss ( Bouteloua dactyloides [Nutt.] Columbus), creeping bentgrass Agrostis stolonifera L.), Kentucky bluegrass Poa pratensis L.) managed at a 1.27‐cm mowing height changed after participants were informed management costs. A field study designed with species as main plots, split different irrigation, fertility, pest control inputs that influenced Study indicated...

Abstract Winter desiccation injury can severely impact golf courses in the northern and central Great Plains. While it is well‐established that turfgrass crown moisture content (CMC) declines during fall cold‐acclimation, little known about CMC winter stress how management practices influence stress. The objectives of this study were to understand protective covers, sand topdressing, spray‐applied treatments creeping bentgrass ( Agrostis stolonifera ) spring green‐up following Nebraska....

Buffalograss is a warm-season, dioecious grass species yielding burs, which are routinely used for field plantings. The pistillate plants bear the burs containing 1–5 caryopses. Isolated caryopses readily germinate, but contained within exhibit strong dormancy, suggesting that inhibit germination. Priming with low concentrations of potassium nitrate (KNO 3 ) as an industry standard to improve Seed dormancy and germination in many strongly influenced by endogenous hormone levels, principally...