Effects of Various Plant Growth Regulators on the Traffic Tolerance of ‘Riviera’ Bermudagrass (Cynodon dactylon L.)

Brosnan, James T.; Thoms, Adam; Breeden, Gregory K.; Sorochan, John C.

doi:10.21273/hortsci.45.6.966

Cited by 17 publications

(17 citation statements)

References 33 publications

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“…Baker et al (1999) reported increased bahiagrass color 12 wk after treatment with imazapic during yr 1 of a 3-yr study in Florida. Trinexapac-ethyl also has been shown to increase concentrations of chlorophyll a and b in 'TifEagle' hybrid bermudagrass (McCullough et al 2004) and the overall color of Riviera bermudagrass (Brosnan et al 2010). In the current study, RCI values for trinexapac-ethyl at 35 DAT in both May and June were 111% of the untreated control as well ( Table 5).…”

Section: Resultsmentioning

confidence: 99%

Common Bermudagrass Seedhead Suppression and Growth Regulation with Fenoxaprop

et al. 2011

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Options for suppressing bermudagrass seedheads in managed turfgrass systems are limited. Experiments were conducted in 2009 and 2010 evaluating the use of fenoxaprop (25, 50, 75, and 100 g ha−1) for ‘Riviera’ bermudagrass seedhead suppression and growth regulation compared to imazapic (52 g ha−1), trinexapac-ethyl (91 g ha−1) and mefluidide (561 g ha−1). In field experiments, seedhead suppression ranged from 77 to 100% for fenoxaprop and imazapic at 35 d after treatment (DAT). Comparatively, seedhead suppression was < 25% for either trinexapac-ethyl or mefluidide at 35 DAT. Seedhead suppression was > 90% from 7 to 35 DAT for fenoxaprop applied at ≥ 50 g ha−1. Injury, determined visually, from fenoxaprop and imazapic in both the field and greenhouse measured < 25% on all rating dates, with no significant injury present after 21 DAT. In greenhouse experiments, fenoxaprop and trinexapac-ethyl showed similar reductions of bermudagrass growth; no differences in aboveground biomass were detected between these treatments at 42 DAT. Results of the current study illustrate that fenoxaprop and imazapic can be applied for bermudagrass seedhead suppression and growth regulation if moderate (< 25%) injury can be tolerated up to 21 DAT. Additional research is needed to evaluate the use of fenoxaprop and imazapic for seedhead suppression on other common and hybrid bermudagrasses.

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Section: Resultsmentioning

confidence: 99%

Common Bermudagrass Seedhead Suppression and Growth Regulation with Fenoxaprop

et al. 2011

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“…A score greater than or equal to 6 was considered acceptable for turfgrass color. Other researchers have used these methods in studies evaluating bermudagrass traffic tolerance (Brosnan et al, 2010)…”

Section: Methodsmentioning

confidence: 99%

Perennial Ryegrass (Lolium perenne L.) and Grooming Affect Bermudagrass Traffic Tolerance

et al. 2011

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Data describing intraspecific differences in hybrid bermudagrass [Cynodon dactylon (L.) Pers. X C. transvaalensis Burtt Davy] traffic tolerance are linriited. Field research was conducted evaluating the effects of nnowing practices and perennial ryegrass {Lolium perenne L.) overseeding on the traffic tolerance of three hybrid and one improved common bermudagrass. Bermudagrass cultivars (Tifway', 'Patriot', 'Mississippi Choice', and 'Riviera') were subjected to mowing programs (reel mowing at 2.2 cm [RM] or RM plus grooming to a 1.9 cm depth [RMPG]) and perennial ryegrass overseeding (0 kg pure live seed [PLS] ha-1 or 593 kg PLS ha"^). Simulated traffic was applied twice weekly with a Cady traffic simulator. Percent green cover was measured after each simulated traffic event using digital image analysis. On >70% of evaluation dates, Tifway and Riviera yielded higher percent green cover compared to Patriot, while Mississippi Choice ranked intermediate. Reel mowing at 2.2 cm plus grooming to a 1.9 cm depth reduced percent green cover on the majority of rating dates in 2006; however, this response was not observed in 2007. Reel mowing at 2.2 cm plus grooming to a 1.9 cm depth did not reduce thatch accumulation either year. Reductions in bulk density and increases in green cover, thatch accumulation, and saturated hydraulic conductivity were associated with overseeding, suggesting that this practice may protect bermudagrass athletic fields from both components of traffic stress; wear and sou compaction.

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“…Treatments received ~12 mm of irrigation after application each year with all plots irrigated to sustain active growth thereafter. Similar to Brosnan et al (1), plots were subjected to 15 simulated traffic events (i.e., 3 events per week) with a CADY traffic simulator. Traffic was initiated 2 and 7 weeks after herbicide application in 2009 and 2010, respectively.…”

Section: Smooth Crabgrass Control With Pre Herbicides Subjected To 15mentioning

confidence: 99%

“…Plots were subjected to 15 simulated traffic events (3 events per week) using the CADY traffic simulator beginning on 4 May 2011. Traffic tolerance and recovery were quantified by measuring turfgrass coverage using digital image analysis similar to Brosnan et al (1). Experimental design was a randomized complete block with six replications.…”

Section: Smooth Crabgrass Control With Pre Herbicides Subjected To 15mentioning

confidence: 99%