Creeping Bentgrass (<i>Agrostis stolonifera</i>) Golf Green Tolerance to Bispyribac-Sodium Tank-Mixed with Paclobutrazol

Moss, Justin Q.; Xiong, Xiaozhen; Su, Kemin; Poudel, Bishow; Haguewood, John B.

doi:10.1614/wt-d-10-00148.1

Cited by 2 publications

(3 citation statements)

References 15 publications

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“…Treatment effect on creeping bentgrass turf quality as evaluated by NDVI provides an objective assessment of overall turf performance (Bell et al, 2000; Moss et al, 2012). Similar to results with seedhead suppression, treatments applied singly or sequentially did not interact with other factors.…”

Section: Resultsmentioning

confidence: 99%

“…Phytotoxicity on creeping bentgrass was evaluated weekly on a 1 to 9 scale with 1 = plant death, 9 = no phytotoxicity, and 6 = minimally acceptable injury. Treatment effect on turf quality was measured on the same dates by normalized difference vegetation index (NDVI) using a GreenSeeker handheld sensor (NTech Industries, Ukiah, CA) (Bell et al, 2000; Moss et al, 2012).…”

Section: Methodsmentioning

confidence: 99%

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Suppression of Annual Bluegrass Seedheads with Mefluidide, Ethephon, and Ethephon plus Trinexapac‐Ethyl on Creeping Bentgrass Greens

et al. 2013

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Annual bluegrass (Poa annua L.) is a problematic weed on creeping bentgrass (Agrostis stolonifera L.) putting greens. Annual bluegrass produces extensive seedheads in spring, and plant growth regulators (PGRs) are frequently used to suppress seedhead formation. This study investigated the effects of single and sequential applications of mefluidide, maleic hydrazide, and ethephon alone or in combination with trinexapac‐ethyl (TE), on annual bluegrass seedhead formation. A secondary objective evaluated whether addition of TE enhanced the efficacy of ethephon while improving the safety on creeping bentgrass. Three independent studies were established on golf course greens during a 2‐yr period, with initial PGRs application before annual bluegrass seedhead formation. Regardless of PGR treatment, single or sequential applications in all studies showed no differences in annual bluegrass seedhead suppression. Ethephon‐containing treatments provided the best seedhead suppression with up to 95% reduction. No PGR treatments caused visible phytotoxicity to creeping bentgrass following single applications. Sequential applications of both mefluidide and maleic hydrazide caused significant phytotoxicity to creeping bentgrass for up to 3 wk after initial treatment (WAIT). With the exception of one evaluation date in the third study, tank mixture of TE with ethephon had little effect on annual bluegrass seedhead suppression. Tank‐mixing TE with ethephon marginally enhanced turf quality of creeping bentgrass up to 6% compared to ethephon alone.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Suppression of Annual Bluegrass Seedheads with Mefluidide, Ethephon, and Ethephon plus Trinexapac‐Ethyl on Creeping Bentgrass Greens

et al. 2013

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“…Currently, there is no herbicide labeled for selective postemergence (POST) control of AB on CB putting greens in the United States. Cultural practices or applications of plant growth regulators, such as flurprimidol and paclobutrazol, are inconsistent and often result in unsatisfactory control (Baldwin and Brede, 2011;Murphy, 1995, 1996;Moss et al, 2012;Woosley et al, 2003). Preemergence control with labeled products, such as bensulide (Anonymous, 2003(Anonymous, , 2009) and prepackaged mixture of bensulide plus oxadiazon (Anonymous, 2007), can be ineffective due to the wide germination window of AB and the presence of perennial biotypes [P. annua f. reptans (Hausskn.)…”

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confidence: 99%

Safety of Sequential Fall Methiozolin Applications on Creeping Bentgrass Putting Greens

Xiong

Moss

Haguewood

et al. 2015

Crop Forage & Turfgrass Mgmt

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Methiozolin is an herbicide with preemergence (PRE) and postemergence (POST) activities for control of annual bluegrass (AB; Poa annua L.). Previous research reported that fall applications provide better control than spring applications when methiozolin is applied as a POST, and PRE application appears to show a higher degree of efficacy than POST applications. Preemergence application for AB control on creeping bentgrass (CB; Agrostis stolonifera L.) putting greens requires treatment starting in late summer to early fall, when CB greens are likely under summer stress. Three field studies were conducted to evaluate the safety of fall sequential methiozolin applications on CB greens. Treatments consisted of methiozolin at 0.22, 0.45, 0.67, or 0.89 lb a.i./acre applied 1, 2, or 4 weeks apart, totaling 1.78 to 2.01 lb a.i./acre per season. Phytotoxicity was consistently observed in one out of three studies but was at an acceptable level (≥6 on a scale of 1–9) in all evaluations. Methiozolin applications, regardless of rate or application interval, resulted in a consistent AB control up to 95% over the season, compared with the nontreated control. Results suggest that sequential applications of methiozolin in fall with the initial treatment starting in late summer to early fall may provide effective AB control with acceptable safety to CB putting greens.

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Creeping Bentgrass (Agrostis stolonifera) Golf Green Tolerance to Bispyribac-Sodium Tank-Mixed with Paclobutrazol

Cited by 2 publications

References 15 publications

Suppression of Annual Bluegrass Seedheads with Mefluidide, Ethephon, and Ethephon plus Trinexapac‐Ethyl on Creeping Bentgrass Greens

Suppression of Annual Bluegrass Seedheads with Mefluidide, Ethephon, and Ethephon plus Trinexapac‐Ethyl on Creeping Bentgrass Greens

Safety of Sequential Fall Methiozolin Applications on Creeping Bentgrass Putting Greens

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