Herbicide Tolerance on ‘Sea Spray’ Seashore Paspalum Seedlings

Patton, Aaron J.; Trappe, Jon M.; Richardson, Michael D.; Nelson, E. K.

doi:10.1094/ats-2009-0720-01-rs

Cited by 12 publications

(16 citation statements)

References 12 publications

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“…McCullough et al (2012b) found applications of sulfentrazone at 0.42 kg ai ha À1 caused , 20% injury to actively growing Sea Isle I seashore paspalum at 1 and 3 WAT. In other experiments, carfentrazone treatments caused , 15% injury to seashore paspalum seedlings (Patton et al 2009). Applications of flumioxazin may cause unacceptable injury to actively growing seashore paspalum, but treatments may be safely applied at , 10% green cover.…”

Section: Resultsmentioning

confidence: 85%

Tolerance of Five Warm-Season Turfgrass Species to Flumioxazin

Reed¹,

McCullough²

2014

Weed technol.

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Flumioxazin provides PRE and POST, annual weed control in dormant bermudagrass, but applications during active growth may be injurious. Flumioxazin could also provide an alternative chemistry for POST annual bluegrass control in other turfgrasses, but research is limited on tolerance levels. The objective of this research was to evaluate tolerance of five warm-season turfgrasses to flumioxazin applied at various rates and timings. Late-winter applications of flumioxazin at 0.21, 0.42, or 0.84 kg ai ha−1caused acceptable (< 20%) injury to bermudagrass, seashore paspalum, St. Augustinegrass, and zoysiagrass at 3, 6, and 9 wk after treatment (WAT) in both years. In 2012, late-winter applications to centipedegrass caused unacceptable injury at 6 WAT, but turf recovered to acceptable levels by 9 WAT at all rates. Applications made during active turfgrass growth caused unacceptable initial injury to all species. However, bermudagrass, seashore paspalum, St. Augustinegrass, and zoysiagrass recovered to < 20% injury by 9 WAT from all rates. In 2012, centipedegrass treated in midspring had 0, 24, and 74% injury from flumioxazin at 0.21, 0.42, and 0.84 kg ha−1, respectively, at 9 WAT. In 2013, midspring applications to centipedegrass caused 13, 48, and 71% injury from 0.21, 0.42, and 0.84 kg ha−1, respectively at 9 WAT. Overall, flumioxazin has the potential to control annual weeds in bermudagrass, seashore paspalum, St. Augustinegrass, and zoysiagrass with late-winter applications before greenup, but all turfgrasses may be excessively injured during active growth.

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Section: Resultsmentioning

confidence: 85%

Tolerance of Five Warm-Season Turfgrass Species to Flumioxazin

Reed¹,

McCullough²

2014

Weed technol.

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“…For example, foramsulfuron, rimsulfuron, and trifloxysulfuron are effective POST herbicides for annual bluegrass control in bermudagrass ( Cynodon dactylon L.) and zoysiagrass ( Zoysia spp. ), but may cause excessive injury (>20%) to seashore paspalum (12, 21, 22, 25). Ethofumesate has potential for use in seashore paspalum, but applications are often injurious and are limited to early POST timings for annual bluegrass control (4, 11, 12, 25).…”

Section: Introductionmentioning

confidence: 99%

“…Preemergence (PRE) herbicides, including dinitroanilines and oxadiazon, may be applied in fall for annual bluegrass control in seashore paspalum (21). However, POST annual bluegrass control is difficult due to a lack of selective graminicides safe on seashore paspalum.…”

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confidence: 99%

Flazasulfuron Tank Mixtures with Amicarbazone for Annual Bluegrass Control in Seashore Paspalum

Johnston

McCullough

2014

Applied Turfgrass Science

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Flazasulfuron may be safely applied to actively growing seashore paspalum (Paspalum vaginatum Sw.), but applications for annual bluegrass control in late winter or spring could be injurious. A 3‐year field experiment was conducted to evaluate tank mixtures of flazasulfuron with amicarbazone at turf dormancy or partial greenup to determine if combinations could enhance annual bluegrass control and mitigate seashore paspalum injury compared to exclusive treatments. Single applications of flazasulfuron at 26 g a.i. ha−1 at both timings provided good (80 to 89%) to excellent (>90%) control of annual bluegrass in 2 of 3 years, while sequential applications provided ≥86% control at both timings in all 3 years. Tank mixtures of flazasulfuron at 26 g ha−1 plus amicarbazone at 196 g ha−1 significantly improved annual bluegrass control from flazasulfuron alone at 26 g ha−1 at both timings in 2 of 3 years. Amicarbazone tank mixtures did not improve annual bluegrass control from flazasulfuron at 52 g ha−1 alone at either timing. Late winter applications of amicarbazone at 196 g ha−1 alone provided poor annual bluegrass control (<70%) in 2 of 3 years while applications at turf greenup provided ≥88% control in all 3 years. Pronamide provided fair control (70 to 78%) and excellent control (≥90%) of annual bluegrass in 2 of 3 years when applied at dormancy or at greenup, respectively. All flazasulfuron treatments caused 36 to 54% injury when applied at greenup but single applications at dormancy caused 13 to 29% injury. Amicarbazone and pronamide alone never injured seashore paspalum greater than 17% at both application timings and treatments at greenup provided the best combinations of annual bluegrass control and turf tolerance.

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“…Sulfonylureas such as foramsulfuron, rimsulfuron, and trifloxysulfuron are effective POST herbicides for annual bluegrass control in warm-season grasses but may cause excessive injury (. 20%) to seashore paspalum (Johnson and Duncan 2000;Patton et al 2009;Toler et al 2007;Unruh et al 2006). Ethofumesate has potential for use in seashore paspalum but applications are limited to early POST timings for annual bluegrass control as efficacy is often reduced on mature plants in spring (Coats and Krans 1986;Johnson 1983).…”

mentioning

confidence: 99%

Seashore Paspalum (Paspalum vaginatum) Tolerance to Pronamide Applications for Annual Bluegrass Control

McCullough

Barreda

2012

Weed technol.

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Annual bluegrass is a troublesome weed in turf management and there are currently limited POST herbicides labeled for use in seashore paspalum. Field and greenhouse experiments were conducted to evaluate seashore paspalum tolerance to pronamide and other herbicides for annual bluegrass control. In field experiments, turf injury never exceeded 7% from pronamide applied at dormancy, 50% green-up, or complete green-up of seashore paspalum in spring. Annual bluegrass control from pronamide was initially similar across timings and averaged 67, 90, and 98% control from 0.84, 1.68, and 3.36 kg ai ha−1, respectively, after 6 wk. In greenhouse experiments, the aforementioned pronamide rates caused less than 10% injury on seashore paspalum. Seashore paspalum injury in the greenhouse was excessive (> 20%) from atrazine, bispyribac-sodium, and trifloxysulfuron and moderate (7 to 20%) from foramsulfuron, rimsulfuron, and ethofumesate. Seashore paspalum seedhead count reductions by 4 wk after treatment (WAT) were good to excellent (87 to 98%) from atrazine, bispyribac-sodium, rimsulfuron, and trifloxysulfuron and poor (≤ 0%) from ethofumesate, foramsulfuron, and pronamide. By 4 WAT, seashore paspalum clippings were reduced 0 to 39% from pronamide, whereas atrazine, bispyribac-sodium, and trifloxysulfuron reduced clippings by 54 to 69% from the untreated and ethofumesate, foramsulfuron, and rimsulfuron reduced clippings by 27 to 39%.

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Herbicide Tolerance on ‘Sea Spray’ Seashore Paspalum Seedlings

Cited by 12 publications

References 12 publications

Tolerance of Five Warm-Season Turfgrass Species to Flumioxazin

Tolerance of Five Warm-Season Turfgrass Species to Flumioxazin

Flazasulfuron Tank Mixtures with Amicarbazone for Annual Bluegrass Control in Seashore Paspalum

Seashore Paspalum (Paspalum vaginatum) Tolerance to Pronamide Applications for Annual Bluegrass Control

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