Abstract
Summer decline in turf quality and growth of cool-season grass species is a major concern in turfgrass management. The objectives of this study were to investigate whether foliar application of trinexapac-ethyl (TE) and two biostimulants (TurfVigor and CPR) containing seaweed extracts would alleviate the decline in creeping bentgrass ( Agrostis stolonifera L.) growth during summer months and to examine effects of TE and the biostimulants on leaf senescence and root growth. The study was performed on a ‘Penncross’ putting green built on a sandy loam soil at Hort Farm II, North Brunswick, NJ, in 2007 and 2008. Turf was foliar-sprayed with water (control), TE (0.05 kg a.i./ha), TurfVigor (47.75 L·ha −1 ), or CPR (19.10 L·ha −1 ) from late June to early September in a 2-week interval in both years. Turf quality, density, chlorophyll content, canopy photosynthetic rate (P n ), and root growth exhibited significant decline during July and August in both 2007 and 2008, to a greater extent in each parameter for the control treatment. Foliar application of TE resulted in significant improvement in turf quality, density, chlorophyll content, and P n on certain sampling dates from July to September in both years compared with the control. Both TurfVigor and CPR significantly improved visual quality during July and August in both years by promoting both shoot and root growth. This study suggests that proper application of TE and selected biostimulants could be effective to improve summer performance of creeping bentgrass.
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Claims 6
Claim · model-written summary
Turf quality, density, chlorophyll content, canopy photosynthetic rate, and root growth declined during July and August in both years, more in control turf.
- Taxon
- Creeping Bentgrass
Agrostis stoloniferat0 - Outcome
- Turf quality, density, chlorophyll content, canopy photosynthetic rate (P n ), and root growthe0
- Direction
- declinee0
- Qualifier
- during July and August in both 2007 and 2008e0
- Comparator
- control treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Turf quality, density, chlorophyll content, canopy photosynthetic rate (P n ), and root growth exhibited significant decline during July and August in both 2007 and 2008, to a greater extent in each parameter for the control treatment”
t0“Creeping Bentgrass”
Claim · model-written summary
TE improved turf quality and density on some July to September dates relative to water control.
- Taxon
- Creeping BentgrassAgrostis stoloniferat0
- Treatment
- Foliar application of TEe0
- Outcome
- turf quality, densitye0
- Direction
- improvemente0
- Qualifier
- on certain sampling dates from July to September in both yearse0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar application of TE resulted in significant improvement in turf quality, density, chlorophyll content, and P n on certain sampling dates from July to September in both years compared with the control”
t0“Creeping Bentgrass”
Claim · model-written summary
TE improved chlorophyll content and canopy photosynthetic rate on some July to September dates relative to control.
- Taxon
- Creeping BentgrassAgrostis stoloniferat0
- Treatment
- Foliar application of TEe0
- Outcome
- chlorophyll content, and P ne0
- Direction
- improvemente0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar application of TE resulted in significant improvement in turf quality, density, chlorophyll content, and P n on certain sampling dates from July to September in both years compared with the control”
t0“Creeping Bentgrass”
Claim · model-written summary
TurfVigor improved visual quality in July and August of both years by promoting shoot and root growth.
- Taxon
- Creeping BentgrassAgrostis stoloniferat0
- Treatment
- TurfVigore0
- Outcome
- visual qualitye0
- Direction
- improvede0
- Qualifier
- during July and August in both years by promoting both shoot and root growthe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both TurfVigor and CPR significantly improved visual quality during July and August in both years by promoting both shoot and root growth”
t0“Creeping Bentgrass”
Claim · model-written summary
CPR improved visual quality in July and August of both years by promoting shoot and root growth.
- Taxon
- Creeping BentgrassAgrostis stoloniferat0
- Treatment
- CPRe0
- Outcome
- visual qualitye0
- Direction
- improvede0
- Qualifier
- during July and August in both years by promoting both shoot and root growthe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both TurfVigor and CPR significantly improved visual quality during July and August in both years by promoting both shoot and root growth”
t0“Creeping Bentgrass”
Claim · model-written summary
The authors suggest applying TE and selected biostimulants to improve creeping bentgrass summer performance.
- Taxon
- creeping bentgrassAgrostis stoloniferae0
- Outcome
- proper application of TE and selected biostimulantse0
- Qualifier
- could be effective to improve summer performancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“proper application of TE and selected biostimulants could be effective to improve summer performance of creeping bentgrass”
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See all 5 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.