Abstract
Annual bluegrass ( Poa annua L.) continues to be a problem in bermudagrass golf greens overseeded with roughstalk bluegrass ( Poa trivialis L. `Sabre) due to weed encroachment from adjacent fairways, lack of selective herbicide options, and weed diversity. A 2-year study was conducted on an overseeded `Tifgreen bermudagrass putting green to evaluate effects of herbicide treatments on overseeding and annual bluegrass control. Excellent annual bluegrass control (≥90%) and acceptable turfgrass cover (§70%) was achieved with oxadiazon at 2.2 kg·ha -1 a.i. applied 60 days before overseeding (DBO). Fenarimol (AS) at 4.1 kg·ha -1 a.i. (30 + 15 DBO) followed by 1.4 kg·ha -1 a.i. 60 days after overseeding (DAO) and dithiopyr at 0.6 kg·ha -1 a.i. (60 DBO + 120 DAO) also provided acceptable results. Dithiopyr at 0.4 kg·ha -1 a.i. (30 DBO + 120 DAO), dithiopyr at 0.3 kg·ha -1 a.i. (30 DBO + 30 + 120 DAO), and fenarimol (G) at 2.0 kg·ha -1 a.i. (45 + 30 DBO) followed by 0.8 kg·ha -1 a.i. 60 DAO provided inconsistent annual bluegrass control (55% to 75% in 1999 and 87% to 95% in 2000), but offered acceptable turfgrass cover (§70%) each year. The remaining treatments were generally ineffective and provided <50% annual bluegrass control one or both years. Oxadiazon applied 60 DBO at 2.2 kg·ha -1 a.i. provides an excellent option for annual bluegrass control in overseeded bermudagrass putting greens.
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Claims 8
Claim · model-written summary
Oxadiazon at 2.2 kg·ha -1 a.i. 60 days before overseeding achieved at least 90% annual bluegrass control and at least 70% turf cover.
- Taxon
- Bermudagrass
Cynodon dactylont0 - Treatment
- oxadiazon at 2.2 kg·ha -1 a.i. applied 60 days before overseeding (DBO)e0
- Interactor
- annual bluegrasse0weed
- Outcome
- annual bluegrass controle0
- Direction
- Excellente0
- Value
- ≥90%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Excellent annual bluegrass control (≥90%) and acceptable turfgrass cover (§70%) was achieved with oxadiazon at 2.2 kg·ha -1 a.i. applied 60 days before overseeding (DBO).”
t0“Bermudagrass”
Claim · model-written summary
Fenarimol AS program gave acceptable results.
- Taxon
- BermudagrassCynodon dactylont0
- Treatment
- Fenarimol (AS) at 4.1 kg·ha -1 a.i. (30 + 15 DBO) followed by 1.4 kg·ha -1 a.i. 60 days after overseeding (DAO)e0
- Outcome
- acceptable resultse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fenarimol (AS) at 4.1 kg·ha -1 a.i. (30 + 15 DBO) followed by 1.4 kg·ha -1 a.i. 60 days after overseeding (DAO) and dithiopyr at 0.6 kg·ha -1 a.i. (60 DBO + 120 DAO) also provided acceptable results.”
t0“Bermudagrass”
Claim · model-written summary
Dithiopyr at 0.6 kg·ha -1 a.i. also gave acceptable results.
- Taxon
- BermudagrassCynodon dactylont0
- Treatment
- dithiopyr at 0.6 kg·ha -1 a.i. (60 DBO + 120 DAO)e0
- Outcome
- acceptable resultse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“dithiopyr at 0.6 kg·ha -1 a.i. (60 DBO + 120 DAO) also provided acceptable results.”
t0“Bermudagrass”
Claim · model-written summary
Dithiopyr at 0.4 kg·ha -1 a.i. provided inconsistent control but acceptable cover.
- Taxon
- BermudagrassCynodon dactylont0
- Treatment
- Dithiopyr at 0.4 kg·ha -1 a.i. (30 DBO + 120 DAO)e0
- Interactor
- annual bluegrasse0weed
- Outcome
- inconsistent annual bluegrass controle0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dithiopyr at 0.4 kg·ha -1 a.i. (30 DBO + 120 DAO), dithiopyr at 0.3 kg·ha -1 a.i. (30 DBO + 30 + 120 DAO), and fenarimol (G) at 2.0 kg·ha -1 a.i. (45 + 30 DBO) followed by 0.8 kg·ha -1 a.i. 60 DAO provided inconsistent annual bluegrass control (55% to 75% in 1999 and 87% to 95% in 2000), but offered acceptable turfgrass cover (§70%) each year.”
t0“Bermudagrass”
Claim · model-written summary
Dithiopyr at 0.3 kg·ha -1 a.i. provided inconsistent control but acceptable cover.
- Taxon
- BermudagrassCynodon dactylont0
- Treatment
- dithiopyr at 0.3 kg·ha -1 a.i. (30 DBO + 30 + 120 DAO)e0
- Interactor
- annual bluegrasse0weed
- Outcome
- inconsistent annual bluegrass controle0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“dithiopyr at 0.3 kg·ha -1 a.i. (30 DBO + 30 + 120 DAO), and fenarimol (G) at 2.0 kg·ha -1 a.i. (45 + 30 DBO) followed by 0.8 kg·ha -1 a.i. 60 DAO provided inconsistent annual bluegrass control (55% to 75% in 1999 and 87% to 95% in 2000), but offered acceptable turfgrass cover (§70%) each year.”
t0“Bermudagrass”
Claim · model-written summary
Fenarimol G program provided inconsistent control but acceptable cover.
- Taxon
- BermudagrassCynodon dactylont0
- Treatment
- fenarimol (G) at 2.0 kg·ha -1 a.i. (45 + 30 DBO) followed by 0.8 kg·ha -1 a.i. 60 DAOe0
- Interactor
- annual bluegrasse0weed
- Outcome
- inconsistent annual bluegrass controle0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fenarimol (G) at 2.0 kg·ha -1 a.i. (45 + 30 DBO) followed by 0.8 kg·ha -1 a.i. 60 DAO provided inconsistent annual bluegrass control (55% to 75% in 1999 and 87% to 95% in 2000), but offered acceptable turfgrass cover (§70%) each year.”
t0“Bermudagrass”
Claim · model-written summary
Remaining treatments generally provided under 50% annual bluegrass control in one or both years.
- Taxon
- BermudagrassCynodon dactylont0
- Treatment
- remaining treatmentse0
- Interactor
- annual bluegrasse0weed
- Outcome
- annual bluegrass controle0
- Value
- <50%e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The remaining treatments were generally ineffective and provided <50% annual bluegrass control one or both years.”
t0“Bermudagrass”
Claim · model-written summary
The authors recommend oxadiazon 60 days before overseeding for annual bluegrass control.
- Taxon
- bermudagrassCynodon dactylone0
- Treatment
- Oxadiazon applied 60 DBO at 2.2 kg·ha -1 a.i.e0
- Interactor
- annual bluegrasse0weed
- Outcome
- excellent option for annual bluegrass controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oxadiazon applied 60 DBO at 2.2 kg·ha -1 a.i. provides an excellent option for annual bluegrass control in overseeded bermudagrass putting greens.”
The same questions in other papers
Oxadiazon · control · Cynodon dactylon (Bermuda grass)Positive and negative results
5 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
3 papers more in this group
See all 7 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.