Abstract
Abstract Methiozolin was registered for preemergence and postemergence annual bluegrass control in 2019 and offers good cool‐season turfgrass safety. The methiozolin label indicates that a higher rate is required to effectively control annual bluegrass ( Poa annua L.) at mowing heights greater than that of typical golf course putting greens. Additionally, the herbicide label recommends post‐application irrigation for effective annual bluegrass control that is difficult to administer timely due to demands of golf play. The objective of this research was to determine the effect of mowing height and post‐application irrigation on annual bluegrass control with methiozolin. Three field studies were initiated in Blacksburg, VA, on creeping bentgrass ( Agrostis stolonifera L.) and Kentucky bluegrass ( Poa pratensis L.) research fairways as a split‐plot design, with three mowing heights (0.15, 0.30, and 0.6 inches) as main plots. Subplots were arranged as a four by two factorial with four levels of methiozolin rate (0.45–3.6 lb ai acre −1 ) and two levels of post‐application irrigation (0 and 0.2 inches). At all locations, as mowing height increased, more methiozolin was required to control annual bluegrass 80% (C 80 ). At two of the three locations, post application irrigation increased annual bluegrass control at 0.3 inches or higher heights of cut. When turf was maintained at 0.3 inches, annual bluegrass C 80 was reduced by approximately 50% with post application irrigation compared to no irrigation in two of the three trials. Results from these studies support product label recommendations regarding increased use rates with higher heights of cut but cannot confirm the need for post‐application irrigation in putting green height turf.
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Claims 5
Claim · model-written summary
As mowing height increased, more methiozolin was required to control 80% of annual bluegrass (C80).
- Taxon
- creeping bentgrass
Agrostis stoloniferae1 - Treatment
- mowing heighte0
- Interactor
- annual bluegrasse0weed
- Outcome
- control annual bluegrass 80% (C 80)e0
- Direction
- moree0
- Setting
- Blacksburg, VAe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At all locations, as mowing height increased, more methiozolin was required to control annual bluegrass 80% (C 80)”
e1“Three field studies were initiated in Blacksburg, VA, on creeping bentgrass ( Agrostis stolonifera L.)”
Claim · model-written summary
At two of three locations, post application irrigation increased annual bluegrass control at 0.3 inches or higher heights of cut.
- Taxon
- creeping bentgrassAgrostis stoloniferae1
- Treatment
- post application irrigatione0
- Interactor
- annual bluegrasse0weed
- Outcome
- annual bluegrass controle0
- Direction
- increasede0
- Qualifier
- at 0.3 inches or higher heights of cute0
- Setting
- Blacksburg, VAe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At two of the three locations, post application irrigation increased annual bluegrass control at 0.3 inches or higher heights of cut”
e1“Three field studies were initiated in Blacksburg, VA, on creeping bentgrass ( Agrostis stolonifera L.)”
Claim · model-written summary
At 0.3 inches turf height, post application irrigation reduced annual bluegrass C80 by approximately 50% compared with no irrigation, in two of three trials.
- Taxon
- creeping bentgrassAgrostis stoloniferae1
- Treatment
- post application irrigatione0
- Interactor
- annual bluegrasse0weed
- Outcome
- annual bluegrass C 80e0
- Direction
- reducede0
- Value
- approximately 50%e0
- Qualifier
- in two of the three trialse0
- Comparator
- no irrigatione0
- Setting
- Blacksburg, VAe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When turf was maintained at 0.3 inches, annual bluegrass C 80 was reduced by approximately 50% with post application irrigation compared to no irrigation in two of the three trials”
e1“Three field studies were initiated in Blacksburg, VA, on creeping bentgrass ( Agrostis stolonifera L.)”
Claim · model-written summary
The results support product label recommendations for increased use rates with higher heights of cut.
- Taxon
- creeping bentgrassAgrostis stoloniferae1
- Outcome
- increased use rates with higher heights of cute0
- Setting
- Blacksburg, VAe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Results from these studies support product label recommendations regarding increased use rates with higher heights of cut but cannot confirm the need for post‐application irrigation in putting green height turf”
e1“Three field studies were initiated in Blacksburg, VA, on creeping bentgrass ( Agrostis stolonifera L.)”
Claim · model-written summary
The results cannot confirm the need for post-application irrigation on putting green height turf.
- Taxon
- creeping bentgrassAgrostis stoloniferae1
- Outcome
- the need for post‐application irrigation in putting green height turfe0
- Setting
- Blacksburg, VAe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Results from these studies support product label recommendations regarding increased use rates with higher heights of cut but cannot confirm the need for post‐application irrigation in putting green height turf”
e1“Three field studies were initiated in Blacksburg, VA, on creeping bentgrass ( Agrostis stolonifera L.)”