What is the most important chemical approach to controlling Poa annua?
PGR’s
“expliot the growth factor”
Know how to draw the fucking graph…
Go ahead, draw that bitch…..
FInale and Roundup are examples of what kind of Herbicide?
How would you use them to control poa?
- Non-selective herbicide
- Spot treatment
Are Post Emergent herbicides okay to use on putting greens to control poa?
Helllls No
When spot treating Poa with a non-selective herbicide….what should you add to the chemical?
Dye/tracker
What are the best options for controlling Poa annue on greens?
- Improve the growing environment (good drainage/full sun)
- collect cliipings when seedheads are present
- Spoon feed N in the summer
- Avoid winter or dormant applications of Nitrogen where Poa is problematic
- Restrict irrigation in the summer
- Aerify in late summer, before Poa germinates
- Vigilant plugging or spot treatment of a non-selective herbicide
- Use PGR’s - Paclobutrizol or Flurprimidol
What are the best options forcontrolling Poa on Tees, Fairways and Greens Surrounds?
- Improve growing conditions ie. sunlight & improve drainage
- Use tri-plex mowers, not heavy ganf units
- collect clippings when Poa seedheads are present
- Restrict irrigation in the summer
- Core in late summer, before Poa seed germination
- Avoid winter or dormant N applications
- Herbicides and PGR’s
What are some benefits of using PGR’s on the golf course?
- – Reduce clippings and mowing demands
- – Improve and maintain consistent green speed
- – Improve density and ball lie
- – Management of summer stress (esp. TE)
- – May increase disease control residual of fungicides
- – Increase carbohydrate reserves
- – Suppress Poa annua Seedheads and/or Growth/Competitiveness
What is Embark T&O (Mefluidide) used for?
- Poa annua seedhead suppression
What are Trimmit or Turf Enhancer (Paclobutrizol) used for?
ABG growth suppression
What is Cutless (flurprimidol) used for?
ABG growth suppression
What is Primo MAXX (Trinexapac-ethyl) used for?
- Improves the ABG ability to tolerate summer stress
What is Proxy (Ethephon) used for?
ABG seedhead suppression
When do you want to apply Mefluidide (Embark) ?
As first seedheads enter “boot stage” in early spring
When do you want to apply Proxy?
What is a side effect of Proxy on Bentgrass?
- When the seed enters “boot stage” in early spring.
- Side Effect: 2 or more applications can cause stem elongation and scalping of bentgrass
Besides herbicides…what else has pre-emergent activity on ABG?
paclobutrizol and flurprimidol (trimmet and cutless)
When Poa is growing more rapidly than bentgrass in the Spring and Fall…what type of rates and applications should you put down when using Trimmet or cutless?
7-14 day intervals using lower rates
Multiople fall applications of _________ PGR will provide pre-emergence Poa annuacontrol?
Paclobutrizol or Flurprimidol (Trimmit and cutless)
True or False
You must water Trimmit and Cutless in after application?
True.
The product is taken up through the roots
What are Are The BEST Options For Preemergence Poa Control On Greens?
Trimmit or Cutless
(Paclobutrizol or Flurprimidol)
When using a PreEmergent herbicide to control Poa in Roughs….what is the most Highly effective product to use?
Barricade
_____________ Gives Best Combination of ABG and Broadleaf Winter Annual Control.
Pendulum (Pendimethalin)
When do you apply a pre emergent herbicide in the rough to control Poa annua?
Following a significant rain event in early september
