PoaConstrictor® is labeled for both pre-emergent and postemergent control of many annual grasses and broadleaves on ornamental turf such as golf courses, sod farms, parks, cemeteries and residential or commercial lawns.
Higher AI concentration, lower use rates
Unique water-based formulation
Pre-emergent and post-emergent application
Multi-season use: fall (germination) and spring (growth) periods
PoaConstrictor can be used in cool season grasses and overseeded Bermudagrass
Controls Poa annua during both cool season germination and warmer growth periods
Broad spectrum control of annual grasses and broadleaf weeds
Safe for use on overseeded turf
• For fall control of annual bluegrass, begin applications of PoaConstrictor Herbicide during the period of maximum weed germination and end as close to the first killing freeze as possible.
• Make spring applications during the period of maximum weed germination. Consult your weed science specialist or university extension service for the recommended application timing in your area. Spring applications are most effective following fall applications.
To be effective, 3 applications in the fall are needed. And it will need to be applied every year, without stopping. However, there are resistant biotypes of Poa Annua that will not be killed. Those biotypes will flower and produce seed which will germinate. Another option is to apply a pre-emergent herbicide in the spring and fall. Example products are Barricade, Dimension, or Pendulum. These are granular formulations available for you to use a drop spreader to apply. Unfortunately, these products only prevent the Poa from germinating and will not kill mature plants.
Poa Constrictor Herbicide does not give a max annual rate on the product label, it only lists that you can apply 2-3 times at 21-28 day intervals. The rate to use is 24-48 oz per acre or 3/4 - 1/12 flo oz per 1000sqft. The specific instructions for Turf Type Tall Fescue are as follows: Make applications in the fall. If overseeding with TTTF, application may be done at the same time as seeding.