Welcome to Resist Poa

Annual bluegrass (Poa annua) is a troublesome weed in turfgrass and other landscapes. Its invasive biology and acquired herbicide resistance challenges turfgrass managers by increasing costs and compromising expected outcomes.

A team of 16 university scientists have embarked on a $5.6 million project to limit the impact of annual bluegrass in athletic, golf, lawn, and sod farm turfgrass. The team’s multifaceted approach, funded by USDA-NIFA Specialty Crops Research Initiative (SCRI), has the following objectives:

  • Characterize the nationwide distribution of herbicide-resistant Poa annua populations
  • Seek weaknesses in the weed’s biology and growth characteristics in order develop non-chemical control strategies
  • Identify socio-economic constraints that may affect control strategies and stewardship of herbicide technologies
  • Develop and deliver best management practices (BMPs) through Cooperative Extension and education.
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About Poa annua

Poa Annua

Commonly known as annual bluegrass (North America) or annual meadow-grass (Europe). Colloquially known as Poa.

Poa Annua

An annual, capable of perenniating. Originated in Europe. Widespread in temperate climates around the world.

Poa Annua

It is a common constituent of maintained turf, as well as waste areas. It can be a weed or a desirable turf species for golf courses.

Poa Annua

Open and triangular shaped panicle. Spikelets are stalked and awnless.

Methodology

  • Methodology

    Survey clients

  • Methodology

    Collect plants from surveyed sites

  • Methodology

    Record site data

  • Methodology

    Propagate plants

  • Methodology

    Screen for resistance

  • Methodology

    Collect seed from survivors

  • Methodology

    Investigate modes of resistance

  • Methodology

    Measure stakeholder knowledge

Herbicide Resistance BMPs

Herbicide Resistance BMPs
An integrated approach is required
  • Appropriate grass species/variety selection for end use.
  • Cultural practices that favor the desired grass.
  • Preventative control strategies, including “Quarantine”
    suspected resistant areas, and using “clean” sod and seed.

 

Read More...

 

When using herbicides
  • Use labelled rates at appropriate timings and stages of growth.
  • Use multiple herbicide sites of action (SOAs) with overlapping spectrums of weeds controlled.
  • Scout after application and avoid allowing weeds to go to seed or proliferate vegetatively.

 

Read More...

Herbicides
Herbicide Resistance
An integrated approach is required
  • Appropriate grass species/variety selection for end use.
  • Cultural practices that favor the desired grass.
  • Preventative control strategies, including “Quarantine”
    suspected resistant areas, and using “clean” sod and seed.

Read More...

Herbicide Resistance
When using herbicides
  • Use labelled rates at appropriate timings and stages of growth.
  • Use multiple herbicide sites of action (SOAs) with overlapping spectrums of weeds controlled.
  • Scout after application and avoid allowing weeds to go to seed or proliferate vegetatively.

Read More...

Survey

Want to be a survey site?

Scan this QR-Code with your mobile device
Or go to bit.ly/ResistPoa

Participating in this Texas A&M survey helps us to identify potential collection sites with unique populations.

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