Timing poa seedhead control

Dealing with poa is made a lot more pleasant with seedhead control tools such as Embark (mefluidide) or the combination of Proxy plus Primo (ethephon plus trinexepac–ethyl). But success or failure is highly dependent on timing of application. Apply too early, and there are no seedheads forming to attack. And apply too late, and the seedheads are mature enough to be able to resist attack.

To time your treatments most successfully, use a combination of visual observations and degree day…