Mid-to-late fall is still prime time to control Poa annua in warm-season turf. Not only can effective control be achieved, herbicide mixes used at this time will go a long way to minimize the chances of resistance.
Why wait? Specticle® FLO applied in early fall has been exceptionally effective for many years, but waiting later to apply after significant Poa germination is observed using a PRE/POST tank-mix provides greater benefits including:
- Wider window of application since annual bluegrass germination can vary from year to year
- More flexibility due to variable fall/winter weather including:
- Heavy rainfalls from tropical storms that could leach and degrade herbicides
- Warm temperatures that could encourage annual bluegrass germination throughout the winter
- Severe cold that could exaggerate winterkill
- University research has shown that tank-mixing herbicides with different sites of action is more effective than rotating herbicides with different sites of action when weed resistance management is being considered
- Designed to deliver consistent annual bluegrass control and reduce the likelihood of developing resistance
- PRE3 applications are designed or be applied later than the traditional PRE-only applications in late summer
- Single or split applications of PRE3 can be made starting in late-October or November based on your location, weather, amount of annual bluegrass germination, etc.
- Rates, timings, and application intervals can also be based on weather and previous experience
- PRE3 also controls problematic winter annual broadleaves and annual sedges
- RoundUp® could be rotated in the tank-mix for non-selective control on dormant fairways for another herbicide site of action
- Glufosinate could also be rotated in the tank-mix for still another non-selective site of action
More information – always refer to the label for specific recommendations.Contact your Envu area sales manager if you need assistance
Envu’s PRE3 tank-mix will control emerged Poa and other weeds, plus provide long-term residual control (Envu).