Product Q&A

Answer:

Barricade 65WG Herbicide would not be applied in March for poa but rather the fall, and we have heard of many customers experiencing resistance with its active ingredient so we usually suggest going with other ingredients and formulations for poa control instead. Since poa annua and cool season grasses are so closely related, there are few products that will kill the poa annua without also harming the lawn. The only one we are currently aware of is called Prograss which can kill & prevent poa and can be applied at seeding, however it can only be applied to residential lawns by licensed applicators. You may want to see if a service local to you can provide this chemical treatment to your lawn.
 
Your only other option would be to spot-treat with a Roundup-type product and then reseed with the desirable grass type in those areas. You can use a pre-emergent like Dimension 2EW or Pendulum 2G in the fall and spring when you are not over seeding to help prevent the poa from emerging. Typically a split treatment in the fall will yield to longer and better prevention of the weeds. You would need to skip your fall overseeding and use a pre emergent during that time if you want to effectively stop poa from emerging as that is its prime cycle time frame. You could swap your pre emergent and seeding time frame for a year and do a pre emergent in the fall and overseeding in the spring to help still fill in your lawn while eliminating most of the weed. Keep in mind weed seeds can lay dormant in the soil for a few years so you may need to do this again the following year or in a few years depending on the density of the weed. 
 
When/How to Apply a Fall Pre Emergent: https://www.domyown.com/do-my-own-lawn-care-fall-preemergent-application-v-315.html
 
Pendulum 2G: https://www.domyown.com/pendulum-2g-granular-herbicide-p-1498.html
 
Dimension 2EW: https://www.domyown.com/dimension-2ew-herbicide-p-1494.html
 

Answer last updated on: 05/18/2023

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