Bill from Greensburg, Pa writes
Should I apply this product before I see red thread or dollar patch on my lawn? If so, when should I apply it? Also, how often after that. Last year I used the product when my yard was in terrible shape with brown patches everywhere
Quali - Pro Chlorothalonil DF Fungicide is best used as a preventative before disease is present but only to non-residential turf grass. We recommend using a product that is labeled for red thread such as Heritage DF 50, Honor Guard PPZ, Armada 50 WP, Fertilome Liquid Systemic Fungicide or Eagle 20 EW. We recommend that you read the product labels available for each of the individual products listed in this answer to see which product will best fit your needs. The product labels are available on each individual product page which you can find by clicking on the links provided above.
We would recommend contacting your local cooperative extension office and speaking directly to the master gardener on staff. Master gardeners are experts on the plants and plant diseases in their local region and they should be able to tell you exactly when you should perform the application.
Answer last updated on: 03/01/2017
