Knowledgebase
Lawn fungus #877486
Asked July 16, 2024, 2:00 PM EDT
Ramsey County Minnesota
Expert Response
There are many fungi that infect lawns and you don’t say if you identified what kind of fungus you found in your lawn. It is important to use a product that identifies your fungus as a target.
The timing of your applications is important. You will notice in the EPA document cited below that application timing differs with the fungi.
Also, the literature says that Propiconozole has a 30 day residual effect. You said that you have applied it several times and I don’t know how many that is. Be careful not to over-apply as you can build in resistance.
Propiconozole is a systemic. You may want to alternate it with a contact fungicide.
https://www3.epa.gov/pesticides/chem_search/ppls/<personal data hidden>9-20070928.pdf