Marla from Alameda, Ca writes
The label of this product does not include Armillaria in its list of fungi, but is there any anecdotal evidence of successful off-label usage to rid garden soil of the pathogen in buried rhizomorphs or fragments of infected root material?
Monterey Garden Phos is a fungicide for listed soil-borne and air-borne pathogens, and it will not treat Armillaria mellea/honey mushroom or other fungi similar to that. Since there are no known treatments for this fungus, it is best to plant trees that are known to be resistant to it. This article has more details.
Answer last updated on: 12/20/2019
