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Nikki from Santa Fe, Nm writes

Will Garden Phos Systemic Fungicide control black spot on aspens?

Daconil is not working.


Monterey Garden Phos Systemic Fungicide is not labeled to be used for black spot on aspens.  Daconil works best when applied in the spring before leaf spots occur for prevention.  There is a great article here from the USDA on the most common causes that might be helpful.

Answer last updated on: 09/21/2017

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