Phil from Fairfield Ct writes
Bonide INFUSE Systemic Disease Control is not labeled, specifically for boxwood blight, so we do not have a rate recommendation for this product. Boxwood blight is a serious disease, and while fungicides can be used to help prevent spread, they will not cure plants that are already diseases. You may use a chlorothalonil product such as Fung-onil Fungicide to help protect plants from this disease.
This article from the Purdue Extension has excellent information about this disease and how best to prevent it.
Answer last updated on: 07/16/2021