Tar spot has been found in Nebraska corn, but researchers say to wait on fungicide and explore plant nutrition strategies ...

Wet weather during the hot summer or cooler winter months can cause disease problems for our lawns and shrubs.

Two good fungicides for ornamentals are copper or a systemic fungicide. Copper should be used sparingly as it can accumulate and become toxic if used too frequently.

Fungicides also do life-saving work: fungal infections are the leading cause of crop failures, destroying up to 40% of the world’s annual harvest, the equivalent of food for 4bn people.

(Beyond Pesticides, March 25, 2025) An editorial in Expert Review of Cardiovascular Therapy finds that triazole fungicides pose a significant risk of cardiotoxicity with “growing concerns regarding ...

This seems to keep the disease to a minimum. If needed, a fungicide may be applied every few months. Systemic fungicides labeled for leaf spot control seem to be somewhat effective.