Infected by Neofusicoccum spp., these leaves show extensive lesions and have dried out, curling up from the margins. They will eventually fall from the tree.

Fungicide Sensitivity of Neofusicoccum caryigenum, the Causal Pathogen of Pecan Leaf Dieback

The United States contains the largest acreage of both native and improved pecans (Carya illinoinensis) in the world. In 2022, the United States produced 275 million pounds of pecans, which are valued at $493 million (USDA 2023). Pecan leaf dieback is a new, emerging fungal disease that is threatening United States pecan production in its...

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