What Would Cause Large Fronds Of Leaves To Fall Off Pecan Tree, Rather Than The Normal Loss Of Individual Leaves?

Question

Pecan tree also had tons of nuts, black still in hull were no good

Answer 1

The university references mentioned defoliation as a disease symptom but not "whole fronds." This guide is comprehensive and should help narrow it down.

https://pecankernel.tamu.edu/diseases/