Houston County Extension ANR

Desirable Leaf Drop

According to Dr. Lenny Wells out Pecan Specialist:

This is an annual occurrence and is a physiological condition we see more pronounced when there is a fast change in environmental conditions as we’ve seen recently with a shift from cool and wet to hot and dry weather. Desirable is more sensitive than many other cultivars to this and many other problems. Last year this occurred in early June but the tree’s foliage/crop development as well as the shift in weather conditions has occurred earlier this year.