Robinia Frisia Health Problems

Question

small robinia, 5 years old, has been perfect health until I cut back a few overly long branches in early spring, leaveflets on new shoots have turned brown and crisp at the ends while the resto of the small tree looks fit and healthy. I’ve had very long hot spring and summer days and may not have watered as I should, Its on clay soil in full sun. Hoping its not the frisia die back Any suggestions please.

Answer 1

It sounds like it has contracted an infection. Likely, this happened from non-sterile pruning sheers. You can try and treat with a fungicide.

Here are some articles that will help:

https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm

https://www.gardeningknowhow.com/ornamental/trees/locust/growing-black-locust-trees.htm