Blogs » Don's Expert Answers » Don’s Expert Answers: Branch lesion with white dust

Don’s Expert Answers: Branch lesion with white dust

© 2026 CTC Productions Pty Limited. All rights reserved. The material presented on this website, may not be reproduced or distributed, in whole or in part, without the prior written permission of CTC Productions.

Question From:
in Marian, Marian Queensland

Nature of problem:
Branch lesion with white dust

Type of Plant (if known):
Avocado, mango, soursop

Symptoms of Plant Illness (please try NOT to diagnose your problems yourself):
Splits in branch

Soil Type (e.g. sandy, clay or loam) OR Potting Mix Type:
Various

How often do you water the plant:
Fortnightly

How many hours of sunlight does the plant get each day:
6

How long since you planted it:
5 years

Have you fertilised? If so, with what and when:
Dried cow manure, osmocote

Is the plant indoors or outdoors:
Outdoors

Is the plant in a pot or in the ground:
In the ground

What other treatments have you given the plant:
Mancazeb

Upload photo if available:

Other Comments:
This photo shows exactly what many of my trees are presenting

Answer:
I am not sure. These could be tension splits caused when heavy rain follows a very dry period. The trunk rapidly swells with water which splits open the trunk. Mancozeb is fine. I would just wait: don’t either water or fertilise. Don

Stay In Touch

Burke's Backyard Videos

Popular Posts