Polyphagous Shot Hole Borer


JOHANNESBURG URBAN FOREST ALLIANCE

The Shot Hole Borer Beetle is destroying our Urban Forest

The polyphagous shot hole borer (pshb) is a type of amborsia beetle that is currently infesting over 200 tree species around the country.

This tiny beetle, the size of a sesame seed does not itself kill the tree, rather
it is the fungus that accompanies the beetle and grows in the borer tunnel.

This fungus impacts the trees vascular system and inhibits the flow of water and nutrients within the tree.

How to identify symptoms:

As the beetle is so tiny it is often not seen, therefore it is better to look for signs of infestation. Symptoms vary from species to species.

JOHANNESBURG URBAN FOREST ALLIANCE


Be part of the solution,
Report Infested Trees!


Report directly to Joburg Parks via whatsapp:
JOHANNESBURG URBAN FOREST ALLIANCEJOHANNESBURG URBAN FOREST ALLIANCE

Reporting Instructions


Download the Treesurvery app:
JOHANNESBURG URBAN FOREST ALLIANCE

Google Play Link


Report via Email:
JOHANNESBURG URBAN FOREST ALLIANCE
diagnostic.clinic@fabi.up.ac.za

Please Include :

  • Photos of symptoms
  • Type / Species of tree
  • Street Address / GPS co-ordinates
  • Contact details


Watch the video below:

In South Africa, some Evergreens are also affected




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HELP STOP THE SPREAD
Infested and dead trees are a breeding ground for shot hole borer (PSHB). Recent tests Indicate that ONE heavily infested tree contains over 100,000 beetles. Dead trees need to be removed and disposed of responsibly.



How to dispose of
infested plant material:

  • Cut infested branches into small pieces.
  • Put into refuse bags and seal.
  • Keep in direct sunlight, the heat from the
    sun will kill the insect and its larvae.

Or

Burn on site.
(Large quantities of infested wood may not be burnt in an urban area)

Or

Consult a tree specialist.

Or

Chip and compost.



Further Reading:


The Conversation
A tiny beetle and its deadly fungus is threatening South Africa’s trees
by Wilhelm de Beer

Read Here

FABI Research Feature
The Polyphagous Shot Hole Borer

Read Here

Australasian Plant Pathology
The polyphagous shot hole borer (PSHB) and its fungal symbiont Fusarium euwallaceae:
A new invasion in South Africa
by T.Paap et al

Read Here