April 18, 2019


Institute of Landscape Architecture Malaysia (ILAM), Regulates the profession of landscape architects -

Thursday, April 18, 2019


Thursday, April 18, 2019

City calls on residents and professionals to assist with new local development plans for Cape Town -

Thursday, April 18, 2019

Moshe Safdie Designs Singapore’s Jewel Changi Airport As a Destination Garden -

Tuesday, April 16, 2019

It’s That Time of Year Again & SANBI are Ready to Wow! -

Friday, April 12, 2019

The Hottest New Spot on Florida Road -

Tuesday, April 9, 2019

City completes an array of park and facility upgrade projects -

Sunday, April 7, 2019


Friday, March 29, 2019

Conservation AT Work -

Friday, March 29, 2019

2019 Corobrik-ILASA Awards of Excellence -

Friday, March 29, 2019

South Africa’s First Plastic Road! -

Friday, March 22, 2019

John Deere Power Products celebrates milestone machine -

Friday, March 22, 2019

Jacobsen supports student from South Africa to Staffordshire -

Friday, March 22, 2019

City springs into action to clean and mow parks -

Wednesday, March 20, 2019

Walkway project underway at Homestead -

Friday, March 15, 2019

City receives R50 million to create 1 300 green jobs -

Thursday, March 14, 2019

Public Arts Commission ups funding for Merschel Plaza sculpture -

Friday, March 8, 2019

Comment on the Cape Town Draft Water Strategy – 08 March 2019 -

Friday, March 8, 2019

Corobrik playing its part in looking after the planet -

Friday, March 8, 2019

The Nature of Cities Summit -

Wednesday, March 6, 2019


Online resource for Polyphagous Shot Hole Borer (euwallacea fornicatus)


We have just published the SHOT HOLE BORER “WHAT TO DO” GUIDE that contains a practical guideline on the options that are available for private residents to treat their own trees. This guide does not endorse any specific products, nor does it represent an easy solution to the PSHB crisis South Africa is currently experiencing.

View the guide herePSHB.co.za/what-to-do/

A combination of insecticides and fungicides is required

The Department of Agriculture, Forestry and Fisheries is in the process of declaring PSHB an invasive pest, this status will allow emergency registration of chemical treatments under Act 36.

Currently there are no chemicals products registered for treatment against PSHB in South Africa. Chemical formulations with specific active ingredients have been shown to be effective in US trials, no recommendation is made to use then – local chemical companies need to register their own formulations for use against PSHB under Act 36.

Common sense needs to be combined with practical experience. Contact your local nursery and inquire about available products that can boost your tree’s health.

The following article details a US study to evaluate treatment options against the polyphagous shot hole borer beetle, and provide insights into the need for a combination of injection and contact treatment:

National Center for Biotechnology Information – Journal Article
Evaluations of Insecticides and Fungicides for Reducing Attack Rates of a new invasive ambrosia beetle (Euwallacea Sp., Coleoptera: Curculionidae: Scolytinae) in Infested Landscape Trees in California
The combination of a systemic insecticide (emamectin benzoate), a contact insecticide (bifenthrin), and a fungicide (metconazole) provided some level of control when applied on moderate and heavily infested trees.

Click here for more specialist articles on treatment..

Public Trees vs Private Trees

Viability of treatment protocols differ between public and private trees, poison exposure needs to be considered and cost-benefits evaluated. The total cost of loosing a mature urban tree needs to be measured against the costs of removal, replacement and maintenance time to reach maturity.

In 2010 the “Greening Soweto” project was launched which aimed to plant more than 300,000 trees – this project was supported by Johannesburg City Parks as a fundamental trans-formative initiative for the city – now that these trees have been found to be infested by PSHB they require urgent treatment.

Mature urban trees such as the London Plane trees that encircle the entire Johannesburg Zoo are under attack – will these giant trees simply be chopped down, or will policy make provision for heritage public trees to receive treatment?

Many streets in Johannesburg are now lined with dead trees, these must be removed and the infested wood disposed of responsibly. City Parks need to create controlled sites where infested wood can be burnt so that the beetles within do not emerge and fly further.

“Tree Injection” vs “Crown Spray and Soil Drench”

Tree injection is optimal for the treatment of public space trees since no poison is exposed once the treatment has been applied.

Surface application of chemical poisons pollutes the ecosystem, and makes the immediate area toxic. Pets walk under poisoned trees and accumulate poison on their feet, which subsequently get licked and ingested.

Micro-injecting treatment into London Plane
Micro-injecting a London Plane tree to protect it against polyphagous shot hole borer
ArborJet Tree I.V. system for micro-injection
ArborJet Tree I.V. system for micro-injection of treatment against polyphagous shot hole borer

Do you need help? We can recommend a service provider in your area who knows how to treat PSHB?

For more visit www.PSHB.co.za or click here

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