June 16, 2019

Latest:

The LafargeHolcim Awards: Entries Open! -

Thursday, June 13, 2019

BTech Students shine at Architectural Awards -

Thursday, June 13, 2019

Cape Town’s Green Map promoting 10 years of sustainable living on World Environment Day -

Thursday, June 13, 2019

Arup breaks ground on new hotel and residential development in airport city in Accra -

Thursday, June 13, 2019

Durban’s bold R62bn facelift plan to boost rates base for city -

Thursday, June 13, 2019

New mixed-use student accommodation revitalises Hatfield Square -

Friday, May 31, 2019

CALL FOR EXEMPLARY CONSTRUCTION PROJECTS & VISIONARY DESIGN CONCEPTS -

Friday, May 31, 2019

Canopy by Hilton to open first Africa property in Cape Town -

Friday, May 31, 2019

Landscape Architecture Foundation announces winners for 2019 Olmsted Scholars Program -

Friday, May 24, 2019

Promenade extension nearing completion -

Friday, May 24, 2019

Arbor City Awards -

Friday, May 24, 2019

Bringing Home the Gold! -

Wednesday, May 22, 2019

Alison Hirsch appointed as USC’s director of Masters of Landscape Architecture + Urbanism program -

Friday, May 17, 2019

City mulls a ‘fresh coat’ to curb bark stripping -

Friday, May 17, 2019

New outdoor gym for Bellville Campus -

Friday, May 17, 2019

CAPE TOWN’S ABSA BUILDING TO BE REDEVELOPED -

Friday, May 17, 2019

FutureScape 2019. Book Your Stand Today! -

Thursday, May 16, 2019

Property developer John Rabie launches new venture in Portugal -

Wednesday, May 15, 2019

Cape Town winner in City Nature Challenge thanks to residents -

Tuesday, May 14, 2019

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Friday, May 3, 2019

baner

baner

POLYPHAGOUS SHOT HOLE BORER- PSBH.CO.ZA

Online resource for Polyphagous Shot Hole Borer (euwallacea fornicatus)

TREATMENT

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:

2017-05-22
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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