The South African Landscaper's Institute (SALI) is joining the battle to fight the invasive polyphagous shot hole borer (PSHB) beetle that poses a serious threat to both exotic and indigenous trees across South Africa.
The beetle is known to invade the host tree and bore holes in the branches. If undetected, it can destroy a tree within a relatively short period of time.
Adult beetles invade a variety of tree species and dig tunnels to lay eggs. The PSHB beetles then transport a fungus which attacks the tree’s vascular tissue, causing a disease called fusarium dieback (FD).
FD in turn interrupts the supply of water and nutrients to the tree. It’s known that PSHB attacks more than 300 tree species countrywide of which more than 130 of these species are susceptible to FD.
The PSHB beetle attacks a variety of tree species which include oak, most willows, plane trees, avocado, some acacias and most maples.
Reports quoting academic research show that, in other parts of the country, more than 10 000 trees have been lost which could have an adverse effect on the ecosystem and take years to replace.
Metropolitan areas such as Johannesburg and Durban as well as Pietermaritzburg, George and Knysna have lost thousands of trees.
How can you help?
1. Contact a SALI landscaper to advise if you have a PSHB invasion in the trees on your property.
2. Distribute the TWO education posters on the PSHB beetles prepared by SALI.
Poster 1: Are your trees dying
Poster 2: Help the spread of polyphagous shot hole borer (PSHB) beetle
Click here to download the banner: Help stop the spread of polyphagous shot hole borer (PSHB) beetle.