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…
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Tuesday, 27 February 2018 11:35

Check your trees for the shot hole borer

Are your trees dying? Get a SALI landscaper or arboriculturist to help you with identifying the Polyphagous Shot Hole Borer in your area. Who discovered the borer? Last year, the Forestry and Agricultural Biotechnology Institute (FABI) undertook a survey of tree health in the botanical gardens of South Africa. The project - entitled ‘Monitoring tree health at sentinel sites: botanic gardens and arboreta’ - was funded by the South African National Biodiversity Institute. FABI is a post-graduate research institute was established in 1997, based on a recognition that the future of forestry and agriculture in…
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The Polyphagous Shot Hole Borer (PHSB) and Fusarium dieback is a new insect-disease complex threatening South Africa. Up to 60 species of alien and indigenous trees are under threat, including avocado trees. Do you have shot hole borer damage in your trees? The team from the Forestry and Agricultural Biotechnology Institute (FABI) at the University of Pretoria have compiled a tool kit of images. If you think you have shot hole borer, contact a SALI landscaper or arboriculturist for assistance in your area. 
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The invasive Asian polyphagous shot hole borer (PSHB) - also known as an ambrosia beetle - is a tiny black beetle the size of sesame seed (2mm). The adult females:  Carry a fungus with them from tree to tree.  Burrow into a tree - 60 species have been affected worldwide.  Make tunnels or galleries in the trunks and branches of the host tree.  Deposit the fungus they carry, which then grows into the walls of the wood in the tunnels.  Lay their eggs in the tunnels or galleries. The fungus grows in the galleries. The adult…
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