What happened
A tiny beetle, no larger than a sesame seed, is capable of killing entire rows of mature trees, according to reports.
This pest, known as the polyphagous shot hole borer, has triggered a deadly crisis for urban trees across several nations.
In South Africa, the town of Stellenbosch — famous for its oak-lined streets for nearly 350 years — is among the affected areas.
Why it matters
Urban trees provide shade, beauty, and ecological value, and losing whole rows of them can dramatically alter city landscapes.
For a town like Stellenbosch, whose identity is tied to its oaks, the borer threatens not just trees but a centuries-old heritage.
The beetle's tiny size and broad host range make it difficult to control, potentially allowing the crisis to spread further.
Key facts
The polyphagous shot hole borer is described as small as a sesame seed but able to kill entire rows of big trees.
The beetle has caused a death crisis for urban trees in multiple countries.
Stellenbosch in South Africa has been known as the 'City of Oaks' for nearly 350 years, with oak trees lining its streets.
What to watch next
Observers will be watching how Stellenbosch and other cities respond to protect their tree canopies from the borer.
The potential for the pest to spread to new regions or tree species remains a key concern for urban forestry.
Research into effective control methods will be crucial to mitigating further losses.