Oak Processionary Moth (OPM): Risks & Control in the UK
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Oak Processionary Moth (OPM) in the UK
Threats to Oak Trees and Public Health
The oak processionary moth (OPM) is an invasive pest that poses significant threats to oak trees and human and animal health. Accidentally introduced to England in 2005, OPM larvae (caterpillars) feed on oak leaves, potentially defoliating entire trees and making them susceptible to other diseases and stressors.
Government Control Measures and Protected Zones
The UK government has implemented a comprehensive program to monitor, control, and minimize the spread of OPM. Most of Greater London and some surrounding counties are established OPM areas. To prevent further incursions, the rest of the UK is designated as a Protected Zone (PZ) under European Union regulations,