Phytopthora

In this Thursday episode of Talking Trees, we focus on the global threat posed by Phytophthora species, aggressive plant pathogens that have devastated forests, gardens, and natural landscapes worldwide.

We discuss:

• The biology and life cycle of Phytophthora fungi-like organisms, including their ability to spread through water, soil, and infected plant material
• The impact of Phytophthora ramorum and Phytophthora kernoviae in the UK, with studies estimating significant public value at risk across woodlands and heritage landscapes
• Broader examples such as Phytophthora cinnamomi, responsible for widespread root rot in forest trees across Australia and the Americas
• Common symptoms of infection: crown thinning, bleeding cankers, dieback, and root decay
• The importance of early detection, biosecurity measures, and public awareness to limit spread and protect vulnerable ecosystems

Phytophthora continues to reshape forest health policy and underscores the need for vigilant, science-informed tree management.

Background information:

• Drake et Jones. 2017. Public value at risk from Phytophthora ramorum and Phytophthora kernoviae spread in England and Wale.pdf
• Hardy. 2004. Phytophthora Root Rot of Forest Trees.pdf

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