Low persistence of Phytophthora ramorum (Werres, De Cock, and Man in ‘t Veld) in western France after implementation of eradication measures

Key message

Presence of Phytophthora ramorum (Werres, De Cock, and Man in ‘t Veld) in western France was studied after the detection of this invasive pathogen in 2017 in Larix kaempferi (Lamb.) and eradication of the affected stands. P. ramorum was seldom detected in the area of the outbreak in the year following eradication. However, we confirm that P. ramorum can multiply to epidemic level on chestnuts (Castanea sativa Mill.) in the absence of larch (Larix spp.). This represents the major risk in France.

Keywords
Castanea sativa; Larix kaempferi; Epidemiology; Invasive forest pathogen

Publication
Beltran, A., Laubray, S., Ioos, R. et al. Low persistence of Phytophthora ramorum (Werres, De Cock, and Man in ‘t Veld) in western France after implementation of eradication measures. Annals of Forest Science 81, 7 (2024). https://doi.org/10.1186/s13595-024-01222-1

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Data and/or Code availability
The datasets during and/or analyzed during the current study are available from the corresponding author on reasonable request.

Handling Editor
Aurélien Sallé