Fig. 3From: Two decades of epidemiological surveillance of the pine wood nematode in France reveal its absence despite suitable conditions for its establishmentSampling effort in the framework of French monitoring of the PWN from 2000 to 2019 for a wood-based commodities, b samples of wood collected from standing trees and c collections of insects from Monochamus spp. traps. For each map, we have indicated the proportion of samples for each region (out of the total sampling), while the number of samples is indicated in bracketsBack to article page