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Table 1 Results of 2019–2021 surveys on woody hosts within or in the neighborhood of former P. ramorum outbreaks (post-eradication survey)

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

Type

Species

Number of individuals observed

Number of individuals with symptoms

Number of samples

Number of P. ramorum detections

Forest settings

Castanea sativa

> 1060

48

45

7

Ilex aquifolium

> 80

1

1

0

Larix kaempferi

104

5

5

0

Rhododendron spp.

 > 100

7

6

2

Others: Acer pseudoplatanus, Rubus spp., Taxus baccata

14

3

3

0

Total

> 1600

33

60

9

Nurseries surrounding, Garden

Camellia spp.

56

0

0

0

Castanea sativa

> 390

11

11

1

Fraxinus excelsior

46

6

6

0

Ilex aquifolium

45

1

1

0

Larix spp.

3

0

0

0

Lonicera periclymenum

42

1

1

0

Quercus ilex

17

1

1

0

Quercus rubra

48

3

3

0

Rhododendron spp.

> 230

19

15

6

Sambucus nigra

77

4

4

0

Viburnum tinus

49

2

2

0

Others (Acer pseudoplatanus, Arbutus unedo, Calluna vulgaris, Euonymus europaeus, Ligustrum vulgare, Magnolia soulangeiana, Quercus palustris, Salix caprea, Syringa vulgaris)

29

2

2

0

Total

> 1170

10

47

7