Table 1 Prevalence of B. dothidea and N. parvum species in the two geographical areas and the two tissue types in 2020 and 2021.

From: Genetic diversity and population structure of Botryosphaeria dothidea and Neofusicoccum parvum on English walnut (Juglans regia L.) in France

Criterion

Condition (total number of samples)

Prevalence of B. dothidea in % (total number of samples)

Prevalence of N. parvum in % (total number of samples)

Geographical origin

South-East (281)

31.7aA (89)

18.1bB (51)

South-West (360)

10.8bB (39)

28.6aA (103)

Total

641

20.0 (128)

24.0 (154)

Tissue type

Husks (326)

28.5aA (93)

26.1aA (85)

Twigs (315)

11.1bB (35)

21.9bA (69)

Total

641

20.0 (128)

24.0 (154)

Presence of symptoms on husks (2021)

Asymptomatic husks (54)

22.2aA (12)

7.4aA (4)

Symptomatic husks (212)

28.3aA (60)

25.9aA (55)

Total

266

27.1 (72)

20.3 (59)

Presence of symptoms on twigs (2021)

Asymptomatic twigs (63)

4.8aA (3)

11.1aA (7)

Symptomatic twigs (252)

12.7aA (32)

24.6aA (62)

Total

259

13.5 (35)

26.6 (69)

  1. Prevalence in symptomatic and asymptomatic tissues was only evaluated in 2021. Different lowercase letters indicate significant differences between conditions of the same criterion for each species at the α = 0.05 threshold based on the chi-squared test. Different uppercase letters indicate significant differences between the two species for each condition at the α = 0.05 threshold based on the chi-squared test.
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