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Table 3 Percentage of leaves with galls (LWG) and galls per infested leaf (GIL), for five grape cultivars, in Juanicó and Progreso, Uruguay

From: Life history and assessment of grapevine phylloxera leaf galling incidence on Vitis species in Uruguay

Growing season

Cultivar

Juanicó

Progreso

Mean LWG

Mean GIL

MeanLWG

Mean GIL

2004–2005

3309C

58.10

a*

45.36

a

    

Chardonnay

1.20

c

4.33

d

51.79

b

21.39

d

C. Sauvignon

31.81

b

16.16

d

67.70

ab

70.25

a

Viognier

37.05

ab

17.80

d

70.40

ab

55.94

b

Tannat**

0.00

   

0.00

   

2005–2006

3309C

55.74

a

28.63

b

    

Chardonnay

2.86

c

16.31

d

8.80

cd

14.36

e

C. Sauvignon

23.00

b

23.05

c

6.68

d

5.79

e

Viognier

14.51

bc

13.55

d

22.09

c

12.25

e

Tannat

0.00

   

0.00

   

2006–2007

3309C

        

Chardonnay

    

81.18

a

30.18

c

C. Sauvignon

43.99

a

30.63

b

54.05

b

33.08

c

Viognier

46.11

a

29.20

b

70.72

ab

32.12

c

Tannat

0.00

   

0.00

   
  1. * Numbers in a column followed by the same letter are not statistically different (P > 0.05) according to the χ2 test when comparing the cultivars in each locality.
  2. ** Tannat was not included in the statistical analysis.