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

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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

Growing season	Cultivar	Juanicó				Progreso
Growing season	Cultivar	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

* 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.
** Tannat was not included in the statistical analysis.