Table 3.

GPGV incidences and spatial analysis within vineyards

Vineyard	Year	Total	Healthy	GPGV incidence		Latent	Symptomatic		Runs analysis				Gradient
		[n]	[n]	[n]	[%]	[n]	[%]	[n]	[%]	Along rows	Across rows	Rows	Plants	r2	Direction
GEM	2019	457	356	101	22.1	66	14	35	8	ns	***
	2020		306	151	33.0	117	26	34	7	ns	ns
	2021		311	146	31.9	113	25	33	7	ns	ns	1–6	1–39	0.70	Across rows
HEC	2018	224	112	112	50.0	86	38	26	12	***	***	1–9	1–31	0.73	Across rows
	2019		46	178	79.5	137	61	41	18	**	**
	2020		30	194	86.6	135	60	59	26	–	–
	2021		3	221	98.7	151	67	70	31	–	–
NIM	2019	478	81	397	83.1	344	72	53	11	***	***	1–6	1–41	0.98	Across rows
	2020		37	441	92.3	385	81	56	12	–	–
	2021		50	428	89.5	310	65	118	25	–	–
REI	2018	375	166	209	55.7	93	25	116	31	***	***
	2019		107	268	71.5	85	23	183	49	–	–
	2020		91	284	75.7	88	23	196	52	–	–

Listed are the number (n) of healthy, GPGV latent infected and GPGV symptomatic vines of all four vineyard observed in this study between the years 2018 and 2021. Runs analyses and the presence of infection gradients were calculated by PATCHY [27]

Tukey HSD test: ns not significant, **p-value < 0.01; ***p-value < 0.001; − no relevant results due to too high GPGV incidences

r² = correlation coefficient