Table 2

Relative resistance of grape rootstocks and scion cultivars to M. xenoplax in glasshouse trials.

		Nematodes^b
Cultivar	Rf^a	(g⁻¹ root)
^aReproductive factor: the ratio of the final nematode population density/initial population density per pot. Rf values <1.0 indicate a high level of resistance.
^bPopulation collected in the southern Willamette Valley, OR (OR-SWV). Vines grown in soil infested initially with ~1.0 M. xenoplax g⁻¹ soil. Population densities estimated from a 250-g sample of soil from each pot 32 wk after infesting the soil with nematodes.
^cMeans followed by different letters are significantly different according to Fisher’s protected LSD.
Trial 1
420A Mgt	0.1 a^c	7.0 a
101-14 Mgt	2.3 a	320 a
5C	15.4 b	2014 ab
SO4	18.6 b	2076 ab
5BB Kober	20.7 b	2054 ab
Pinot gris	21.2 b	5555 bc
Riparia Gloire	23.7 b	2619 ab
Riesling	34.6 c	13252 e
St. George	35.4 c	7917 cd
3309C	35.4 c	10613 de
Chardonnay	49.6 d	11202 e
Pinot noir	52.5 d	10969 de
Trial 2
420A Mgt	0.4 a	552 a
110R	1.2 a	548 a
101-14 Mgt	2.0 a	672 a
Schwarzmann	6.9 ab	1195 a
140Ru	7.3 ab	1286 a
99R	7.9 ab	2902 ab
Pinot noir	9.0 ab	9074 d
5BB Kober	9.1 ab	7259 cd
8B Teleki	13.6 bc	3898 abc
3309C	15.0 bc	5973 bcd
Gravesac	15.5 bc	5973 bcd
Chardonnay	18.4 c	7693 d
1103P	20.0 c	3069 ab