Grape Rootstocks

Are used when the roots of the fruiting grape variety are not adapted to the conditions of the soil in the vineyard

Phylloxera-Resistant Rootstock Varieties

vigorous vines

drought-tolerant

roots well, easily budded and grafted

flat petiolar sinus, glabrous

produces male flowers

is a hybrid between Vitis vinifera and V. rupestris

produces high yields of high quality fruit

roots, grafts, and buds easily

the most widely used rootstock in California

is resistant to biotype A phylloxera

is highly susceptible to biotype B phylloxera

leaves are glabrous

produces male flowers

illegal in France

is a hybrid between V. riparia & V. rupestris

is widely used in France

upper leaf surface is glabrous

lower leaf surface is glabrous except at junction of large veins produces male flowers

is a hybrid between V. berlandieri & V. riparia of Teleki

is widely used in Europe

is being planted extensively in California

produces male flowers

is a sister selection of SO4.

has been called SO4 in California for many years

is being planted extensively in California

is a hybrid between V. vinifera Almeria & M. rotundifolia

produced by the University of California

is patented

is being planted widely is California

is sterile

is a hybrid between V. berlandieri & V. rupestris

widely used in Europe

gaining popularity in California

easy to root, graft & bud

tolerant to limestone soils

produces mail flowers

 

Nematode-Resistant Rootstock Varieties

is a selection from the wild of V. champini

is very vigorous (scion)

produces zinc deficiency (scion)

root with difficulty

easy to bud and graft

produces female flowers and small clusters of fruit

leaves are pubescent on upper & lower surfaces

is a hybrid between 1613 (some V. vinifera blood) & Dogridge

developed by the USDA on the CSUFresno farm

easy to root, graft, & bud

produces large yields of fruit (scion)

excellent for raisin and table grapes (scion)

produces female flowers and small bunches of grapes

leaves are pubescent on upper & lower surfaces

illegal in France

is a sister selection of Freedom (same parents)

scion on Harmony not as vigorous or as high yielding as when on Freedom

easy to root, graft & bud

leaves are pubescent on upper & lower surfaces

illegal in France