University of California
Fruit Report
Rootstocks
Rootstock Details by Fruit Ripening : Delayed
Paramount
Other Names
GF 677
Species
Prunus dulcis x Prunus persica
Origin
Introduced in France by INRA
Vigor
Very vigorous
Vigor Explanation
Waterlogging Tolerance
Poor
Waterlogging Explanation
Calcareous Soil Tolerance
Good
Compatibility with Peach and Nectarine
Good
Compatibility with Plum
Unknown
Suckering
Little or none
Explanations for calcareous soil tolerance - compatiblities - suckering
Showed better tolerance of calcareous soils (no iron chlorosis) than many other rootstocks tested (Acta Hort article)
Drought Tolerance
Good
Anchorage
Good
Precocity
Delayed Precocity
Fruit Ripening
Delayed
Flower Timing
Unknown
Flower Density
Unknown
Cold Hardiness
No
Rootknot Nematode
Susceptible
Lesion Nematode
Partly resistant
Ring Nematode
Susceptible
Nematode Explanations
Bacterial Canker
Phytophthora
Susceptible
Armillaria
Susceptible
Crown Gall
Susceptible
Disease Explanations
Also reported to be susceptible to silver leaf disease and somewhat to verticillium wilt
Other Diseases
Availability from Nurseries
Propagation Methods
Can be propagated by softwood and hardwood cuttings. Now mostly propagated by micropropagation.
Summary Comments
Has been widely used in Europe because of its tolerance to calcareous soils. However, it has many drawbacks including susceptibility to most soil pests and diseases and it does not tolerate waterlogged soils.
References
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