Univiveros® also acquires rootstocks in nurseries specialized in the production of seeds and/or seedlings:

The varieties come from mother blocks for buds formed from imported quarantine materials (controlled and tested by the SAG) and increase blocks with SAG (Agriculture and Livestock Service) certification, evaluated for their health and managed for the purpose of:

• providing genetic security, by means of observation and classification of the fruit from each one of the mother trees in order to allow its use as a reliable source of plant material.
• providing quality propagation material by managing fertilization and plant health, accordingly.

Plant materials are also obtained from commercial orchards formed from imported materials for quarantine, and evaluated during successive seasons in their genetic and health aspects.

Originally from Germany, the GiSelA®5, GiSelA®12, and the GiSelA®6 have been created from this Hybrid.

They provide quick spur formation, strong flower bud formation that increase the chance of fruit set, inducing high precocity. They produce open angles and strongly reduce the final size of the tree in relation to Mericier. GiSelA®5 reduces vigor to 50%, GiSelA® 12 to 60% and GiSelA®6 to 70%.

Recommended for varieties that don’t produce much fruit, like Bing and Korida and not recommended for highly productive varieties like Van or Lapins. They adapt to a wide range of soils.

American origin, has good adaptability to different soil types (except very heavy soil with drainage problems or very thin soil).

It has good compatibility with many varieties. It is a polyfunctional rootstock that can be used with a wide range of varieties.

English origin. Gives the variety a vigor of nearly 80% with respect to Mericier. It is recommended for varieties of medium-high fruit set and produces a fairly balanced tree.

It adapts well to heavy soils and in soils with drainage problems. At the same time it is not suitable for shallow soils or soils with low water supply. High susceptibility to gall (Agrobacterium tumefaciens).

Within this group, Univiveros® offers two rootstocks of French origin:

– Saint Lucia 64 or better known as SL64 (clonal): Provides homogeneity to the mother block, rootstock which provides the variety which vigor of nearly 80% with respect to Mericier.

– Pontaleb, diminishes the vigor of the variety by 10 to 20% with respect to SL64.

Both are well adapted to thin soils, they are susceptible to Phytophthora and to root suffocation, and do not tolerate heavy soils with drainage problems.

They have some resistance to calcareous soils and cope quite well with the stress of hot summers.

Italian origin; it is a semi-dwarfing rootstock with a vigor of nearly 70% with respect to generic. It has good rooting capacity, is compatible with many varieties and tends to issue shoots.

It shows some tolerance to heavy soils, some resistance to calcareous soil, and sensitivity to water stress. Confers greater precociousness in entry into production than Colt and improves the fruit size.

We are convinced that the uniformity of orchards starts with planting a homogeneous population of plants.

For this reason, Univiveros® has adopted a system of segregation based on measuring the size of the plants, five centimeters above the growth of the variety or immediately below the graft of dormant budded plants. These sizes are classified as follows:

Variety developed for an entire season in a nursery on two year old rootstock.

Plant with large root mass and reserve. These are delivered in the months of June – August.

Variety grafted with two buds on one year old rootstock, which sprout in the orchard in spring and then grow with vigor and balance. Delivery in July-August.

Plant which rootstock has been grown in a 3.0 liter bag for a season. The rootstock is grafted in winter and is delivered once the variety has grown 40-60 cm.

This growth is achieved between the months of October and early November. These plants take 100% of their roots with them and the variety growing on each of them, which produces very homogeneous orchards.

Traceability in propagation material:

There is a rigorous system of labeling and registration of propagation material that results in codes for each species, variety, and origin of each of the plants at all times.

Traceability in production process:

In addition to the care taken in regard to our sources of propagation materials, we have a rigorous system of labeling of propagating material which results in coded records of the variety’s identity and origin of each of the plants propagated throughout the production process.