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Avocado rootstock named `Merensky 1`

a rootstock and avocado technology, applied in the field of new and distinct varieties of avocado rootstocks, can solve the problems of loss to mankind, noticeable differences in the health of trees,

Active Publication Date: 2007-08-28
WESTFALIA TECHNOLOGICAL SERVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of clonal rootstocks (such as ‘Duke 7’, introduced to South Africa in 1978 from California) had not yet made much impact and there were very noticeable tree health differences between individual avocado trees at Wesfalia Estate at that time.
Had the variety not been discovered and carefully preserved, it could have been lost to mankind.

Method used

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  • Avocado rootstock named `Merensky 1`
  • Avocado rootstock named `Merensky 1`
  • Avocado rootstock named `Merensky 1`

Examples

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Embodiment Construction

[0012]In those instances where precise color assessment can be made, references are to The Royal Horticultural Society (R.H.S.) Colour Chart. In other instances, generally, color terms are used in accordance with an ordinary dictionary significance. The instance cultivar ‘Merensky 1’ is described as a plant as a whole in the following description, with the exception as a rootstock for a specific scion when reference is made to root rot resistance and salinity tolerance. The following description is taken from a three-year old topworked tree located at Westfalia Estate, Waterval section, South Africa. Reference to other varieties, and particularly the ‘Merensky 2’ (U.S. Plant Pat. No. 15,309 P3) is for comparative purposes of a topworked tree of approximately the same age.[0013]Cultural conditions: Westfalia Estate, Waterval section, is situated in north-eastern South Africa (latitude 23.45 S, longitude 30.05 E, altitude 750 m above sea level). The soil type is a fine-loamy, mixed pa...

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Abstract

A new and distinct variety of Persea americana tree having strong resistance to Phytophthora cinnamomi and tolerance to salinity, and used as a rootstock.

Description

DESCRIPTION[0001]Botanical / Commercial classification: Persea americana Mill. / Avocado Tree.[0002]Varietal denomination: ‘Merensky 1’.SUMMARY OF THE INVENTION[0003]This invention relates to a new and distinct variety of an avocado rootstock that is known by the varietal name ‘Merensky 1’.[0004]In the 1970's and early 1980's widespread outbreaks of Phytophthora cinnamomi root rot (P.c.) had devastating effects on most avocado trees grown at Westfalia Estate. The use of clonal rootstocks (such as ‘Duke 7’, introduced to South Africa in 1978 from California) had not yet made much impact and there were very noticeable tree health differences between individual avocado trees at Wesfalia Estate at that time. Fungicides, effective against P.c. were not available. In this period, i.e. in the late 1970's and early 1980's, a healthy seedling avocado tree was selected at Westfalia Estate where it was growing in waterlogged conditions. The parentage of this healthy seedling avocado tree is unknow...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): A01H5/00A01H5/08
CPCA01H5/0818A01H5/08A01H6/52
Inventor DARVAS, JOZSEF
Owner WESTFALIA TECHNOLOGICAL SERVICES
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