STUDIES ON THE VEGETATIVE PROPAGATION OF RUBIRA, A ROOTSTOCK OF PEACH [Prunus persica (L.) Batsch]
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Date
2019-09
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UHF,NAUNI
Abstract
ABSTRACT
The present study entitled, “Studieson the vegetative propagation of Rubira, a rootstock of peach
[Prunus persica (L.) Batsch]” was carried out during 2017-2018 in the nursery area of the Department
of Fruit Science, Dr Y. S. Parmar University of Horticulture and Forestry at Nauni, Solan (H P). Two
experiments were laid out to study the effect of different IBA concentrations and growing media on rooting of
mound layers and to assess the effect of auxin and pre-conditioning treatments on rooting in hardwood cuttings
ofrubira rootstock. The experiment one consists of fifteen treatments of rooting media and IBA concentrations,
and each treatment was replicated thrice in a randomized block design. The stool shoots of rootstock were
treated with 2000 and 3000 ppm IBA and then mounded up with Cocopeat, Sawdust, Soil, Vermicompost,
Sawdust + Cocopeat (1:1), Soil + Cocopeat (1:1), Vermicompost + Cocopeat (1:1) media. The results revealed
that treatment of stool shoots with 3000 ppm IBA and mounding up of stools with vermicompost + cocopeat
(1:1) media resulted in highest rooting (91.72 %), number of adventitious roots (16.00), total root length (10.50
m) and diameter (7.74 mm), and shoot length and diameter. In second experiment, the pre-conditioning
treatments with girdling and blanching were given to the shoots and then the cuttings taken from the shoots were
treated with 1000, 2000, 3000, 4000 ppm IBA and 500, 1000 and 1500 ppm NAA and planted in polyhouse for
rooting. The experiment was laid out in a completely randomized design and each treatment was replicated
thrice. The result showed that the IBA 3000 ppm + girdling resulted in maximum rooting (64.10%), highest
number (18.00), length (25.16 m) and diameter (34.35 mm) of primary roots, and shoot growth. From the
present study it is inferred that treatment of stool shoots with 3000 ppm IBA and mounding of shoots with
vermicompost + cocopeat media gave highest rooting of 91.72 per cent with better root length, root diameter,
number of adventitious roots and growth of shoots. The results on the propagation of rootstock through
hardwood cuttings revealed that pre-conditioning treatment of shoots with girdling followed by dipping of
cuttings in 3000 IBA ppmgave highest rooting (64.10 %) with better root length, root diameter and shoot length
and these methods can be used for commercial multiplication of difficult to root peach rootstock Rubira.
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