LIBRO-CONGRESO-CITRUS

S18
S18P08
Agronomic performance of ‘Nules’ clementine and ‘Navelate’ orange on citrus rootstocks ‘F-A 5’,
‘F-A 13’ and ‘F-A 418’ in Northeastern Spain
Fibla J.M. 1 , Pastor J. 1 , Martinez-Ferrer M.T. 1 , Campos Rivela J.M. 1 , Forner-Giner M.A. 2 and Forner J.B. 2
1 Institut de Recerca i Tecnologia Agroalimentàries (IRTA), Fruit Production, Spain; and 2 Instituto Valenciano de Investigaciones Agrarias
(IVIA), Centro de Citricultura y Producción Vegetal, Spain. teresa.martinez@irta.cat
The agronomic performance in northeastern Spain (Tarragona) of three new rootstocks reducing canopy
volume ‘Forner Alcaide 5’ (F-A 5), ‘Forner Alcaide 13’ (F-A 13) [hybrids of ‘Cleopatra’ mandarin (Citrus reshni)
and Poncirus trifoliata] and ‘Forner Alcaide 418’ (F-A 418) [hybrid of ‘Troyer’ citrange (Citrus sinensis X P.
trifoliata) x common mandarin (Citrus deliciosa] was studied. In May 2000, trees were planted including
‘Carrizo’ citrange as a standard. Rootstocks were grafted with ‘Nules’ clementine (Citrus clementina) and
‘Navelate’ orange (C. sinensis). Vegetative growth, yield and fruit quality was determined from 2004 until
2012. In ‘Nules’ clementine, F-A 5 rootstock did not reduce tree growth. Yield and canopy volume were
higher than with the other rootstocks. Trees on F-A 13 had a similar growth and yield than ‘Carrizo’ citrange,
and F-A 418 induced a dwarfing effect and both growth and yield were lower than in the other rootstocks.
F-A 5 showed a ‘Navelate’ growth and yield performance similar to ‘Carrizo’ citrange, and both were higher
than the other two rootstocks tested. ‘Navelate’ trees on F-A 13 showed an intermediate response between
F-A 5 and F-A 418. The latter induced a significant reduction in size and deficient vegetation. At harvest, no
significant differences on fruit quality were found between rootstocks. However in trees on ‘Carrizo’ citrange
rootstocks, a delay in the peel-colour index was found respect to F-A 5.
S18P09
New rootstocks for the high density plantings in citrus
Bordas M. 1 , Torrents J. 1 and Forner-Giner M.A. 2
1 Agromillora Research S.L. El Rebato s/n. 08739 Subirats (Barcelona)-Spain; and 2 Instituto Valenciano de Investigaciones Agrarias
(IVIA), Centro de Citricultura y Producción Vegetal, Spain. mbordas@agromillora.com
The general trend in fruit crops is the use of dwarfing/semi-dwarfing rootstocks to control vigour, allowing
higher planting densities, enabling earlier production and increasing productivity per unit land area. The future
development of the citrus industry is betting on the incorporation of dwarfing rootstocks, which offer alternative
systems of production. In 2006, Agromillora and IVIA began a cooperative program with the aim to reduce size
and to find suitable candidates for higher density system plantings. All the rootstocks included in this program
are monoembryonic or seedless. Thus, micropropagation allows new options to produce new rootstocks that
are difficult or impossible to propagate by traditional techniques, and to make plants available quickly. 35 hybrids
between different parental species are being evaluated. We are testing for the tolerance/resistance to CTV, iron
chlorosis, salinity, water stress and flooding. As a result of this research and preliminary field results, we selected
4 dwarfing/ semidwarfing rootstocks, three hybrids ‘Cleopatra’ mandarin x Poncirus trifoliata (‘CIVAC03013’,
‘CIVAC03014’, ‘CIVAC030119’) and one hybrid ‘King’ mandarin x P. trifoliata (‘CIVAC050122’), all tolerant to
CTV. ‘CIVAC03014’ stands out for its high resistance to salinity and water stress tolerance; ‘CIVAC050122’ for
resistance to iron chlorosis. These materials are being micropropagated for the establishment of experimental
plots. It is intended to test their adaptation to a higher density production system and determine the most
appropriate management for total mechanization using commercial scion varieties for the citrus industry.
S18P10
Performance of ‘Nules’ clementine grafted on twelve rootstocks in ANECOOP
del Pino A. 1 , Martínez M. 1 and Forner-Giner M.A. 2
1 ANECOOP, Spain; and 2 Instituto Valenciano de Investigaciones Agrarias (IVIA), Departamento de Citricultura y Producción Vegetal,
Spain. adelpino@anecoop.com
The aim of this trial was to study the performance of ‘Clemenules’ mandarin (Citrus clementina) on twelve
rootstocks: ‘Carrizo’ and ‘C-35’ citranges [Citrus sinensis x Poncirus trifoliata], ‘Cleopatra’ mandarin (Citrus
330 - VALENCIA CONFERENCE CENTER, 18th-23rd NOVEMBER 2012