Abstract
Abstract: The objective of this work was to evaluate the effect of nine rootstocks on 'Jaffa' sweet orange (Citrus sinensis) for its vegetative, productive, and qualitative traits, and for its susceptibility to three pest mites (Eutetranychus banksi, Tetranychus mexicanus and Phyllocoptruta oleivora). The following parameters were evaluated: vegetative growth, yield, physiochemical characteristics of fruit, and density of pest mites. 'Sunki Tropical' mandarin conferred high cumulative yields whereas 'Orlando' tangelo and 'Rugoso Vermelho' lemon imparted bigger fruit with low brix, and less acidity to 'Jaffa'. Indio and 'Riverside' citrandarins induced more acid fruit of smaller sizes, as well as low-cumulated yields and canopy volumes. Also, the 'Cravo Santa Cruz' lime, 'San Diego' citrandarin, and the hybrids HTR-051 and LVK x LCR-010 conferred lower-cumulated yields to 'Jaffa'. The rootstocks did not influence the population levels of the evaluated mites. 'Sunki Tropical' mandarin, 'Cravo Santa Cruz' lime and 'Rugoso Vermelho' lemon stand up as excellent rootstock options for 'Jaffa' sweet orange in the Northeastern Brazil.
Highlights
Brazil ranks first in the production of sweet orange in the world, and Brazilian Southeast and Northeast are the main producing regions (IBGE, 2016)
The experiment consisted of 'Jaffa' sweet orange grafted on nine rootstocks, as follows: 'Cravo Santa Cruz' lime, 'Rugoso Vermelho' lemon (C. jambhiri Lush.), 'Orlando' tangelo (C. paradisi Macfad. x C. tangerina hort. ex Tanaka), 'Sunki Tropical' mandarin [C. sunki (Hayata) hort. ex Tanaka], 'Indio, 'Riverside', and 'San Diego' citrandarins [C. sunki x Poncirus trifoliata (L.) Raf.]), and the hybrids HTR-051 and LVK x LCR-010 [C. volkameriana V
Rootstocks did not affect the yield efficiency which considers the yield per volume of canopy
Summary
Brazil ranks first in the production of sweet orange in the world, and Brazilian Southeast and Northeast are the main producing regions (IBGE, 2016). In Northeastern Brazil, the majority of orchards cultivate 'Pera' sweet orange [Citrus sinensis (L.) Osbeck] grafted on 'Rangpur' lime (C. limonia Osbeck) because of fruit with good quality and drought tolerance imparted from the rootstock (Almeida & Passos, 2011). Such a narrow genetic diversity could lead to losses caused by biotic and abiotic stresses, threatening the whole citrus chain in this region (Carvalho et al, 2019). It is characterized by medium-sized plants, with open branches, satisfactory yields, tendency to production alternation, precocious maturation, and fruit suited for both in natura consumption and juice production (Bacar et al, 2017)
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