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2020
Ferreira, Leticia M.; Nunes, Maria A.; Sinico, Thaís E.; Soares, Alex J.; Novelli, Valdenice M.
Brevipalpus Species Vectoring Citrus Leprosis Virus (Cilevirus and Dichorhavirus) Journal Article
In: Journal of Economic Entomology, vol. 113, iss. 4, pp. 1628-1634, 2020, ISSN: 0022-0493.
Abstract | Links | BibTeX | Tags: citriculture, citrus leprosis disease, false spider mites, pest management
@article{Ferreira2020,
title = {Brevipalpus Species Vectoring Citrus Leprosis Virus (Cilevirus and Dichorhavirus)},
author = {Leticia M. Ferreira and Maria A. Nunes and Thaís E. Sinico and Alex J. Soares and Valdenice M. Novelli},
url = {https://academic.oup.com/jee/article/113/4/1628/5824968},
doi = {10.1093/JEE/TOAA070},
issn = {0022-0493},
year = {2020},
date = {2020-01-01},
journal = {Journal of Economic Entomology},
volume = {113},
issue = {4},
pages = {1628-1634},
publisher = {Oxford Academic},
abstract = {Citrus leprosis (CL) is one of the most devastating viral diseases of orchards, and industries correspondingly invest highly in the management and control of the virus vector. In Brazil, the disease is caused most predominantly by the citrus leprosis virus C (CiLV-C, Kitaviridae: Cilevirus), and also by citrus leprosis virus N (CiLV-N, Rhabdoviridae: Dichorhavirus). Both viruses are transmitted by false spider mites and at least three different species, Brevipalpus yothersi Baker, B. papayensis Baker, and B. phoenicis (Geijskes) sensu stricto, have been reported in citrus orchards. The main goal of this study was to evaluate the capacity of three Brevipalpus species to transmit citrus leprosis virus (cytoplasmic and nuclear types). The capacity of false spider mites to acquire the virus was accomplished using RT-PCR and the ability to inoculation the virus to host plants (common bean and sweet orange) was assessed via viral transmission assays. Common beans infested with B. yothersi and B. papayensis showed symptoms of CiLV-C in 87.5 and 17% of the plants assessed, respectively. In sweet orange, B. yothersi was exclusively able to inoculate CiLV-C, and around 83% of samples were symptomatic. Host plants infected with CiLV-N showed symptoms only when infested with B. phoenicis sensu stricto (s.s.). All the Brevipalpus species (Acari: Tenuipalpidae) were able to acquire both viruses (CiLV-C and CiLV-N), but not infect plants. These results suggest the existence of virus-vector specificity in the leprosis pathosystem, and this information will be critical for enhancing our further understanding of epidemiological features and disease management.},
keywords = {citriculture, citrus leprosis disease, false spider mites, pest management},
pubstate = {published},
tppubtype = {article}
}
Citrus leprosis (CL) is one of the most devastating viral diseases of orchards, and industries correspondingly invest highly in the management and control of the virus vector. In Brazil, the disease is caused most predominantly by the citrus leprosis virus C (CiLV-C, Kitaviridae: Cilevirus), and also by citrus leprosis virus N (CiLV-N, Rhabdoviridae: Dichorhavirus). Both viruses are transmitted by false spider mites and at least three different species, Brevipalpus yothersi Baker, B. papayensis Baker, and B. phoenicis (Geijskes) sensu stricto, have been reported in citrus orchards. The main goal of this study was to evaluate the capacity of three Brevipalpus species to transmit citrus leprosis virus (cytoplasmic and nuclear types). The capacity of false spider mites to acquire the virus was accomplished using RT-PCR and the ability to inoculation the virus to host plants (common bean and sweet orange) was assessed via viral transmission assays. Common beans infested with B. yothersi and B. papayensis showed symptoms of CiLV-C in 87.5 and 17% of the plants assessed, respectively. In sweet orange, B. yothersi was exclusively able to inoculate CiLV-C, and around 83% of samples were symptomatic. Host plants infected with CiLV-N showed symptoms only when infested with B. phoenicis sensu stricto (s.s.). All the Brevipalpus species (Acari: Tenuipalpidae) were able to acquire both viruses (CiLV-C and CiLV-N), but not infect plants. These results suggest the existence of virus-vector specificity in the leprosis pathosystem, and this information will be critical for enhancing our further understanding of epidemiological features and disease management.
Meneses, Thaís N.; Filho, Mauricio A. Coelho; Filho, Hermes P. Santos; de A. Dos Santos, Luana L.; Gesteira, Abelmon S.; Filho, Walter Dos S. Soares
Rootstocks and planting types on root architecture and vegetative vigor of ‘Pera’ sweet orange trees Journal Article
In: Revista Brasileira de Engenharia Agrícola e Ambiental, vol. 24, iss. 10, pp. 685-693, 2020, ISSN: 1415-4366.
Abstract | Links | BibTeX | Tags: citriculture, cohesive soil, Drought tolerance, root
@article{Meneses2020,
title = {Rootstocks and planting types on root architecture and vegetative vigor of ‘Pera’ sweet orange trees},
author = {Thaís N. Meneses and Mauricio A. Coelho Filho and Hermes P. Santos Filho and Luana L. de A. Dos Santos and Abelmon S. Gesteira and Walter Dos S. Soares Filho},
url = {http://www.scielo.br/j/rbeaa/a/dFHKYJKmBXFkz7SSRBzcp5x/?lang=en},
doi = {10.1590/1807-1929/AGRIAMBI.V24N10P685-693},
issn = {1415-4366},
year = {2020},
date = {2020-01-01},
journal = {Revista Brasileira de Engenharia Agrícola e Ambiental},
volume = {24},
issue = {10},
pages = {685-693},
publisher = {Departamento de Engenharia Agrícola - UFCG},
abstract = {ABSTRACT Root architecture affects plant growth and agricultural productions. Although it is related to genetic factors, soil physical limitations can affect the root system and volume of explored soil, compromising plant growth and fruit production. Considering the need to mitigate these restrictions, the objective of the present study was to evaluate two planting types (planting of protected seedlings and planting of seeds in definitive place) and two scion-rootstock combinations (‘Pera’ sweet orange, CNPMF D-6 selection, combined with ‘Santa Cruz Rangpur’ lime and ‘Sunki Tropical’ mandarin rootstocks). The experiment was conducted at the Lagoa do Coco Farm, Rio Real, BA, Brazil, in a Oxisol under rainfed conditions. Biometric, physiological, and soil water content evaluations were made during the experiment. Soil mechanical resistance to root penetration and root system characteristics were also evaluated. Roots were concentrated on the soil surface layers (0-0.40 m), extending horizontally up to 1.50 m from the plant, regardless of the management practices used. The total root length in each root diameter classes studied, root length density, and total root mean diameter were higher for planting of protected seedling, resulting in greater root development. Plants from ‘Pera’ sweet orange scion grafted on ‘Santa Cruz Rangpur’ lime rootstock had earlier production and were more vigorous. Soil structure affects root growth, and the root distribution up to 0.40 m depth is correlated with plant vigor, yield, and water status under rainfed conditions.},
keywords = {citriculture, cohesive soil, Drought tolerance, root},
pubstate = {published},
tppubtype = {article}
}
ABSTRACT Root architecture affects plant growth and agricultural productions. Although it is related to genetic factors, soil physical limitations can affect the root system and volume of explored soil, compromising plant growth and fruit production. Considering the need to mitigate these restrictions, the objective of the present study was to evaluate two planting types (planting of protected seedlings and planting of seeds in definitive place) and two scion-rootstock combinations (‘Pera’ sweet orange, CNPMF D-6 selection, combined with ‘Santa Cruz Rangpur’ lime and ‘Sunki Tropical’ mandarin rootstocks). The experiment was conducted at the Lagoa do Coco Farm, Rio Real, BA, Brazil, in a Oxisol under rainfed conditions. Biometric, physiological, and soil water content evaluations were made during the experiment. Soil mechanical resistance to root penetration and root system characteristics were also evaluated. Roots were concentrated on the soil surface layers (0-0.40 m), extending horizontally up to 1.50 m from the plant, regardless of the management practices used. The total root length in each root diameter classes studied, root length density, and total root mean diameter were higher for planting of protected seedling, resulting in greater root development. Plants from ‘Pera’ sweet orange scion grafted on ‘Santa Cruz Rangpur’ lime rootstock had earlier production and were more vigorous. Soil structure affects root growth, and the root distribution up to 0.40 m depth is correlated with plant vigor, yield, and water status under rainfed conditions.
2019
Conceição, Patrícia Marluci; Azevedo, Fernando Alves; Ecker, Gerhard Vitor; Morelli, Marilia; Cristofani-Yaly, Mariangela
Physiological quality of citrandarins, Poncirus trifoliata and Sunki mandarin seeds Journal Article
In: Comunicata Scientiae, vol. 10, iss. 4, pp. 461-466, 2019, ISSN: 2177-5133.
Abstract | Links | BibTeX | Tags: citriculture, Emergency, Germination, rootstock, Storage
@article{nokey,
title = {Physiological quality of citrandarins, Poncirus trifoliata and Sunki mandarin seeds},
author = {Patrícia Marluci Conceição and Fernando Alves Azevedo and Gerhard Vitor Ecker and Marilia Morelli and Mariangela Cristofani-Yaly},
url = {https://www.comunicatascientiae.com.br/comunicata/article/view/3138},
doi = {10.14295/CS.V10I4.3138},
issn = {2177-5133},
year = {2019},
date = {2019-01-01},
journal = {Comunicata Scientiae},
volume = {10},
issue = {4},
pages = {461-466},
publisher = {Federal University ofPiauI},
abstract = {Rangpur lime is the rootstock most used in Brazil, mainly due to its resistance to drought; however, it is susceptible to several diseases, requiring the search for other rootstocks tolerant to factors limiting citrus cultivation. In addition, the Brazilian legislation stipulates that citrus seeds can only be commercialized with at least 50% germination rate. Thus, the aim of this work was to evaluate the physiological quality of seeds of seven citrus rootstocks. The following citrus fruits were harvested: Poncirus trifoliata, Sunki mandarin and their hybrids –citrandarins (70, 106, 254, 299 and 310). Fruit mass, diameter and height were measured. Seeds were extracted from fruits, counting the number of normal seeds (not aborted). Seeds were dried up to 20% water content and stored for 3, 6, 9 and 12 months. The physiological quality of seeds was evaluated before storage (time 0) up to 12 months of storage. The quality of Poncirus trifoliata, Sunki mandarin and citrandarins 70, 106, 254, 299 and 310 seeds was reduced during storage. However, their germination rate remained above 50%, evidencing that seeds of all rootstocks could be marketed until 12 months of storage. The new rootstocks tested have seeds with physiological quality compatible with their parents, in compliance with current legislation.},
keywords = {citriculture, Emergency, Germination, rootstock, Storage},
pubstate = {published},
tppubtype = {article}
}
Rangpur lime is the rootstock most used in Brazil, mainly due to its resistance to drought; however, it is susceptible to several diseases, requiring the search for other rootstocks tolerant to factors limiting citrus cultivation. In addition, the Brazilian legislation stipulates that citrus seeds can only be commercialized with at least 50% germination rate. Thus, the aim of this work was to evaluate the physiological quality of seeds of seven citrus rootstocks. The following citrus fruits were harvested: Poncirus trifoliata, Sunki mandarin and their hybrids –citrandarins (70, 106, 254, 299 and 310). Fruit mass, diameter and height were measured. Seeds were extracted from fruits, counting the number of normal seeds (not aborted). Seeds were dried up to 20% water content and stored for 3, 6, 9 and 12 months. The physiological quality of seeds was evaluated before storage (time 0) up to 12 months of storage. The quality of Poncirus trifoliata, Sunki mandarin and citrandarins 70, 106, 254, 299 and 310 seeds was reduced during storage. However, their germination rate remained above 50%, evidencing that seeds of all rootstocks could be marketed until 12 months of storage. The new rootstocks tested have seeds with physiological quality compatible with their parents, in compliance with current legislation.
Conceição, Patrícia Marluci; Azevedo, Fernando Alves; Ecker, Gerhard Vitor; Morelli, Marilia; Cristofani-Yaly, Mariangela
Physiological quality of citrandarins, Poncirus trifoliata and Sunki mandarin seeds Journal Article
In: Comunicata Scientiae, vol. 10, iss. 4, pp. 461-466, 2019, ISSN: 2177-5133.
Abstract | Links | BibTeX | Tags: citriculture, Emergency, Germination, rootstock, Storage
@article{nokey,
title = {Physiological quality of citrandarins, Poncirus trifoliata and Sunki mandarin seeds},
author = {Patrícia Marluci Conceição and Fernando Alves Azevedo and Gerhard Vitor Ecker and Marilia Morelli and Mariangela Cristofani-Yaly},
url = {https://www.comunicatascientiae.com.br/comunicata/article/view/3138},
doi = {10.14295/CS.V10I4.3138},
issn = {2177-5133},
year = {2019},
date = {2019-01-01},
journal = {Comunicata Scientiae},
volume = {10},
issue = {4},
pages = {461-466},
publisher = {Federal University ofPiauI},
abstract = {Rangpur lime is the rootstock most used in Brazil, mainly due to its resistance to drought; however, it is susceptible to several diseases, requiring the search for other rootstocks tolerant to factors limiting citrus cultivation. In addition, the Brazilian legislation stipulates that citrus seeds can only be commercialized with at least 50% germination rate. Thus, the aim of this work was to evaluate the physiological quality of seeds of seven citrus rootstocks. The following citrus fruits were harvested: Poncirus trifoliata, Sunki mandarin and their hybrids –citrandarins (70, 106, 254, 299 and 310). Fruit mass, diameter and height were measured. Seeds were extracted from fruits, counting the number of normal seeds (not aborted). Seeds were dried up to 20% water content and stored for 3, 6, 9 and 12 months. The physiological quality of seeds was evaluated before storage (time 0) up to 12 months of storage. The quality of Poncirus trifoliata, Sunki mandarin and citrandarins 70, 106, 254, 299 and 310 seeds was reduced during storage. However, their germination rate remained above 50%, evidencing that seeds of all rootstocks could be marketed until 12 months of storage. The new rootstocks tested have seeds with physiological quality compatible with their parents, in compliance with current legislation.},
keywords = {citriculture, Emergency, Germination, rootstock, Storage},
pubstate = {published},
tppubtype = {article}
}
Rangpur lime is the rootstock most used in Brazil, mainly due to its resistance to drought; however, it is susceptible to several diseases, requiring the search for other rootstocks tolerant to factors limiting citrus cultivation. In addition, the Brazilian legislation stipulates that citrus seeds can only be commercialized with at least 50% germination rate. Thus, the aim of this work was to evaluate the physiological quality of seeds of seven citrus rootstocks. The following citrus fruits were harvested: Poncirus trifoliata, Sunki mandarin and their hybrids –citrandarins (70, 106, 254, 299 and 310). Fruit mass, diameter and height were measured. Seeds were extracted from fruits, counting the number of normal seeds (not aborted). Seeds were dried up to 20% water content and stored for 3, 6, 9 and 12 months. The physiological quality of seeds was evaluated before storage (time 0) up to 12 months of storage. The quality of Poncirus trifoliata, Sunki mandarin and citrandarins 70, 106, 254, 299 and 310 seeds was reduced during storage. However, their germination rate remained above 50%, evidencing that seeds of all rootstocks could be marketed until 12 months of storage. The new rootstocks tested have seeds with physiological quality compatible with their parents, in compliance with current legislation.
2018
Hippler, Franz Walter Rieger; Boaretto, Rodrigo Marcelli; Teixeira, Luiz Antonio Junqueira; Quaggio, José Antonio; Mattos-Jr, Dirceu
Copper supply and fruit yield of young Citrus trees: fertiliser sources and application methods Journal Article
In: Bragantia, vol. 77, iss. 2, pp. 365-371, 2018, ISSN: 0006-8705.
Abstract | Links | BibTeX | Tags: citriculture, fertigation, foliar application, micronutrient, nutritional status
@article{Hippler2018d,
title = {Copper supply and fruit yield of young Citrus trees: fertiliser sources and application methods},
author = {Franz Walter Rieger Hippler and Rodrigo Marcelli Boaretto and Luiz Antonio Junqueira Teixeira and José Antonio Quaggio and Dirceu Mattos-Jr},
url = {http://www.scielo.br/j/brag/a/r5Jvpx8Ny4z7zr5VYZN5mMq/?lang=en},
doi = {10.1590/1678-4499.2017125},
issn = {0006-8705},
year = {2018},
date = {2018-01-01},
journal = {Bragantia},
volume = {77},
issue = {2},
pages = {365-371},
publisher = {Instituto Agronômico de Campinas},
abstract = {ABSTRACT This study aimed to evaluate the fertiliser sources and application methods of copper (Cu) in citrus trees during the first years of fruit production. Two experiments were set up in an orchard with 3-year-old sweet orange trees, which were applied with three sources of Cu (nitrate, sulfate or EDTA) either via fertigation (Experiment 1) or via foliar sprays (Experiment 2). Regardless of the fertiliser source, Cu application via fertigation was not efficacious to increase the micronutrient concentration in leaves and, consequently, did not affect fruit yield. Conversely, foliar application of Cu, either as nitrate or sulfate, increased this nutrient level in leaves but when applied as copper nitrate, visual phytotoxicity symptoms were verified in leaves due to salt accumulation in the plant canopy, which reduced the fruit yield. Considering the plant growth and intensified phytosanitary management of the orchard with the application of copperbased products after the third year of the experiment, the effects of Cu treatments on fruit yield are expected to be negligible as the trees age.},
keywords = {citriculture, fertigation, foliar application, micronutrient, nutritional status},
pubstate = {published},
tppubtype = {article}
}
ABSTRACT This study aimed to evaluate the fertiliser sources and application methods of copper (Cu) in citrus trees during the first years of fruit production. Two experiments were set up in an orchard with 3-year-old sweet orange trees, which were applied with three sources of Cu (nitrate, sulfate or EDTA) either via fertigation (Experiment 1) or via foliar sprays (Experiment 2). Regardless of the fertiliser source, Cu application via fertigation was not efficacious to increase the micronutrient concentration in leaves and, consequently, did not affect fruit yield. Conversely, foliar application of Cu, either as nitrate or sulfate, increased this nutrient level in leaves but when applied as copper nitrate, visual phytotoxicity symptoms were verified in leaves due to salt accumulation in the plant canopy, which reduced the fruit yield. Considering the plant growth and intensified phytosanitary management of the orchard with the application of copperbased products after the third year of the experiment, the effects of Cu treatments on fruit yield are expected to be negligible as the trees age.