Plano de ação para o controle de huanglongbing no estado do Paraná, Brasil

Nunes, William Mário de Carvalho; Souza, Elias Brasilino de; Leite, Rui Pereira; Salvador, Cayetano; Rinaldi, Daniel; Filho, J. C. Oliveira; Paiva, Patrícia Georgina Colvara

doi:10.5935/2236-3122.20100017

Cited by 10 publications

(3 citation statements)

References 2 publications

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“…Trees were monitored periodically, and cultural practices were performed according to the recommendations for the state of Paraná, including preventative copper sprays to control citrus canker ( Xanthomonas citri subsp. citri ) and monthly insecticide applications to control the Asian citrus psyllid ( Diaphorina citri Kuwayama) from 2014 up to 2016 [ Instituto Agronômico do Paraná (IAPAR), 1992 ; Nunes et al, 2010 ]. The “Emperor” mandarin trees infected by the phloem-limited bacteria “ Candidatus Liberibacter asiaticus,” pathogen of (HLB), were eliminated.…”

Section: Methodsmentioning

confidence: 99%

Five Rootstocks for “Emperor” Mandarin Under Subtropical Climate in Southern Brazil

Cruz

Neves²,

Carvalho³

et al. 2021

Front. Plant Sci.

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Rootstocks modulate several characteristics of citrus trees, including vegetative growth, fruit yield and quality, and resistance or tolerance to pests, diseases, soil drought, and salinity, among other factors. There is a shortage of scion and rootstock cultivars among the combinations planted in Brazil. “Ponkan” mandarin and “Murcott” tangor grafted on “Rangpur” lime comprise the majority of the commercial mandarin orchards in Brazil. This low genetic diversity of citrus orchards can favor pest and disease outbreaks. This study aimed to evaluate the agronomic performance, Huanglongbing (HLB) tolerance, and fruit quality of “Emperor” mandarin on five different rootstocks for nine cropping seasons under the subtropical soil-climate conditions of the North region of the state of Paraná, Brazil. The experimental design was a randomized block, with six replications, two trees per block, and five rootstocks, including “Rangpur” lime, “Cleopatra,” and “Sunki” mandarins, “Swingle” citrumelo, and “Fepagro C-13” citrange. The evaluations included tree growth, yield performance, fruit quality, and HLB disease incidence. “Emperor” mandarin trees grafted on “Rangpur” lime and “Swingle” citrumelo had early fruiting and high yield efficiency. “Rangpur” lime also induced the lowest tree growth, but low fruit quality. Trees on “Swingle” citrumelo and “Fepagro C-13” citrange showed low scion and rootstock affinity and produced fruits with high total soluble solids (TSS), with a lower number of seeds for those from trees on “Fepagro C-13” citrange. “Cleopatra” and “Sunki” mandarins induced higher juice content, while fruits from trees on “Cleopatra” also had higher TSS/titratable acidity (TA) ratio. “Emperor” mandarin trees were susceptible to HLB regardless of the rootstocks. Overall, “Cleopatra” and “Sunki” mandarins, “Swingle” citrumelo, and “Fepagro C-13” are more suitable rootstocks for “Emperor” mandarin under Brazilian subtropical conditions than “Rangpur” lime.

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Section: Methodsmentioning

confidence: 99%

Five Rootstocks for “Emperor” Mandarin Under Subtropical Climate in Southern Brazil

Cruz

Neves²,

Carvalho³

et al. 2021

Front. Plant Sci.

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“…In 2019, HLB was already present in 60 municipalities of southern Minas Gerais State and southern and southwestern Triângulo Mineiro (Instituto Mineiro de Agropecuária 2019). In Paraná State, HLB was first reported in 2007, in the municipality of Altônia in the northwest (Nunes et al 2010) and in 2019, HLB was present in 138 municipalities in the northern, northwestern, and western regions (Agência de Defesa Agropecuária do Paraná 2019). In August 2019, the disease was first reported in 16 municipalities of the State of Mato Grosso do Sul (Diário Oficial Da União 2019) ( Fig.…”

Section: Introductionmentioning

confidence: 99%

Overview of citrus huanglongbing spread and management strategies in Brazil

Bassanezi

Lopes

Miranda

et al. 2020

Trop. plant pathol.

123

136

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Huanglongbing (HLB) has been a serious threat to the citrus industry worldwide. After its first report in São Paulo State, the main citrus production area in Brazil, the disease spread to the States of Minas Gerais, Paraná and Mato Grosso do Sul. Attempts to cure plants or remiss disease symptoms and damages have been evaluated and showed to be inefficient and nonviable. The development of resistant or tolerant varieties to the bacteria or its insect vector, the Asian citrus psyllid Diaphorina citri, is still a long term challenge. Earlier HLB management has been based on preventive measures such as planting of healthy nursery trees, elimination of diseased trees, and vector control. Supported by both research data and citrus grower experiences, HLB management in São Paulo and Triângulo/Sudoeste Mineiro citrus belt has been improved from measures individually applied only into the orchards to regional disease management, including differentiated psyllid control in the orchards based on tree location and shoot flushing, area-wide coordinated control of psyllids, and removal of inoculum sources in noncommercial properties in the vicinity of commercial orchards. In addition, the negative impact of HLB on orchard production and longevity has been reduced with wide adoption of better cultural practices such as high-density planting, irrigation, and adequate nutrition. Unlike in other countries where HLB reached epidemic levels, the management of HLB in São Paulo and Triângulo/Sudoeste Mineiro citrus belt has been considered a success case and has ensured the maintenance of citrus production and competitiveness of the Brazilian citrus industry while new, more durable, and sustainable measures are not yet available.

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“…Despite the advances in orange production in Paraná, the citrus sector faces serious phytosanitary problems owing to HLB. HLB was first reported in Paraná in 2006, in the municipality of Altônia, and it spread through the North and Northwest regions (NUNES et al, 2010). The Northwest region is the most important in the Paraná citrus chain (COSTA et al, 2020); it accounts for, on average, 66% of the state's orange production, 56% of the cultivated area, and 57% of the gross fruit production value (IBGE, 2020).…”

Section: Introductionmentioning

confidence: 99%

Economic impact of Huanglongbing on orange production

et al. 2021

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Huanglongbing (HLB) is considered one of the main citrus diseases; it spreads quickly through orchards, reducing the production and quality of the fruit of affected plants, and causes significant economic losses. In this context, the aim of this study was to estimate the incidence and economic impact of the losses generated by HLB in the micro-region of Paranavaí, in the state of Paraná, Brazil. We used data from the Paraná Agribusiness Defense Agency, which conducts surveys of host plants of the causal agent of HLB. The production sacrificed by HLB was estimated considering the following scenarios: (i) losses occurring from January 2011 to June 2013; and (ii) losses related to the potential production of the citrus plant over its useful life. Although the annual incidence of HLB in the Paranavaí region is currently below 2.5%, there was a 6-fold increase in the incidence of the disease, from 0.16% to 0.96%, in the period considered. Orchards that had lesser than 10,000 plants showed a higher incidence of the disease. The losses produced by HLB generated estimated economic impacts of US$11.8 million and US$39.2 million for the first and second scenarios, respectively. These results highlight the importance of the prevention and management of this disease.

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Plano de ação para o controle de huanglongbing no estado do Paraná, Brasil

Cited by 10 publications

References 2 publications

Five Rootstocks for “Emperor” Mandarin Under Subtropical Climate in Southern Brazil

Five Rootstocks for “Emperor” Mandarin Under Subtropical Climate in Southern Brazil

Overview of citrus huanglongbing spread and management strategies in Brazil

Economic impact of Huanglongbing on orange production

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