Citrus Research & Technology
Citrus Research & Technology

Plan of action for the control of huanglongbing in the Paraná state, Brazil

William Mário de Carvalho Nunes, Elisangeles Baptista de Souza, Rui Pereira Leite Junior, Carlos Alberto Salvador, Dirlene Aparecida Rinaldi, José Croce Filho & Paulo Gatti Paiva

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The activity of citrus is in full expantion in the Paraná state, Brazil, and is one more option of income to farmers, generating direct and indirect jobs in various sectors of the economy. Disease control in this culture is very important and currently the huanglongbing (HLB or greening) is a disease that has potential to make unviable this culture in São Paulo state and Brazil, with serious consequences for the economy of all regions. After the diagnosis of HLB incidence in Paraná, the Secretaria de Estado da Agricultura e do Abastecimento (SEAB) established a study group in 2007, to present an action plan aimed to control this disease in Paraná. The action plan was aimed to learn more about the disease and suggest mechanisms for control and management that could assist in maintaining profitability and the citrus crop in Paraná. At the end of 2006 there was a single county with HLB contaminated plants confirmed by tests. Today, three years after, 54 counties were confirmed with the presence of contaminated plants in citrus orchads in north
and northwest regions of the Paraná state. The progression of the disease seems to be fast but It is being monitored and the measures recommended in the action plan have been implemented or are being implemented. Among all the action steps for the eradication of plants with symptoms of HLB are promptly implemented by the producers that somehow, in conjunction with other mitigation measures, has been caused disease progression delay.


Citrus, greening, Candidatus Liberibacter spp., disease control.
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