Measures for reducing primary infections in the integrated management of Huanglongbing in São Paulo citrus belt: technical and economic feasibility

• Grant number: 17/21460-0
• Support Opportunities: Research Projects - Thematic Grants
• Start date: May 01, 2019
• End date: April 30, 2024
• Field of knowledge: Agronomical Sciences - Agronomy - Plant Health
• Principal Investigator: Renato Beozzo Bassanezi
• Grantee: Renato Beozzo Bassanezi
• Host Institution: Fundo de Defesa da Citricultura (FUNDECITRUS). Araraquara , SP, Brazil
• Pesquisadores principais: Marcelo Pedreira de Miranda ; Sílvio Aparecido Lopes
• Associated researchers: Andréia Cristina de Oliveira Adami ; Eduardo Augusto Girardi ; Francisco Ferraz Laranjeira Barbosa ; Haroldo Xavier Linhares Volpe ; Joao Roberto Spotti Lopes ; José Roberto Postali Parra ; Nelson Arno Wulff ; Rodrigo Facchini Magnani ; Sílvia Helena Galvão de Miranda
• Associated research grant(s): 19/13799-3 - Multi-User Equipment approved in grant 2017/21460-0: gas chromatography coupled with triple quadrupole tandem mass spectrometry (GC-MS/MS), AP.EMU
• Associated scholarship(s): 23/08547-0 - Economic feasibility study of different management strategies for Huanglongbing in the Citrus belt of São Paulo., BP.IC; 22/10301-7 - Characterization of shoot flushing maturation of two sweet orange cultivars subjected to different pruning periods and irrigation regimes, BP.IC; 22/05359-6 - Economic feasibility of different management strategies for huanglongbing disease in citrus, BP.IC; + associated scholarships 22/03749-1 - Evaluation of budding phenology and fruit production and quality in orchards submitted to different managements to reduce disease primary infection, BP.TT; 22/03981-1 - Evaluation of the incidence of HLB and of the psyllid population in orchards submitted to different managements to reduce the primary infection of the disease, BP.TT; 22/01964-2 - Cultural practices on citrus orchards for the Huanglongbing management, BP.PD; 21/10345-1 - Evaluation of the incidence of HLB and of the psyllid population in orchards submitted to different managements to reduce the primary infection of the disease, BP.TT; 21/11010-3 - Evaluation of budding phenology and fruit production and quality in orchards submitted to different managements to reduce disease primary infection, BP.TT; 21/02945-9 - Evaluation of the incidence of HLB and of the psyllid population in orchards submitted to different managements to reduce the primary infection of the disease, BP.TT; 20/08448-4 - Evaluation of budding phenology and fruit production and quality in orchards submitted to different managements to reduce disease primary infection, BP.TT; 20/08469-1 - Evaluation of the incidence of HLB and of the psyllid population in orchards submitted to different managements to reduce the primary infection of the disease, BP.TT; 19/20207-5 - Cultural practices on citrus orchards for the Huanglongbing management, BP.PD; 19/19481-5 - Evaluation of control measures to reduce the primary dispersion and inoculation of HLB in citrus orchards, BP.PD; 19/19649-3 - Efficiency of cultural and physical management in the dispersion of Diaphorina citri and huanglongbing management, BP.PD - associated scholarships

Abstract

Huanglongbing (HLB), a disease mainly associated with the bacterium Candidatus Liberibacter asiaticus, transmitted by the Asian citrus psyllid Diaphorina citri, is present in all citrus production areas of Sao Paulo State. The disease causes severe sweet orange yield losses and fruit quality damages and endangers the sustainability and competitiveness of this important agribusiness generator of income and jobs in the State. Since there is no curative methods, the prevention of new infections is essential for controlling this disease. Effective control of secondary infections, arisen from the acquisition of bacteria in diseased trees and its transmission to healthy trees inside the orchard, has been achieved with constant removal of HLB-symptomatic trees and systematic vector control within the orchard. Frequent insecticide sprays break the psyllid life cycle (from egg to adult) and prevent the bacteria acquisition by adult psyllids on non-eliminated diseased trees, and, prevent the bacteria latency period within the psyllid to be completed in the case of bacteria acquisition by adult psyllid. However, primary infections, arisen from infectious psyllids those acquired the bacteria in external sources of inoculum and often disperse from these sources to the orchard searching for new shoots to feed and reproduce, are not completely avoided by these practices. Therefore, this project aims to evaluate the technical and economic feasibility of available measures to the growers, which could be integrated in order to reduce these primary infections. Outside the orchard, measures applied directly to control the primary inoculum source will be evaluated. In the orchard edge, up to 200 m from the orchard boundary, the region with the highest concentration of bacteria carrier migrant psyllids from neighboring areas, other measures will be evaluated to bar the primary dispersion into the orchard; prevent the primary inoculation of bacteria by psyllid, and preventing the vector access to the plant or its feeding on the plant. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

VOLPE, HAROLDO XAVIER LINHARES; ZANARDI, ODIMAR ZANUZO; MAGNANI, RODRIGO FACCHINI; LUVIZOTTO, REJANE ANGELICA GRIGIO; ESPERANCA, VICTORIA; DE FREITAS, RENATO; DELFINO, JENNIFER YSLAINE; MULINARI, TATIANA APARECIDA; DE CARVALHO, ROMULO IGOR; WULFF, NELSON ARNO; et al. Behavioral responses of Diaphorina citrito host plant volatiles in multiple-choice olfactometers are affected in interpretable ways by effects of background colors and airflows. PLoS One, v. 15, n. 7, JUL 6 2020. (15/07011-3, 17/21460-0)

EDUARDO, WELLINGTON IVO; SILVA, ANA CAROLINE; VOLPE, HAROLDO XAVIER LINHARES; ALQUEZAR, BERTA; PENA, LEANDRO; MIRANDA, MARCELO PEDREIRA. Push-pull and kill strategy for Diaphorina citri control in citrus orchards. Entomologia Experimentalis et Applicata, v. N/A, p. 13-pg., 2023-01-19. (17/21460-0, 19/19649-3)

MARIN, DENIS ROGERIO; EDUARDO, WELLINGTON IVO; DINIZ, ALEXANDRE JOSE FERREIRA; MIRANDA, MARCELO PEDREIRA; ZANARDI, ODIMAR ZANUZO; TOMASETO, ARTHUR FERNANDO; GARCIA, ADRIANO GOMES; PARRA, JOSE ROBERTO POSTALI; VOLPE, HAROLDO XAVIER LINHARES. Density and Dispersal Radius of Tamarixia radiata for Control of Diaphorina citri in Citrus Groves. Neotropical Entomology, v. 52, n. 4, p. 8-pg., 2023-06-27. (17/21460-0, 19/26071-8, 19/19649-3)