Cucumber (Cucumis sativus L.) target spot: epidemiological aspects and control

• Grant number: 18/02966-3
• Support Opportunities: Regular Research Grants
• Start date: September 01, 2018
• End date: February 28, 2021
• Field of knowledge: Agronomical Sciences - Agronomy - Plant Health
• Principal Investigator: Ivan Herman Fischer
• Grantee: Ivan Herman Fischer
• Host Institution: APTA Regional. Agência Paulista de Tecnologia dos Agronegócios (APTA). Secretaria de Agricultura e Abastecimento (São Paulo - Estado). Campinas , SP, Brazil
• Associated researchers: Angélica Cristina Fernandes Deus ; Lilian Amorim ; Marise Cagnin Martins Parisi ; Renato de Mello Prado ; Rosemary Marques de Almeida Bertani ; Sérgio Florentino Pascholati
• Associated scholarship(s): 18/20122-7 - Pathogenicity of Corynespora cassicola isolates in cucumber and preventive control of the target spot with phosphites and chitosan, BP.TT; 18/19923-5 - In vitro sensitivity of Corynespora cassiicola to fungicides and biochemical responses of cucumber and plant genotypes submitted to chitosan, phosphite and silicon treatments in interaction with the pathogen, BP.TT

Abstract

Corynespora cassiicola is the causal agent of the target spot in leaves of several cultivated species, especially cucumber, where reports of damage in greenhouse cultivation conditions have been very frequent. Due to the difficulty of disease management, related to the lack of information on the resistance of cultivars and the absence of registered pesticides for cucumber disease in Brazil, the objectives of this work will be to evaluate the aggressiveness of C. cassiicola isolates in cucumber genotypes; to evaluate the reaction of different cucumber genotypes to C. cassiicola isolates by epidemiological parameters of the disease (incubation period, latent period, infection frequency, lesion diameter, severity and conidia production per lesion area ) and biochemical responses of genotypes due to disease (enzymes chitinases, polyphenol oxidases and peroxidases and concentration of total soluble phenolic compounds); to verify the effect of fungicides in vitro on C. cassiicola and in vivo in the control of the cucumber target spot and to evaluate the effect of alternative products based on chitosan, phosphite and silicon in the control of the disease. The experiments of detecting the causal agent and in vitro sensitivity to fungicides will be carried out in the laboratory and the pathogenicity experiments of the C. cassiicola isolates on cucumber, reaction of cucumber genotypes to the target spot and in vivo control of the disease will be carried out in greenhouse. (AU)

Scientific publications

(5)

(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)

FISCHER, IVAN HERMAN; MELEIRO DA SILVA, LUCAS; MARQUES DE ALMEIDA BERTANI, ROSEMARY; FERNANDES DEUS, ANGELICA CRISTINA; MOTA DA SILVA, VICENTE; DE ALMEIDA SILVA, MARCELO. Target Spot Control and Modulation of the Physiology in Cucumber Using Phosphites and Chitosan. GESUNDE PFLANZEN, JUN 2021. (18/02966-3)

FISCHER, IVAN HERMAN; MELEIRO DA SILVA, LUCAS; MARQUES DE ALMEIDA BERTANI, ROSEMARY; FERNANDES DEUS, ANGELICA CRISTINA; MOTA DA SILVA, VICENTE; DE ALMEIDA SILVA, MARCELO. Target Spot Control and Modulation of the Physiology in Cucumber Using Phosphites and Chitosan. GESUNDE PFLANZEN, v. 73, n. 4, p. 521-531, DEC 2021. (18/02966-3)

FISCHER, IVAN HERMAN; MORALES, JOAO VITOR PELIZZARO; DA SILVA, LUCAS MELEIRO; PARISI, MARISE CAGNIN MARTINS; AMORIM, LILIAN. Cucumber target spot control and Corynespora cassiicola inhibition by uni-and multi-site fungicides. CROP PROTECTION, v. 162, p. 7-pg., 2022-08-24. (18/02966-3)

FISCHER, IVAN HERMAN; PELIZZARO MORALES, JOAO VITOR; DA SILVA, LUCAS MELEIRO; DE ALMEIDA BERTANI, ROSEMARY MARQUES; FERNANDES DEUS, ANGELICA CRISTINA; PASCHOLATI, SERGIO FLORENTINO. Activity of Phosphites and Chitosan on Biochemical Responses and Target Spot Control in Cucumber Plants. GESUNDE PFLANZEN, v. N/A, p. 11-pg., 2022-10-26. (18/02966-3)

FISCHER, IVAN HERMAN; DA SILVA, LUCAS MELEIRO; AMORIM, LILIAN; GALLI, JULIANA ALTAFIN; PARISI, MARISE CAGNIN MARTINS. Response of cucumber cultivars to target spot based on epidemiological components of the disease monocycle. JOURNAL OF PHYTOPATHOLOGY, v. 169, n. 7-8, p. 10-pg., 2021-04-08. (18/02966-3)