Phosphite formulations for control of European apple canker

• Autor(a) principal: Araujo, Leonardo
• Data de Publicação: 2022
• Outros Autores: Pinto, Felipe Augusto Moretti Ferreira, Laconski, James Matheus Ossacz, Nogueira, Paulo Henrique da Silva, dos Santos Padilha, Gustavo, Eberhardt, Paulo Eduardo Rocha
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Agropecuária Catarinense (Online)
• Texto Completo: https://publicacoes.epagri.sc.gov.br/rac/article/view/1457
• topic: Malus domestica; Neonectria ditissima; doenças da macieira; indução de resistência; manejo integrado; Malus domestica; Neonectria ditissima; Apple diseases; resistance induction; Integrated management

 The aim of the present study was evaluate the effect of different phosphite formulation for the control of European apple canker (EAC). The products in vitro were incorporated in PDA medium and the development of Neonectria ditissima wasevaluated. Fruit and apple plants were wounded, followed by treatments and inoculation with N. ditissima in laboratory and greenhouse, respectively. ‘Gala’ apple trees received five treatments with phosphite at different phenological stages to protectthe natural infection of N. ditssima in field. All phosphites in vitro negatively affected the development of N. ditssima. The treatments fosetyl al (51 and 30%), potassium phosphite 0-40-20 (44 and 37%) and captan (30 and 13%) reduced the incidenceof rot and lesion diameter in fruit. In greenhouse, all treatments showed high levels of control on EAC incidence (17 to 100%) and reduction in lesion size (58 to 100%) with the exception of fosetyl al. In field conditions, all treatments reduced the numberof cankers (48 to 88%), with the exception of fosetyl al and potassium phosphite 0-40-20. The results indicate that phosphites can be used in the management of EAC, although the formulation and trademark must be considered.