REACTION OF TOMATO CULTIVARS (Solanum lycopersicum) TO Pseudomonas syringae PV. tomato AND Pseudomonas cichorii

• DOI: 10.22533/at.ed.40920130319

• Palavras-chave: Atena

• Keywords: bacterial diseases, resistance, disease management.

• Abstract:

  Bacterial speck (P. syringae pv.

  tomato – Pst) is one of the main tomato crop

  diseases in Brazil, being found in all producing

  regions, while bacterial blight (P. cichorii – Pc)

  has been reported only in São Paulo state. The

  use of cultivars with resistance levels is one of

  the main ways of managing bacterial diseases,

  and for this reason, this work evaluated the

  reaction of 20 tomato cultivars to Pst and Pc.

  Plants were inoculated by spraying bacterial

  suspension (108 CFU.mL−1) onto the aerial part,

  under greenhouse conditions, and severity

  assessments were based on disease scales

  described for Pst and Pc. The cultivars were

  classified based on the areas under the disease

  progression curves. The cultivars Andrea

  Victory, Sheila and Débora Pto were classified

  as resistant to Pst, while Santa Clara and

  Rebeca were resistant to Pc. These cultivars

  are indicated for planting in tomato fields with

  historic of occurrence of these bacteria and

  for breeding programmes for incorporation of

  resistance genes to Pst and Pc.

• Número de páginas: 12