Other superficial symptoms

Other superficial symptoms

Corky lesions with halo

Corky lesions with halo

Visual diagnosis

  •  Scab-like pale brown lesions with halo

Putative causes

  •  Tobacco necrosis virus (TNV)
  •   R. solani (AG5)
  •   Streptomyces spp.

Corky lesions without halo

More unknown corky symptoms

Visual diagnosis

  • Star-shaped cracks, without halo

Cause

  • Unknown 

Corky spot

corky spot

Visual diagnosis

  • The lesions form little corky patch

Putative causes

  • R. solani or Streptomyces spp.

The implication of these pathogens for such symptoms has not yet been demonstrated

Corky plates

other corky 3

Visual diagnosis

  • The lesions form  large corky plates

Putative causes

  • R. solani or Streptomyces spp.

The implication of these pathogens for such symptoms has not yet been demonstrated

Possible confusing symptoms :

Netted scab

Russet scab

Rhizoctonia corky lesions

Modification date : 30 May 2023 | Publication date : 25 March 2014 | Redactor : K. Boucheck, C. Chatot , M. Fiers, D. Gaucher, Y. Le Hingrat & S. Wale