Incidence of Pitch canker symptoms on inoculated stems in untreated and treated trees.

Incidence of Pitch canker*
Date of InoculationJuly 1July 30Aug 22Sept. 30
April 30++++
June 3+++
July 1++
July 30+
  • * (+) Each of the two inoculated branches on both untreated and treated trees showing characteristic dieback caused by pitch canker.

    (-) No symptoms.