Incidence of Pitch canker symptoms on inoculated stems in untreated and treated trees.
Incidence of Pitch canker* | ||||
---|---|---|---|---|
Date of Inoculation | July 1 | July 30 | Aug 22 | Sept. 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.