| Here are several suggestions. You might check the info for home gardens about bacterial canker at the University of CA. http://www.ipm.ucdavis.edu/PMG/GARDEN/FRUIT/DISEASE/bacterialcanker.html A more extensive version of the same info, but for agricultural growers. http://www.ipm.ucdavis.edu/PMG/r8101111.html Oh, oh. Just found this about a nasty fungal problem, Dothiorella canker. This one sounds more like what your tree may have because it can attack woody parts and fruits. http://www.ipm.ucdavis.edu/PMG/r8100611.html |
Here is a link that might be useful: Dothiorella canker of avocado