I treated about 20 medium to large African olives in this stretch of a gully two years ago - unfortunately the frilling of several of the very large specimens was not successful so I tried again cutting and spraying the main branches plus frilling the stems. The treatment of each plant took over 1 hour. The first photo shows one treated specimen, the close up of fruits and leaves is not brilliant I must say (it was getting dark).
You need bigger loppers :-) Fortunately the olives on Isaacs/Mugga are fairly isolated. Generally I leave them alone because there are other battles to fight.
Mike, I'm afraid there are no loppers big enough to treat these monsters; see also http://canberranaturemap.org/Community/Sightings/Details/3342994. I find a fair amount of African olives on the upper west slope of Mt Majura east of Mackenzie Street, ie the southern part of Mt Majura; approximately 50% of the woody weeds I encounter there are AO (okay, I must admit that we treated Cootamundra wattles, firethorns etc in the years before I started to take gps records (autumn 2014) of the woody weeds that I treated.
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