The gall wasp (Oncastichus goughi) is a tiny, red-eyed, black wasp, less than 2 mm in length, which lays its eggs into the young tips and stems of Geraldton Wax.
Gall wasp is native to WA and is not known to attack any other plants in the wild other than Waxflower. In cultivation it attacks all Geraldton wax types but seems to be most abundant on white waxes.
It was first reported in 1986 attacking Waxflower in Gatton, Queensland but is known to have been present in Queensland since the 1950’s. It is found in a number of Waxflower growing countries and regions including Western Australia, Queensland, New South Wales, South Australia, California, Israel and recently Peru.

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