The Invasive Cacti Network South Australian field trip in May 2013 (see Post ) included a demonstration of a very successful control method used on infestations of Wheel cactus in South Australia. This method consists of stem injection with Daconate (MSMA) where a hole is drilled into each base stem with a handheld power drill. An injector is then used to inject 4-6ml neat Daconate per stem. We were shown a plant that had been injected 3 weeks earlier and there was complete knockdown. Apparently there is no regrowth. Juvenile plants have a scratch made in the plant surface with the injector and a drop of Daconate is put on the scratch. There is complete knockdown and no regrowth.
Tarrangower Cactus Control Group has begun to explore Daconate as a potential control method for those with appropriate permits.