The months of February and March are called Bunuru season according to the Nyoongar people. This is the hottest time of the year with little or no rain but often high humidity. Sometimes gardens are overwatered as a result and when there is abundant growth on plants, particularly in small gardens where there is limited space, the air does not circulate well. This can create the perfect environment for pests. In particular the mealybug. This pest is difficult to eradicate in my experience and I have had to dig out a few plants due to huge infestations. I have discovered that a homeopathic Nux Vom 30c has been the salvation of some of my dwarf Nandinas. Mealybugs lay their eggs in a mass of waxy threads which can be easily overlooked and will hatch overnight making it seem as if they appear by magic. I am currently trying out using it on the soil under the plant as well as the leaves and stems. The best time to administer it is as soon as you see any tell tale signs and before it becomes a full-blown infestation. Try it and see how you go.
Emma Stanton. AHA WA President