Regular pest and disease control is necessary to produce good roses on the Gold Coast.
Throughout Australia, rosarians encounter pests and diseases, however the climate on the Gold Coast (Sub-tropical) influences the severity of these. Pests proliferate quickly after winter pruning, because there is no long cold winter as in other parts of the country. One could say that roses here do not really have a period of winter dormancy, and grow and flower all year round, producing some flowers even in July. This also affects the incidence of diseases.
The main disease problem Black Spot as noted, is influenced by wet foliage and during dry spells the incidence means that less frequent foliar spraying is required. Because of the long growth cycle pest populations have many generations a year, and require regular preventive treatment. Suggested controls for Pests and Diseases are covered in regular Society newsletters, and discussed at monthly meetings where members questions are answered.
diseases