The following products contain a combination of both insecticide and fungicide, enabling the control of both damaging invertebrates and disease: triticonazole containing acetamiprid (Roseclear Ultra, Roseclear Ultra Gun). The fungicides tebuconazole (Provanto Fungus Fighter Concentrate), tebuconazole with trifloxystrobin (Provanto Fungus Fighter Plus, Toprose Fungus Control & Protect), and triticonazole (Fungus Clear Ultra) are labelled for the control of rose black spot. Gardeners may gain a few years' respite by planting the newest cultivars which claim resistance, but as discussed above, this usually does not last.

Popular garden cultivars of hybrid teas, floribundas, climbers and patio types are often susceptible. These actions will help delay the onset of the disease, but are of limited value because spores are bound to blow in on wind-blown rain from elsewhere. Prune out all stem lesions in spring before leaves appear. If practical, pick off and dispose of any leaves that remain on the plant over the winter months. Non-chemical controlĬollect and destroy fallen leaves in the autumn, or bury under a layer of mulch.

If chemical controls are used, they should be used only in a minimal and highly targeted manner.

The RHS believes that avoiding pests, diseases and weeds by good practice in cultivation methods, cultivar selection, garden hygiene and encouraging or introducing natural enemies, should be the first line of control.

Malvern Autumn Show - 22–24 September 2023.

RHS Garden Wisley Flower Show - 5–10 September 2023.

RHS Garden Rosemoor Flower Show - 18–20 August 2023.

RHS Garden Hyde Hall Flower Show - 2–6 August 2023.

RHS Flower Show Tatton Park - 19–23 July 2023.

RHS Hampton Court Palace Garden Festival - 4–9 July 2023.

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