Natural methods of control
• Aphids have a whole host of natural predators that are found in your garden; earwigs, hoverflies, lacewings and ladybirds to name but a few. Deadwood corners, insect hotels or lacewing boxes provide beneficial organisms with a good opportunity of setting in your garden. When there is a large range of food available, these aphid hunters can multiply in number, lessening the severity of aphid infestation. Ensure you can provide the beneficial organisms with optimum conditions. For example; an organised garden in which plant protection is constantly used is not beneficial for insects such as ladybirds, so alter your gardening accordingly.
• If the infestation is small, collect aphids by hand or alternatively rinse them off with a strong jet of water. Repeat the procedure as many times as necessary. Afterwards, ensure the plants are well ventilated for recovery.
• Soap solution: Mix 1 tablespoon of unscented soap with 1 litre of water. Spray the rose over several days with this mixture.
• Stinging nettle decoration: Use over several days until the affected areas are free of aphids.
• Remove badly damaged parts of the rose.
• Neem: A natural pesticide which can be sprayed over roses. It inhibits egg-laying, preventing progeny but be sure to use early on to obtain good results.
• Use chemical pesticide according to the instructions. It penetrates the plant and is absorbed by the aphids via the sap. Only use in exceptional cases as pesticides are harmful to the environment.