Aphids in various stages. Attacking and damaging:
1. They prefer specifically cultivated roses and sometimes raspberry and currant.
2. The aphids colonize the top shoots, flower buds and the underside of leaves.
3. The attacked leaves twist, then they turn yellow and they fall.
4. Shoots stop growing and floral buds bloom later.
5. The resulted flowers are of poor quality and fragrance free.
6. Pest excrement contain sugars that are highly appreciated by ants. Thus, the ants become protectors of aphids, which protect them and sometimes carry them to the healthy branches.
7. When they are not consumed by ants, on the aphid’s excrement the Capnodium salicinum fungus grows – a black mucus will occur on the surface of leaves.
How it can be prevented:
1. Keeping roses in a state of good health will give them a higher resistance to pests.
2. Clean and burn the affected branches, rake the leaves and other debris from around the attacked plant and destroy them by burning.
3. Limiting pest’s biological reserve severely limits the intensity of the attack in the next year.
How to combat with bio methods:
1. Planting lavender in the vicinity of roses will reduce aphid attack.
2. In small gardens, where roses are not many, aphids can be removed by crushing between the fingers.
3. Protect and encourage the establishment of ladybugs in the garden, which are large consumers of aphids.
4. Earwigs are also predators of aphids.
5. Spraying cola over the aphids sometimes give good results.
6. Spraying soap and pepper over the roses can also remove aphids.