What is it?
The plant shows a severe infestation of green aphids (Macrosiphum rosae). These sap-sucking insects concentrate on tender tissues, such as shoots and buds, causing deformities and general weakness. They appear as green or pinkish protuberances on the stem. Their proliferation is favored by mild temperatures and excess nitrogen, which generates succulent shoots. Additionally, they excrete a sticky honeydew that can lead to the appearance of sooty mold.
Treatment plan
Immediate
Mechanical removal
Clean shoots with a gentle high-pressure water jet or a cloth to reduce aphid population.
1-3 days
Potassium soap application
Spray the entire plant with a 2% potassium soap solution, focusing on the underside of the leaves.
1 week
Neem oil treatment
Apply Neem oil after potassium soap to act as a systemic and preventive insecticide.
1 week
Sanitation pruning
Cut off branches with dried flowers and extremely damaged shoots to promote recovery.
Prevention
Ant control
Check for ants at the base, as they protect aphids from their natural predators.
2-4 weeks
Weekly monitoring
Inspect new shoots every 7 days to detect any reappearance of the pest.
Care during recovery
- Watering
- 2 to 3 times per week, keeping the substrate moist without waterlogging.
- Light
- Direct sun, minimum 6 to 8 hours daily.
- Temperature
- Ideal between 15°C and 25°C; tolerates moderate frost.
- Soil
- Rich in organic matter, deep, and with excellent drainage.
- Fertilizer
- Specific fertilizer for roses every 15 days in spring and summer.
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