12/29/2025
🐜 Aphids: Quick Facts from RHS
Quick facts: 🟢 Also known as greenfly/blackfly. 🔬 Over 500 species in the UK. 🌱 Affect most plants. 🕒 Most active in spring & summer.
What are they? Tiny (1-7mm) sap-sucking insects. Can be green, black, yellow, pink, white, or woolly. Found on shoot tips, under young leaves, and on flowers.
Do I need to panic? NO! ✅ Aphids are a normal part of a healthy garden and a vital food source for wildlife (ladybirds, birds, etc.). 🚫 They very rarely kill plants. The main issues are some distorted growth, sticky "honeydew," and the sooty mould that grows on it.
✋ How to Manage Aphids (The RHS Way)
The RHS advises NOT using pesticides (including organic ones), as they harm biodiversity. Instead:
1. Tolerate & Squash 🤲: Accept small populations. For early colonies, use your finger and thumb to squash them.
2. Encourage Predators 🐞: Welcome ladybirds, hoverflies, lacewings, and birds. They are your best natural control!
3. Be Patient ⏳: In spring, aphid numbers often rise before their predators become active. Wait it out—balance is usually restored.
4. Special Cases 🌳: Don't bother controlling aphids on trees; they're part of the tree's ecosystem.
5. Greenhouse Help 🏡: You can buy biological controls like lacewing larvae or parasitoid wasps for indoor use.
🔍 Key Symptoms to Spot
· Colonies of small bugs on new growth.
· Stunted or curled leaves.
· Sticky residue (honeydew) on leaves or surfaces below.
· Black, sooty mould growing on the honeydew.
· Ants farming the aphids for honeydew.
📝 Top Tips to Remember
· Check plants regularly for early action.
· Aphids are part of the garden's food web – total eradication isn't necessary or desirable.
· Physical removal (squashing, jet of water) is the most eco-friendly immediate control.
· On edible crops, be extra vigilant as some aphids can spread plant viruses.
