The lupin aphid is gray in color, and according to Gardeners’ World, it forms large colonies capable of weakening the plant over time. Pruning infested spikes and knocking off the aphids with water pressure from a hose are the easiest ways to remove these insects.
Does soapy water kill lupin aphids?
The most commonly used non-chemical remedy is to spray them with soapy water. You can buy insecticidal soaps but many people make up their own using a teaspoon of washing up liquid diluted in 3 litres of water. The aphids are unable to breath under a coating of soap and subsequently suffocate.
Why have my lupins get aphids?
Lupin aphid is present on its host plants all year round. Small numbers of aphids overwinter on the basal buds and they begin to reproduce in spring. … When the aphids colonies become overcrowded in mid-summer, winged forms develop that can fly and colonise other lupins.
What’s killing my lupins?
Lupin anthracnose is a fungal disease of the leaves and stems. It is spread from plant to plant by rain-splashed spores, and is therefore particularly damaging in wet weather. … Anthracnose first became a problem on ornamental lupins in the 1980’s, and is now the most damaging disease affecting them.
What aphids attack lupins?
Lupin aphid is a member of the greenfly and blackfly family. It is a sap-sucking insect that feeds on lupins (Lupinus). Keep an eye out for large, greyish-white aphids, up to 4mm long, form dense colonies on the underside of leaves and on the flower spikes of lupins.
Do banana peels keep aphids away?
Add shine and deter aphids by wiping the leaves of plants with the inside of a banana peel. The peel adds shine to leaves while also leaving traces of nutrients and a natural pesticide.