How to kill aphids Throw the peel of lemons into 300ml of boiling water and leave to simmer for half an hour or so. Meanwhile, pour the lemon juice into a spray can or a watering can with a rose and spray the affected leaves and stems on your plants. Aphids hate citrus, and will either die or disappear, leaving your plants to recover beautifully.
sprays all the plants citrus juice and garlic. The citrus kills off aphids, while the garlic repels slugs, and discourages any aphids from crawling back again. Here’s how to make it: Ingredients 2 large lemons 3 cloves of garlic 1 tablespoon of crushed chillis 1.2 litres of boiling water