How to control aphids organically
Use lemon juice as an organic way of killing and repelling aphids from the plants in your garden.
I hate aphids. I really, really hate them. But I also hate pesticides, partly because I love bees and other beneficial insects which can be harmed by chemical sprays. So what to do when those nasty green blighters set up camp on my favourite plants?
Fortunately I have my own organic secret weapon that seems to work far better than any shop-bought chemical arsenal anyway. And that weapon is simply lemon juice.
I’ve got a recipe here involving chillis and garlic, but all you really need to do is grate the peel from five lemons then cut them in half and juice them.
Throw the peel 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 (a rose diffuser, that is, like this, not a lovely pretty 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.
You can then water the boiled peel and its water over the soil around the plants to give off an especially offputting lemony aroma to ward off any determined aphids who might fancy returning. Where your plants are under serious attack, you’ll need to repeat this every three or four weeks.
source: Fennel & Fern [ http://www.fennelandfern.co.uk/blog/2012/06/08/how-to-control-aphids-organically/ ]