However, there is a bigger picture. Aphids are a huge food source for ladybugs, lacewings, praying mantis, spiders and other good guys in the garden. Maybe these good predators eat ants, too. There are a lot of birds that eat aphids: chickadees, titmice, warblers, gold finch, and hummingbirds all eat aphids.
When the aphids get out of control, they can be removed by blasting them off of plants with water from the garden hose. I have also resorted to removing plants that are covered in aphids. But if their numbers seem to be low I leave them alone. They can be washed off of vegetables at harvest time. If I were to use some kind of poison to kill the aphids, I fear what it would do to the beneficial insects and the birds. And me - if the poison gets into the vegetables that I'm going to eat.
I have come to the conclusion that some aphids in the garden are a good thing (but still not my friends) in order to provide food for the true heros - the beneficial insects and birds that are keeping things in balance. I always plant some broccoli or kale to attract aphids. And I always find spiders and ladybugs hanging around those areas of the garden. I also plant some flowering perennials that will attract hummingbirds - hyssops and salvias.
When practicing organic gardening, it's all about supporting the balance.
|hummingbirds eat aphids - attract them to your garden with agastache or salvia|
|aphids on cabbage - out of control|
|ladybug patrols for aphids|