Every garden has bugs that can damage plants and those that are helpful. But how can you tell which is which? Now there’s an app for that. Mother Earth News profiles 15 of the most common garden pests, so you can take your smartphone or tablet into the garden to figure out who’s who. Then, when you find the pest, there’s a tool that’ll give you remedies that you can use to protect your crop. There’s no need for pesticides.