Gardeners sometimes use ‘bug-killers’ (or pesticides) to control pests in the garden. Almost all of these can harm bees and other pollinators, even if you don’t intend to harm them.
‘Blooms for Bees’ has great advice on how to avoid ‘bug-killers’:
Garden Organic gives great tips here on on how to control your fruit and vegetable pests and diseases without bug-killers.
If you feel that you must use them, the video below shows how to do as little harm as possible to our beneficial pollinators: