Protect your plants against aphids

Aphids moving in on your territory? Aphids are a common and unwanted visitor this time of year, especially on roses. Luckily, the Bay Area is also home to Syrphid flies which are natural enemies of the aphid. The Syrphid fly is a stingless fly with black and yellow bands and is often confused with honey bees. They play an important role in pollination as adults, but in their larval state they are hungry for aphids. A single Syrphid larva can eat hundreds of aphids per month. Let the Syrphid larvae do the heavy lifting and dispose of your aphid problem. If you want to take a more active role, merely spray the aphids off with water or gently run your fingers along the stems to squish them. There's no need for harsh chemical pesticides.