The recent warm spring weather has stimulated aphid outbreaks in many landscapes and gardens. Two short YouTube videos from the University of California Statewide IPM Program show how to battle these pests without pesticides.
Hosing Off Aphids demonstrates techniques for knocking off aphids with water.
In Aphid-eating Insects in Action see lady beetles, syrphid flies, lacewings and other "natural enemies" hunting and gobbling up aphids.
UC IPM provides much more aphid management and identification information on its web pages at http://www.ipm.ucdavis.edu/PMG/PESTNOTES/pn7404.html.