The best way is organic control of aphids. Bring in predators that feed on aphids and this will solve your problem. Predators of aphids include lacewings, lady bugs, aphid predator (which is actual bug called that) and hoverflies.
You can also plant companion plantings like mint, fennel, dill, yarrow, clover and dandelions in garden which attract aphid predators to your garden and thus keep your gardens aphid-free naturally.Mix the following ingredients: 1 cup vegetable oil or white mineral oil, 1 ½ cups water, 2 teaspoons of dish soap or Murphy’s soap. Spray this on aphids attacked areas for few days. Aphids will run away of suffocation.
Alternatively, I’ve used a half baking soda and half water solution with a couple of drops of Dawn dish detergent which creates a dusty paste that the aphids do not like and sends them packing for more scrumptious goods. After you are sure they are gone, you can simply rinse off the powder with your garden hose. More stubborn dustings may need to have you fill a small bowl or plastic baggy and immerse and swirl gently until the baking soda dissolves.
Another remedy is to avoid over fertilization of plant. Aphids are attracted to over growth in overly fertilized plants and attack whole plant.
Fighting Japanese Beetles and Aphids at the same time? Spray the plants with the oil solution, and then purchase a Japanese Beetle Trap and attach fly paper to the top to catch the aphids! But be sure to put these traps at least 15 feet away from your plants you are trying to protect. It is important to empty the traps daily and ensure the bait is fresh. Beware: full bags can attract raccoons who will gladly eat your trappings.
If you get to the point where you want to grab a blow torch, you can always call the Garden Nanny for help!
