1. Soapy Water
Mix 5 tablespoons of dish soap with 4 cups of water in a bottle and spray plants with the solution. The soap will dehydrate aphids and spider mites.
2. Neem Oil Spray
Made from the seeds of neem trees native to India, this age-old, natural insecticide and anti-fungicide repels aphids, mites, scale and other small, soft-bodied insects.
3. Pyrethrum Spray
Just plant Chrysanthemum Plants around you Asparagus and let them do the work.
This natural insecticide is made from dried chrysanthemum flowers. Mix the powder with water and dish soap to create a spray. Pyrethrum spray paralyzes flying insects on contact.
Soil pH Garlic’s strong smell not only repels vampires, it detracts bugs. Stick a clove of garlic into the soil of houseplants to keep bugs away. Even bugs hate garlic breath. Garlic can be planted in between your Asparagus. They require the same watering as well as . Buy Garlic and let them control the bugs
5. Pepper spray.
Make a solution of 2 tablespoons red pepper, 6 drops of dish soap and 1 gallon of water, and spray your plants. Black pepper, chili pepper, dill, ginger and paprika also work because they contain capsaicin, which repels spider mites and other insects.
7. Yeast - Or Beer
Place a cut in half soda bottle at the base of your plants or hang it up. Bugs crawl or fly in and cant find their way out. The Yeast smell attracts them to the soda bottle.