Pour the pesticide into the container, and screw the end of your hose onto the sprayer. A good low-tech treatment for decorative plants consists of a mild solution of dishwashing detergent and water in a spray bottle. Spray your plants with the solution to keep a wide variety of insects away. One drawback of this technique is that you'll have to reapply the solution after every rain. Another low-tech method for keeping insects away from your garden is to grow herbs such as parsley and catmint.
Tiny worms known as beneficial nematodes can be a big help in keeping insects under control.
When the sponge is squeezed into a bucket of water, the worms are released. Spray the water over the yard to distribute the worms evenly. If you're having trouble with snails and slugs, treat them to a glass of beer. The aroma will attract them, and they'll slither in and drown.