Consider planting naturally repelling plants throughout your garden that can be both functional and Ex: Alliums-Lavender-Peppermint-Geraniums-Basil Rosemary-Garlic-Lemongrass-Thyme-Dill-Hyssop
Take care of your plants; pests are not usually interested in feasting on healthy, fertilized, watered and well-nourished plants.
Remove infested plants, dead leaves, fallen rotten fruit, and other rubbish where insects can find refuge.
Some insects are drawn to weeds and will gradually spread onto your planted perennials so be sure to keep your garden as weed-free as possible.
Add a natural predator or enemy to your garden that will destroy and conquer, but not harm your soil or other plants that you would like to protect.
Allow your garden to get good air circulation.
Purchase a pack of ladybugs, really you can do that, it is a thing. Release them in your garden to devour the offenders, they can smell funny, but hey they will get the job done.
Try a trap, the yellow sticky or the pheromone filled are both effective but not necessarily the most attractive way to reduce the pest population.
Pesticides are poison! Use carefully, avoid hurting your soil, plants, family, or animals. READ THE PESTICIDE LABEL BEFORE OPENING A PESTICIDE CONTAINER.
Homemade Spray Recipe
Mix:
one tablespoon dishwashing soap one gallon of water
Pour into a spray bottle and spray directly on the pests.