10 Principles of ecological and sustainable gardening. #7 -GO CHEMICAL FREE
Trying to control natural processes like 'pests' with chemicals is a losing battle. We all lose out. Chemicals pollute the soil, the water, get into the food chain and create all sorts of problems we simply no longer need or want. A healthy garden requires balance, ‘pests’ will eventually attract predators, you spray them with chemicals, you kill everyone, including the ones that you are potentially growing to help.
So go chemical free, check out this great advice in the below link https://www.wildlifetrusts.org/actions/how-make-your-garden-chemical-free-zone