Yes, I do have a recipe that I copied from my wife. She copied it from another source that she has forgotten. So my apologies to the original author for this recipe but it does work. Puree 6 or so garlic cloves in a blender with about 2 cups of water and a few hot chilies like Jalapeños. Strain the puree into a spray bottle and add 1/4 t-spoon of liquid soap.

Spray this homemade potion directly on your plants. Insects and fungal diseases should avoid the plants that were treated. Keep this spray bottle around because you will need to retreat after each rain or watering.