Sometimes the best insecticide is no insecticide at all. I have been maintaining one organic orchard for over five years. When a prospective buyer asked to meet the gardener, I was impressed. She took due note of the overabundance of toads and snakes. See by not having mucked up the balance, natural predator controls where keeping problem species under control.
Biological controls are widely available or constructible.
Predator wasp nests can be constructed much as one makes a Mason bee nest. If you encourage habitat to encourage natural controls, most 'buggy' problems will be minor. Encourage habitat for such insects, such as wasp or ladybug homes. Use pheromones to attract them. Introduce, through purchase new populations as needed.