The chemical control option should be considered a limited resource . As with all limited or scarce resources we need to conserve what we have. Many of the chemical companies are no longer developing traditional pesticides. The cost of discovery, development and registration are simply too costly. Therefore, we must conserve what we have and guard carefully the few new products which become available.
Most people think that chemical control merely means pesticides.
The chemical control option also contains repellents, attractants and pheromones, and desiccants. Inorganics are pesticides without carbon which can be natural earth minerals or man-made compounds. Acts mainly as a desiccant and is rarely useful in landscapes unless combined with an insecticide like pyrethrin. Sulfur - an ancient control for insects and mites. Since it is a stomach poison, it does not adversely affect beneficial predators and parasites.