Does critter out pest control work?

Natural enemies, sticky traps, and systemic insecticides are examples of pest controls which work. For example, the pesticide that does what it intends to do will drop pest populations to manageable levels (such as just enough aphids to keep ladybugs fed but not enough to threaten plant appearance or well-being) since treatments which aim to exterminate (such as the gypsy moth wars) generally have side effects and result in strengthened immunity by determinedly aggressive, invasive pests.