Most common pests in Orange County? Probably Ants and Spiders. Read on to understand how to get these pesky critters under control with Preferred Pest Control! Ant Control Ants are clever insects and the tiniest cracks and holes in walls, windows, or doors can serve as entry points. Upon entry and once an ant finds an area which has food, it leaves a chemical trail, containing pheromones, that other ants pick up on and follow. Getting rid of ants is a time consuming process as an ant colony can make its home in your lawn, foundation, and even in your walls. A colony can contain up to 500,000 ants and ...