The University of California, Agricultural and Natural Resources, Statewide Integrated Pest Management Program's website is a valuable resource for managing pests in agricultural crops.
In the following link, they present a comprehensive guide to managing pests organically.
Natural Enemies Handbook:
The Illustrated Guide to Biological Pest Control:
* combine cultural, physical, and chemical methods with biological control
* minimize pesticide impacts on natural enemies
* release natural enemies and enhance their activity
* identify, and use natural enemies to control pests in almost any agricultural crop, garden, and landscape