The concept behind area$-$wide pest management is that existing technologies are most effective when used over a multistate or multiregional area. Crucial to success is to have all or most of the farmers in a large area simultaneously implement the program so that pests have no safe haven or alternative food source. Adoption of the technologies by growers and pest control practitioners is a goal of demonstration projects.

$-$Robert Faust, "Integrated Pest Management Programs Strive to Solve Agricultural Problems"

Which of the following sentences presents the main idea of the paragraph?