The introduction of DDT, an inexpensive and successful compound, put a good stop to Organic control experiments. By the sixties, difficulties of resistance to substances and damage to the ecosystem started to emerge, and biological control had a renaissance. Chemical pest control is still the predominant form of pest control https://www.bing.com/maps?osid=3e178825-d437-4437-b793-7dc2af70b3ee&cp=47.464637~-122.317818&lvl=12&imgid=9de420fc-35af-435c-bc81-d594a33bf1db&v=2&sV=2&form=S00027