 The study evaluates 85 integrated pest management, IPM, projects in Asia and Africa over the past 20 years and finds a mean yield increase of 40.9% and a decline in pesticide use to 30.7%, with 35 crop combinations resulting in zero pesticide use. The study also assesses successes in four types of IPM projects and finds that at least 50% of pesticide use is not needed in most agro-ecosystems, but policy support for IPM is rare and counter-interventions from the pesticide industry are common. This article was authored by Jules Pretty and Zareen Pervez-Berucha.