The research was about Pest Control of Araecerus Fasciculatus Warehouse On Cassava Cassava Using Soursop leaf powder (Annona muricata). The research aimed to know the effect of Soursop leaf powder and it’s effective ness in controlling Araecerus fasciculatus. This research was conducted at the Laboratory of Protection, Faculty of Agriculture, University of Muhammadiyah Yogyakarta in February until April 2018. This research used experimental methods with a single factor which arranged in a Complete Randomized Design (CRD). The treatment consist of four levels of dose soursop’s powder were 2 grams, 4 grams, 6 grams, 8 grams, and control treatment. Parameters observed west pest mortality, mortality, efficacy, percentage of feeding inhibition, product quality and test of pest growth. The research showed that the soursop’s powder pesticide had significant effect to control Araecerus fasciculatus pest in on cassava cassava stored for 48 days. The best dosage of powder of soursop leaves is at the treatment of 6 gram / 50 gram. The best treatment of dose soursop’s powder on 6 grams can control the pest of Araecerus fasciculatus on dried cassava with percentage of mortality and efficacy of 88.88%