Infested leaves were collected in cultivated fields of the new areas of irrigation Chavimochic, Sector IV, with the purpose of determining the biological cycle of Oligonychus sp. And aspects of its behavior in Persea americana. The samples were transferred to the Laboratory of Quality Control of the Board of Users of Pressurized Irrigation of the District of Irrigation of Moche, Virú and Chao. The experimental design consisted of 25 repetitions taken at random, with an only individual of Oligonychus sp. per experimental unit. The research was conducted during the period September 2014 – February 2015. In order to determine the gender Oligonychus sp., samples were sent to the National Service of Agrarian Health where this was confirmed. 3 fertilized females were isolated per experimental unit for the biological cycle of Oligonychus sp. and they were placed in foliar disks of 19 mm in d...