This paper deals with chemical control of Phyllocoiptruta oleivora on mature orange trees. All pesticides used were granular systemics. The application consisted of two parallel lines into the soil per tree. Treatments and active ingredients per tree were as follows: A) phenamiphos, 4g; B) carbofuran, 5g; C) phenamiphos, 7g; D) oxamyl, 5g; E) aldicarb, 4g; F) carbofuran,2.5g; G) isazophos, 5g; H) aldicarb, 2g; I) oxamyl, 8g; J) check. The most efficient were aldicarb (4g i.a. per tree), aldicarb (2g i.a.), and oxamyl (8g i.a.) (Tables 1 and 2). Counts of the mite numbers were made 1 day before and 8, 33, 45 and 60 days after the application (Table 2).