Monitoring is a key activity in management of pests such as phytophagous thrips (Thysanoptera). Sampling thrips on medium and tall trees has been difficult without appropriate tools. The study compared the number of thrips collected and collection time by a new method of top-canopy spraying with an original device that is more efficient and practical versus two other collection methods, beating and conventional spraying. Design, construction, and validation of the thrips-collecting device for sampling top strata of orchard trees such as avocado (Persea americana Mill.) are presented. Similar numbers of thrips were collected with conventional methods and the new collecting device. Average collection time between spraying and beating methods was reduced 48 and 67%, respectively. Using the device to collect thrips at top strata of trees resulted in less risk to collectors in an effortless way. Use of the thrips-collecting device for the top part of the canopy and the conventional spraying method for the lower part could improve detection of phytophagous thrips, and might enhance efficiency of control methods by implementing them in a timely way.