Oriental Fruit Moth, referred to as "OFM" for short, is a worldwide fruit tree pest, which mainly eats the fruit or new shoots of many kinds of fruit trees, such as pear, peach, apple, nectarine, cherry, and so on. At present, the control of Oriental Fruit Moth is still dominated by chemical pesticides, resulting in increased resistance of pests, serious fruit and environmental pollution, and other problems. Adult insect mating interference technology, commonly known as "disorientation method", which relies on pheromones, is efficient, non-toxic, and does not harm natural enemies, It has many advantages, such as non-polluting the environment, not easy to produce resistance, and wide application area, and has been widely used in the comprehensive management process of Oriental Fruit Moth, such as pest forecasting, large amount of trapping, and interference with mating. However, at present, the research on the application of pheromone to control Oriental fruit moth is mostly concentrated in single-planting orchards, while the control of Oriental fruit moth in the more serious mixed planting orchards is rarely reported. Based on this, In this study, we used the pheromone vagrant emitters [each containing the sex pheromone (270 ± 20) mg] of the OFM to study the control effect of the OFM in the single-planting pear orchard and the mixed-planting pear orchard under the conditions of 600 root/hm-2900 root/hm2 and 1200 root/hm2 densities. The results showed that the adults of the OFM in the single-planting pear orchard were concentrated in the peak period, while the adults of the OFM in the mixed-planting pear orchard occurred regularly in the overwintering generation, The peak period of adult occurrence in other generations is not obvious. In a pear orchard planted alone, the treatment of 1200 roots/hm~2 has the best effect of disorientation. The adult has not been induced during the whole investigation period, and the disorientation rate is 100%