[Aim]  To clarify the annual generation number and peak of adult occurrence in each generation of E. grisescens in Xinyang tea plantations, to compare the effectiveness of two sex pheromones for trapping this pest, and to investigate the ratio of gray and black adults in the field. [Methods]  Two sex pheromones were used to investigate the occurrence of grey and black E. grisescens in tea plantations in Xinyang City from 2019 to 2021. [Results]  In Xinyang, the peak occurrence of adults of the 1st to 5th generations is in late March, late May, early July, early August and early mid-September, respectively. There were significant differences in the number of adults in each generation; the number of 5th generation adults captured was as high as (189.3 ± 10.32) per trap in the SC tea plantation in 2020. Average annual trap-catch differed significantly among different tea plantations (P<0.05). Most [(549.3 ± 34.63) per trap]were caught in the SC tea plantation in 2020. The proportion of the gray biotype was very high; the ratio of gray to black biotypes ranged from 19.2∶1 to 212.1∶1. [Conclusion]  There are 5 generations of E. grisescens in Xinyang annually and the annual population dynamics of the gray and black biotypes are similar. There was no significant difference in the number of individuals caught using the two kinds of sex pheromone tested. These results support the development of environmentally-friendly pest control in tea gardens, and reveal the relative abundance of the grey and black biotypes of E. grisescens in the field.