关键词: 旅客列车, 密度, 侵害率, 防治措施

Abstract:

Objective To determine the habits and distribution patterns of cockroaches on different types of passenger trains for effective cockroach prevention and control life in these environments. Methods The number of cockroaches crawling out or knocked off in 10 minutes after pesticide spray was recorded to calculate the infestation rate and average density. Results The average infestation rate was 27.7%, as shown in descending order as follows: Series 22 (45.5%)＞25B (37.7%)＞25G (24.2%)＞SYZ25B (16.7%)＞25K (7.4%) and CA (90.0%)＞YZ (32.3%)＞YW (17.1%)＞RW (5.0%). The average density was 2.51 roach per compartment, as shown in descending order as follows: Series 22 (4.58)＞25B (3.75)＞25G (2.01)＞SYZ25B (1.17)＞25K (0.43) and CA (6.35)＞YZ (3.51)＞YW (1.30)＞RW (0.15). The perching positions were mainly the four corners of a compartment, the crew room, the storage room, the electric motor of refrigerator, ventilations beneath the kitchen and the distribution room. Cockroaches were also seen at the light boxes in the washrooms and ventilation holes at the compartment roof. Conclusion The passenger trains are heavily infested with cockroaches. Cockroaches have been found at the light boxes in washrooms, ventilation holes at the roof, middle bunks and other higher positions, varying on different types of trains. Those positions and other hiding places such as the distribution room should be specifically investigated during cockroach control. Pesticide spray and gel baits are effective control measures.

Key words: Passenger trains, Density, Infestation rate, Control measures