关键词: 黑箱法, 开口方向, 蚊虫, 监测

Abstract: Objective To compare the mosquito-trapping effects of black boxes with different opening directions, and to explore the operation guidelines for black box method in mosquito surveillance. Methods The black boxes with different opening directions were used, and 24 h night-and-day observation method was adopted. Results There were significant differences in trapped mosquito number among the black boxes with different opening directions (χ²=44.82, P<0.05). The black box toward the west can trap the most mosquitoes. The results from the 24 h night-and-day observation method showed that the number of mosquitoes trapped by black boxes reached the peak level in the morning (a.m. 05:00-07:00) and in the evening (p.m. 18:00-20:00), and the number of the mosquitoes trapped in the black box toward the west was the largest in each period of time, displaying significant differences (χ²=259.56, P<0.05). The seasonal fluctuation of adult mosquitoes monitored by black box method was similar to that by labor hour method, showing correlation and consistency between them (r=0.696, P<0.01). There was no significant difference in mosquito species composition as monitored by black box method and labor hour method (χ²=4.54, P>0.05), but there was significant difference in mosquito sex (χ²=121.13, P<0.05). Conclusion The black box toward the west is the best for trapping mosquitoes, and can be used for regular mosquito surveillance and the evaluation of mosquito control in special areas.

Key words: lack box method, Opening direction, Mosquito, Surveillance