Monitoring of cockroach density and seasonal fluctuation in Haikou City

Objective To survey the cockroach species,the density and the seasonal fluctuation and provide scientific basis for elimination cockroach in Haikou.Methods The population distribution,density and seasonal flunctuation of cockroach were suveyed using night sticky trap method in residential areas,hotels,eating houses,markets and hospitals.Results There were four cockroachs species in Haikou:the German cockroach,the American cockroach,the Australian cockroach and the Neostylopyga rhombifolia.The German cockroach was predominant.The cockroach density was high with average density of 2.76/nights and the numbers of cockroadch in eating houses,hotel,market,hospital,residential areas were 5.86/ night,3.26/night,1.16/night,0.55/night and 0.34/night.The cockroach density was the highest in August and the lowest in January.Conclusion The population and density of cockroach in Haikou varied and integrated monitoring and eliminating measures be adopted to control the pervalence of cockroad.