【Abstract】　Objective　To know about the mosquito density in Beijing city and Olympic venues by questionnaire. Methods　Seven districts and seven Olympic venues were chosen to implement questionnaire survey by stratified random sampling. Results　According to survey in the indoor environment, 92.31% of the respondents thought there were only a few mosquitoes in Beijing city, and 96.02% of the respondents thought there were few mosquitoes in Olympic venues. For the outdoor environment, there were 77.81% of the respondents who considered few mosquitoes in Beijing and 97.26% of the respondents considered that few mosquitoes was in the Olympic venues. About 69.85% of the respondents thought there were fewer mosquitoes in 2008 than in 2007 in Beijing. There were 80.60% of the respondents considered Olympic venues were good. Conclusion　The mosquito density in both the indoor and outdoor environment in Olympic venues was lower than that in Beijing city, and the mosquito density in 2008 was lower than that in 2007.

　　【Abstract】 　Objective　To know about the population distribution and seasonal fluctuation of main vectors by the successive monitoring from 2006 to 2008 in Beijing Olympic venues, and to provide the scientific basis for vector control. Methods 　The CO₂ trapping lamp method was used for the surveillance of mosquitoes, baited cage trapping method for the flies, night trapping method for rats and paste catching method for cockroaches. Results　Culex pipiens pallens was the dominant species of mosquito, accounting for 96.94% of the caught mosquitoes in Beijing Olympic venues. The dominant species of fly was Sarcophaginae, accounting for 46.13 % of the caught flies. Mus musculus Linnaeus was the dominant species of rats, accounting for 63.30 % of the caught rats. Blattella germanica was the dominant species of cockroaches, and all the captured cockroaches were German cockroaches. Compared with 2006 and 2007, the density of main vectors decreased significantly in 2008. During the period of the Olympic Games, the density of main vectors had been in the low level. The density of mosquito declined 88.57% and 89.26%, 69.88% and 81.63% for the fly density, 100% for the rat density and 99.98% for the cockroach density. Conclusion　The density of main vectors decreased significantly during the period of Beijing Olympic Games. No serious harmful events caused by vectors occurred in Beijing 2008 Olympic Games. The goal about vector control had been realized completely.

　　【Abstract】　Objective　To study the influence of main meteorological parameters on the mosquito density. Methods　With the data of mosquito density from 2005 to 2007 provided by Beijing Center for Disease Control and Prevention and the meteorological data such as average temperature, average minimum temperature, average maximum temperature, rainfall, rainy days, sunshine time, relative humidity and average wind speed, a multiple stepwise regression would be made with statistical software SAS 9.0. Results　The multiple regression co-linearity results showed there was strong linear relationship among average temperature，average minimum temperature and average minimum temperature. The multiple stepwise regression equation was y＝0.533 97X2＋0.078 14X7－2.673 29X8－2.232 56 （X2,  X7 and X8  represented average minimum temperature, relative humidity and average wind speed, respectively）. Conclusion　The main meteorological parameters closely related to mosquito density were average minimum temperature, relative humidity and average wind speed. The order which affected mosquito density was in turn average minimum temperature, average wind speed and relative humidity

Objective To explore the relativity between the bait palatability and efficacy.Methods The palatability of baits and gel baits keeping for 0/15/30 days under natural condition were tested.The efficacy of the baits and the gel baits were tested and LT₅₀ and 72 h mortality were calculated respectively.The relativity between palatability and efficacy was checked up.Results It is relative between palatability and efficacy of the baits and the gel baits keeping 0/15/30 days under natural condition.Conclusion The efficacy could be improved if palatability of the bait or gel bait was improved and holding water and antisepsis capability of gel bait under natural condition was improved.

Objective To compare difference of two methods for insecticide resistance detection in the resistance ratio of the German Cockroach,Blattella germanica.Methods Insecticide resistance was detected by methods of WHO and Atkinson & Zhai respectively.Results The resistance ratio(RR) measured by surface contact was 6.93 folds for permethrin,13.85 for deltamethrin and 5.60 for cypermethrin based on KT₅₀.As measured by topical application,the resistance ratio based on LD₅₀ was 22.17 folds for permethrin,64.32 for deltamethrin and 27.03 for cypermethrin.It means that the resistance ratios of this insect to permethrin,deltamethrin and cypermethrin by topical application were 3.20,4.64 and 4.83 times higher than that by surface contact method.Conclusion The results suggested that surface contact method do not accurately assess insecticides susceptibility in field populations of German cockroaches,topical application was more sensitive than surface contact tests for measuring insecticide resistance.

Objective To observe the effect of chain-bait Mortein Plus Nest Kill in all kind of condition and application foreground in fact.Methods To test the killing effect of the bait according to the national standard.To collect the dejecta and body of the cockroach as the food of the cockroach to the next experiment.Then,to test the chain effect to the imago and nymphae respectively.To test the effect with and without other food respectively.Results The killing effect of the bait reached the B level of the national standard and good chain effect to imago and nymphae.But the effect will go down if other food is available.Conclusion The Mortein Plus Nest Kill has chain-bait effect.

The Paper reports the investigative results of cockroach festation in 8 Four or Five-Star hotels in Beijing.The cockroach population density was between 0.15 and 14.31.It's averagedensity (4.21） was higher than that in Beijing city for corresponding period,and the cockroachpopulation average density at 4 Four-Star hotels were higher than that at 4 Five-Star hotels.Thedensity order of cockroach infestation site at hotels can be described as follows: bakery & pastrykitchens (9.17)>western food kitchens (5.77)>cold buffet room (5.45).