关键词: 德国小蠊, 农贸市场, 侵害调查

Abstract: Objective To investigate the infestation rate of Blattella germanica in indoor free markets with different type stalls of different building-using-year with different control measures,and to compare the sticky-trap method and eyeballing method for density determination and whether the density will be different by using the two methods. Methods Visual assessment method,sticky trap method and enquiring were used. Results The infestation rate using visual assessment method was 32.35%and sticky trap method 35.49%. There was no significant difference between the two methods (P>0.05). The infestation rates had significant difference (P<0.01) among the buildings used for less than 4 years ( 21.90%) and more than 4 years,4-8 years ( 38.39%) and for more than 8 years ( 33.33%) using visual assessment method. But the infestation rates had no significance between the buildings used more than 8 years (P> 0.05). However,there was significance among other kinds of buildings. Using sticky trap method,the infestation rates had no significance between the buildings used less than 4 years and used for 4-8 years (P> 0.05). But there were significance compared with the buildings used more than 8 years (P< 0.01). The top three infested stalls were stalls for cooked food ( 60.00%),semi-cooked food ( 50.00%) and meats ( 44.19%) by using sight and testing. And by using sticky traps,the top three infested stalls were stalls for semi-cooked food ( 62.96%),others ( 61.54%) and bean products ( 48.57%). As control measures,the infestation rates of self-control and PCO were respectively 29.52%and 33.78%by using visual assessment method and 31.06%and 37.34%by using sticky traps. χ² test showed that there was no significance between the two measures (P> 0.05). Conclusion There was no significance between sticky traps and sight and testing on investigate the infestation rate of Blattella germanica. The longer the indoor free market buildings are used,the higher the infestation rate is,as well as the density of the cockroaches was higher. The cockroaches mainly breed in wood furniture and electric machines.