关键词: 灭蟑药, 联合使用, 效果

Abstract: Objective To observe the effect of combined use of two formulations against cockroaches.Methods The effect of killing cockroaches with two formulations in five military vessels were observed.Results Before the treatment with the insecticides,the highest positive rate of vessel rooms reached 92.31% and the highest density index was 16.5.The positive rate went down to 5.13% and the density index was 0.28 for 30 days after combined use of the insecticides.With one of them,Siege gel bait,the positive rate of vessel rooms decreased from 86.96% to 8.70% and the density index from 11.3 to 0.87,but there was an obvious rebound.With the other formulation A-1 thermalfog,the positive rate decreased from 84.00% to 36.00% and the density index went down to 2.28.Conclusion Combined use of the two insecticides could obtain much better efficacy than the use of each insecticide alone,and low density level of cockroaches can be maintained as long as three months.