关键词: 密度监测方法, 阳性率, 密度, 对比试验

Abstract:

Objective　To evaluate the effectiveness and comparability of three methods of cockroach density monitoring in the same unit, providing scientific basis for the standardization of cockroach density monitoring and the assessment of control efficacy.  Methods　Three commonly used density monitoring and measurement approaches were tested in three units with different infestation rates. For each place, visual observation, glue traps and sprays were concurrently conducted in order. Data statistics was tested using Chi-square, two-sample mean-comparison test and one-way ANOVA.  Results　（1） Except for three units where no cockroaches were captured, cockroaches were detected in 28 out of 31 experimental units by the three monitoring methods. （2） The detection rates of visual observation, glue traps and sprays were 48.82%, 46.08% and 48.44%, respectively, without statistically significant difference (χ2＝0.556，P≥0.05). The density indexes were 9.65 /room, 7.04 /trap and 13.57 /room, respectively.（3） Regardless of high, intermediate or low infestation rates, no statistical difference was shown in the positive rates and density indexes derived from three approaches. Conclusion　The three methods were all useful in density monitoring, investigation and efficacy assessment. However, the sample size, the responsibility of monitors and the adherence to standard procedures determine the accuracy and reliability of positive rates and density indexes whichever approach is taken. Establishment of indexes for glue traps is desired.

Key words: Monitoring method, Positive rate, Density, Comparative experiment