关键词: 硼酸胶饵, 滞留喷洒, 蜚蠊, 杀灭效果

Abstract:

Objective To observe the control effects of 10% boric acid gel bait on cockroaches in the laboratory and field and compare it with residual spray in killing cockroaches. Methods The killing effects of 10% boric acid gel bait and residual spray were observed in the laboratory and simulated field according to the national standards GB/T 17917.7-2009 and GB/T 17917.10-2009. The decrease in cockroach density was determined by visual measurement after residual spray and application of gel bait in the field, and the killing effect was evaluated accordingly. Results In the laboratory and simulated field, all Blattella germanica died 2 d after treatment. In the field, the average density of B. germanica was 169.25/15 min before residual spray; the density decreased by 9.60% and 6.29% in the first and second weeks after residual spray of 10% cis-cypermethrin suspoemulsion plus 80% DDVP; then, residual spray of 10% cis-cypermethrin emulsion plus 20% propoxur EC was performed, and the density decreased by 6.63% and 5.51% in the third and fourth weeks. Finally, 10% boric acid gel was used, and the average density of B. germanica decreased by 94.10% and 100% in the first and second weeks after treatment. The average density of B. germanica was 1.38/15 min 1 month later. Conclusion The B. germanica population with high insecticide resistance is difficult to be control by residual spray, but 10% boric acid gel bait has good control effect on cockroaches and causes little insecticide resistance. Gel bait is recommendable for cockroach control.

Key words: Boric acid gel bait, Residual spray, Cockroach, Control effect