Their killing effect is slightly lower while the knockdowneffect against housefly is even better.
前者的致死作用略低于后者，而对家蝇的击倒效果却优于后者。
2
Health insecticide coating type WS-I was shown to have very strong knockdown and cidal effect on mosquitoes, flies and cockroachs.
型卫生杀虫涂料，经实验室试验表明对蚊蝇和蟑螂具有很强的击倒作用和杀灭能力。
3
Conclusion it had a superior knockdown and killing effect against general hygienic insects and it was worth promoting and applying as a new insecticide.