蟑螂防治哪家强，实验结果出炉
In the United States alone, we spend more than $2.5 billion a year trying to rid our homes of cockroaches and other pests—but a new study says some of us may be doing it all wrong.
单单在美国，每年就会花费二十五亿美元用来杀灭蟑螂和其它害虫——但一项新的研究表明有些人们所采用的方法是完全错误的。
The peer-reviewed study tested the effectiveness of baits, gels laden with insecticide, and bug bombs, devices that “fog” a room with an insect-killing aerosol.
这项同行审议的研究测试了杀虫胶饵，含杀虫剂的凝胶以及杀虫喷雾的效果，最后这种方法是用一种杀虫喷雾覆盖整个房间。
For at least one pest, the common German cockroach (Blattella germanica), bombs don’t work, says the study, but baits do.
这项研究表明，这种杀虫喷雾至少对一种蟑螂是不起作用的，那就是德国小镰，而胶饵却有用。
Scientists set off four kinds of bombs and placed two kinds of baits in 30 infested homes in Raleigh.
科学家们在罗利市的三十个有害虫的家庭里放置了四种喷雾剂和两种胶饵。
Twenty homes got one of the four bombs and 10 got one of the two baits.
其中有二十个家庭选择了四种喷雾中的一种，而另外十个家庭选择了两种胶饵中的一种。
The scientists counted the number of cockroaches before treatment and after, once at 2 weeks and once 1 month later.
科学家们随后检测了使用前和使用后家里蟑螂的数量，一次是是两周后，一次是在一个月以后。
In every home that had been bombed, cockroach numbers stayed the same, the researchers report this week in BMC Public Health.，
在每个使用了喷雾的家庭中，蟑螂数量并没有什么变化，研究员们在BMC公共卫生杂志上发表了结果报告。
With one bait, populations dropped by more than half after 2 weeks; with the other, they plummeted by more than 75%.
使用一中胶饵后，蟑螂数量在两周后减少了一半以上；而用另一种胶饵的，它们的数量则减少了75%。
Numbers went down even more after the full month.
在一个月后，数量降落得更厉害了。
Researchers also tested the amount of insecticide residue left behind by the bombs.
研究员们还检测了杀虫喷雾留下的杀虫剂残留量。
Even before the treatments, the middles of countertops, floors, and other areas heavily trafficked by humans (but not bugs) had residue; just hours after bomb use, those levels shot up 600%.
即便在使用前，厨房台面，地板和其它人员（而不是害虫）往来密集区域都已经有残留物了；在使用喷雾一个小时后，这一水平竟然突破了600%。
Some residue stuck around even a month later.
有些残留物甚至在一个月以后都还在。
Baits cost more, but given the ineffectiveness of the bombs, the researchers say they are still the best option.
胶饵价格更贵，但是考虑到喷雾剂的效果，研究员们还是说胶饵是最佳选择。
As for bombs, the researchers call them “inappropriate” for home pest control, going so far as to question whether they should still be sold for this use.
至于杀虫喷雾剂，研究员们称其是在害虫防治方面是“不合适的，甚至开始怀疑是否还应该继续销售它们。
问题
气雾剂和胶饵相比，在价格，杀虫效果以及残留物方面，哪方面有优势?
留言回复正确答案即可获得amber给你准备的红包啦，朋友们快来试试吧。
感谢关注
跟ambe一起看世界