I used a once a year poison from TS and I can't remember the name but I wound up spraying the yard 4 times with it..I did not see where it worked that good so I wouldnt recommend it anyways.I then tried Bayer tree and shrub with pretty much same results and sprayed the yard 2 times with it.I Also wound up using pet armor on my dogs which is generic Frontline and frontline doesn't work here at all.Ok but for some reason the pet armor did work along with spraying my yard and I was able to control them enough to keep them off the dogs.Then winter hits and they are all gone .Next year I am ready to battle again but no fleas and now 2 years later still no fleas.That's all I can tell you about what I did and couldn't tell you which was more effective.I will tell you to spray again after 2 weeks because that's when the eggs hatch.Every time I spray I wait 2 weeks and spray again.