While a lot of folks do use DE (Diatomaceous Earth) in dust bathing areas and even as a "preventative", miracle product, it is not effective against an active infestation, and it would be wise to use Permethrin to kill the bugs dead now.
Dont know about the chemical products, since I'm not American, and so, I don't know them...
But to answer your comment about DE : naaaah...
(I have a lot of experiences with DE!)
The rooster I saved with Diatomaceous Earth was so infested
(by different kinds of lice/mites) I did not even know
how he was still alive.
That was sad... I had never seen such an infestation in my life!
Fact is, if I did not have used DE on him, I would not have found him alive the next morning : he was incredibly skinny, became
blind before the night
(and I'm pretty sure he also became deaf), and could not even walk anymore...
Poor boy... only 3 years old...!
But he is alive now.
Not thanks to some miracle : that actually just BECAUSE I put a lot of Diatomaceous Earth on him...
In fact, I find DE to be so great I even mixed some in his food...! Just in case...
(In addition, I also put Apple Cider Vinegar in his water, in order to boost his immune system... hoping it could help him...!)
The next day, the rooster could walk and see again. And he was clearly not deaf (anymore?)!
He could also eat and drink, even if not enough in my opinion... So I also gave him some melon and watermelon, to at least
try to keep him sufficiently hydrated, and to make him want to eat...
And the next days, he was getting better and better, took some weight, and could even make some healthy
sounds again!
(Note : I put Diatomaceous Earth on him again once he was better, just in case the lice/mites eggs still on him hatched!!)
Americans use a lot of chemical products, but
we are not less capable elsewhere in the world because we tend to use what we have more easily access to, or because we trust more
natural products than the chemical ones.
After all, these work
greatly for us
and for our animals!
(Some people say that Diatomaceous Earth don't work as dewormer for the birds, right?
And yet, there are people who use that
successfully as dewormer for
themselves...)
So... in case chemical products are not accessible, natural products like Diatomaceous Earth can always be good to use.
I really think that is
easy to put an end to an infestation of lice/mites by using DE.
(NOT talking about scaly legs mites or the same kind that concern the feathers - don't know how to call them in English, SORRY : for these ones, I would exclusively use Cade Oil from La Distillerie des Cévennes. 100% success rate!)