Ant Powder On Lawn >.<

[Tbag]

we're getting a bit infested out the back so I had to go out and dust the problem spots today, unfortunately as I was doing one spot a gust of wind caught some of the powder and blew it over a bit of the lawn! It was a very fine cloud and not a whole lump/squirt of powder thankfully but I'm a bit worried!
I've given the area a good sluicing down with water and moved the piggies run right back from it. Does anyone have any advice or other suggestions for what I can do? Will a good spot of rain (or a hosing down if I can borrow a hose from somewhere) do the rest of the work clearing it up?

 

[Tbag]

Oh and just to clarify piggies were indoors and nowhere near the incident!

 

[Chief Guinea Pig]

I think I'd leave it a month like you would with weed killer. How annoying!

 

[Tbag]

Ahhhh no! A whole month of no grass time?!?
Boy am I going to be in trouble!

 

[theoretikos]

Having the same problem...

 

[Critter]

Yeah I'd definitely leave it - I don't know how long but the suggestion of a month sounds good. Perhaps longer. A good hose down sounds good too. Let the grass grow, then cut it, then let it grow again then cut it. Reasoning behind my thinking is that if the grass uptakes some of the chemicals from the powder in the soil you don't want the piggies ingesting it, so cut the growth off and hopefully what grows after left will be more 'pure'