Since I can't send my dogs to help with your rat problem, here is something I have found about fighting fire ants:
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I live in irving, but i have NO fire ants!!!
this is the reason. Orange oil is the main ingredient in fir ant controls, so in the spring, when it is time for them to swarm, I get about an 8 pound bag of oranges. Navels seem to have more oil in the peels.
I have the grandkids over, and they eat some healthy oranges, I chop the peels, and we scatter them on the lawn. It keeps the fire ants out of the yard.
they are already here, so chop orange peels, and scatter a handful right on the nests, and they will leave.
Or, just chop enough to cover the whole yard.
I just broadcast them by hand.
To stretch the orange oil and cover a larger area, easier, you can put the peels in a food processor or blender and gring them up really well, then dump them in Epsom salts.
I put the peels of about 4 large or 6 medium oranges in 2 bags of epsom Salts.
I buy containers that look like about a half gallon, of Epsom Salts at Walmart for about 3 dollars.
My front yard is about 3000 sq.ft. and I use about 6 of those bags of epsom Salts.
I just do that in the spring ( or once a year) and it seems to work the whole year.
The epsom Salts adds nutrients to the soil too.
the sugar doesn't attract ants, because you water it in, besides, if you make a healthy enviornment for the lizards, toads and grass snakes, they will eat all the ants that come into your yard. I used to have those small black ants in my flower beds, no more.
In fact, since I have a totally organic program going, I have NO unwanted insects in my yard or my house, and i use NO insecticides inside or out.
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I found it here:
http://en.allexperts.com/q/Lawns-725/Sugar-lawn-vs-fire.htm
There are a number of suggestions and ideos here
http://tinyurl.com/3qlvpb
You may need one of the spiders in the first video. He may help with your rat problem too.
