My Mom starolizes dirt in the microwave to kill itty bitty bugs how does she do it?

Can't you ask your Mom?

I've read that you can sterilize dirt by putting it in the oven for a while (or microwaving it). Doing so will kill whatever bugs, larvae, or spores are in it (it will cook it all). I'm not sure microwaving outdoor dirt is completely safe unless it has been sifted a bit because if you get metallic bits in the microwave, it will ruin things and some bits of things can explode in a microwave.

A fungus is a type of a mushroom or else refers to a microscopic mould or yeast--not an insect.

You might actually be able to find specificinfo on how to sterilize dirt using an oven or microwave if you Google "how to sterilize dirt." Look for sites that have to do with indoor gardening.

The process will also kill weed seeds. Just put some dirt in a pan and put it in an oven that is set at 350 degrees. It doesn't take long. Nice, bug and weed free dirt. It is only practical for home use. Putting the dirt outside afterwords ruins your effort.

Don't do it in a microwave.

Soil can be "sterilized" in the oven but it smells horrible and stinks up the entire house. It's far cleaner and safer to use special seed-starting mix for starting plants and potting soil for indoor plants.

As for your spelling, you spent longer telling us to not mention it than you would have spent using spell check.