Not affiliated with any vendors, but I use it and it works for me, especially indoors where I can control the environment as best I can.
Last night I was greeted with dozens of gnats buzzing around the plants. I liberally sprinkled the diatomaceous earth on top of the dirt in each pot, and not even twenty-four hours later there are only a couple stragglers left. Below is a summary from a website, but it's a good read:
"Fossil Shell Flour is a terrific source of insect control without chemicals that are
dangerous to your family and the environment. Works great indoors or out. Insects
die within 48 hours of direct contact
On a microscopic level, the particles are razor sharp. When the particles stick
between the exoskeleton joints of any beetle-type insect such as an ant, scorpion,
flea or cockroach, they puncture the body. The insect then dehydrates and dies.
It will even kill beneficial insects such as honey bees, so avoid use around flowers.
Regular use will discourage insects and prevent infestations. Because of the
mechanical way fossil shell flour works, it is impossible for insects to build up resistance as with poisonous insecticides.
To kill household and garden pests
Liberally dust the affected areas. Apply directly on ant mounds and along trails.
Treat all areas where pests are found or may hide, such as cracks and crevices,
behind and beneath refrigerators, cabinets, stoves, garbage cans. Don't forget
sewer pipes and drains.
For prevention apply on window frames and sills, doorways and around the
perimeter of your home. Dust insects directly if possible. Repeat treatment
regularly. Dust around foundations.
To kill pests on pets and animals To kill and prevent fleas, ticks, mites, lice
and other external parasites, apply directly to the coat, fur, or feathers, and also to
the bedding area. Use your hands to work the powder into the coats. Treat
surrounding cracks and crevices, baseboards, carpeting and wherever fleas are
suspected. Can be applied to pets as young as a few days old without harm."
