only sugar ants
The effect the chalk has on ants is that it can penetrate their skin and dehydrate them. Chalk can slowly kill an ant.
No they will walk right over it. Cucumber peels placed where they get in the house or in cabinets will repel them - keep them away. One peel will work for a few days.
The ants can't cross the line of powder.
YES
A few bay leaves scattered loose on cupboard shelves will repel inspects of many kinds, including ants.
Tomato juice kills my ants
Lavender can be used to repel ants. They do not like the smell of it. You can use dried lavender, lavender oil or lavender plants around the home.
Yes, ants are repelled by the scent coffee gives off. You can see other natural ways to repel ants at the related link below.
yes
Fire ant bait. There are some very good ones out there.
Moth balls will repel ants. However, moth balls are toxic and not safe to use. Instead use a 50/50 mix of water and vinegar which can be sprayed in areas that ants have been seen in.