1. Kill cockroaches
What you need:

Baking soda

sugar

Shallow dish

Application:
Mix baking soda and sugar in equal parts. Place in bowls near cockroach hiding places. Sugar attracts them, baking soda kills them.

2.
Repel ants What you need:

Baking soda

powdered sugar

Application:
Mix the ratio 1:1 and sprinkle along paths or entry points.

3. Prevent garden fungus
What you need:

1 tablespoon baking soda

1 gallon of water

A few drops of dish soap

spray bottle

Application:
Spray on plants weekly to stop mildew. Avoid hot, sunny days.