1.  Mix a few drops of liquid detergent, a couple of hot peppers or pepper sauce, and one chopped garlic clove with water in a handheld spray bottle and take aim at the insects.  
2.  In a blender, puree three hot peppers, three white onions and one garlic bulb. (No need to peel anything.) Add 3 c. water to the mixture and soak overnight in a covered bowl. Strain with a cheesecloth and add enough water to the liquid solution to make 1 gallon of spray, for use in either a spray bottle or a 1-gallon garden sprayer for the whole garden.  
3.  Mix 1 c. vegetable oil with 1 tbsp. liquid dishwashing soap. Add 1 1/2 tsp. for every cup of warm water to a handheld spray bottle, or add entire mixture to a 1-gallon garden sprayer and fill with water. Spray entire plant, including the undersides of leaves.  
4.  Chop 10 to 15 garlic cloves into small pieces to soak in 1 pint mineral oil overnight. Strain and spray oil mixture directly on infestations.  
5.  Capture and crush 1/2 c. of a single kind of insect. Add 2 c. water and strain. Mix 1/4 c. of the solution and a few drops of liquid soap to water in a spray bottle and target the insect's friends and relatives. Sounds gross, but this is a very effective species-specific control. 
  
  
  Unlike conventional pesticides, these home remedies biodegrade quickly, so for best results, hit infestations directly and reapply after wet weather and as needed. 
  
  
  Some plants may be sensitive to the soapy or acidic ingredients. To guard against burning the foliage, test the spray on a small, inconspicuous area of leaves before spraying the entire plant. 
  
  
Controlling Insects
by
The Dirt Doctor

Aphids and other small insects 
Build soil health, release ladybugs, green lacewings and trichogramma wasps. Spray garlic tea as a preventative. Spray garlic/pepper tea or Garrett Juice plus citrus oil if needed. Spray foliage with molasses and water before releasing beneficial insects. 
Spider mites 
Spray liquid seaweed and garlic/pepper tea and release green lacewings. Spray Garrett Juice plus garlic for heavy infestations. Make sure plants aren't being watered too much or too little. 
Caterpillars and bagworms 
Release trichogramma wasps. Spray Bacillus thuringiensis (Bt) or spray Garrett Juice plus garlic. 
Slugs, snails, and pill bugs 
Diatomaceous earth, hot pepper and beneficial nematodes. Cayenne pepper powder dusted on infested areas is very effective.  Spray Garrett Juice plus garlic or citrus oil. 
Fleas and ticks 
See "Flea Control the Natural Way" 
Chinch bugs 
Dust problem area with diatomaceous earth after spraying with Garrett Juice (compost tea, molasses, seaweed, natural apple cider vinegar, molasses) and citrus oil. 
Crickets 
Treat problem areas with Nosema locustae products. Spray Garrett Juice plus garlic. 
Whiteflies 
Spray a mix of liquid seaweed and garlic/pepper tea or   Garrett Juice plus garlic. 
Fire Ants 
Treat mounds and spray with manure compost tea, citrus oil and molasses.  Beneficial nematodes are also effective. 
Grubworms 
Beneficial nematodes are effective, but maintaining healthy soil biology is the primary control. Apply sugar or dry molasses to problem areas at 5 lbs/1000 sq. ft. 
Squash bugs, stink bugs and other hard-to-kill pests 
Spray with Garrett Juice plus garlic and citrus oil. 
Roaches 
Create bait stations using 50% Arm & Hammer detergent and 50% sugar. Dust indoors with mixture of 40% DE, 40% boric acid, and 10% pyrethrum.  Omit the pyrethrum once heavy infestations are under control. 
Black spot, brown patch, powdery mildew 
Best control is prevention through soil improvement and avoidance of high nitrogen fertilizers. Spray plants with Garrett Juice (compost tea, molasses, seaweed, natural apple cider vinegar) plus garlic tea, and neem. Sprays of baking soda or potassium bicarbonate (1 rounded tablespoon per gallon of water) can also be used.