Homemade Weed Killer 1 gallon of white vinegar, 1/2 cup salt, Liquid dish soap (any brand), Empty spray bottle. Put salt in the empty spray bottle and fill it the rest of the way up with white vinegar. Add a squirt of liquid dish soap. This solution works best if you use it on a hot day. Spray it on the weeds in the morning, and as it heats up it will do its work. Good to know!
hydrogen peroxide can be used as a pesticide. Spraying the plant thoroughly with hydrogen peroxide mixed in the equal amount of water kills the pests and their eggs. The hydrogen peroxide also kills the bacteria that develop on fruits and vegetables.