INSECTICIDES AND HERBICIDES

HERBICIDES

• Herbicides are pesticides used to kill unwanted plants.
• They are usually used on weeds or dandelions.

HISTORY OF HERBICIDES

• It was first made during world war 2 as a potential agent
• It was used as a biological weapon.
• It was discovered and synthesized by W.G. Templeman in 1940.

HERBICIDES EFFECT ON SOIL

• Runoff from the plants can effect the chemistry and bioligy
• Of land

INSECTICIDE

• A chemical that is used against insects by killing them.
• The main insects it kills are ants or termites that infest houses.

HISTORY OF INSECTICIDE

• It was first used in 1928 and created by Dr. Franklin C Nelson.
• It was mainly intended on killing flys and mosquitoes.
• It contained 5% DDT in the late 1940 and early 1950's.
• They stopped because it had negative impact on nature.
• It caused bald eagles to go to the brink of extinction.

EFFECT ON SOIL

• It caused the same effects as herbicide but was more poisonous.
• It even hurt living animals.