chemicals that kill crop destroying organisms are called
Many farmers choose to use chemicals to keep weeds and pests from destroying their crops and to add more nutrients to the soil. There are three different kinds of pesticides; herbicides, insecticides and fungicides.All three of these pesticides are used to kill different kinds of pests that can be found on a farm.Farmers that make the decision not to use any chemicals are called organic farmers. 1  Plants need nutrients in order to grow on a farm. 2  Nutrients such as carbon, oxygen and hydrogen are always available to the plants.armers that make the decision not to use any chemicals are called organic farmers. 1  Plants need nutrients in order to grow on a farm. 2  Because insects make up 3/4 of all species on earth, they can be a big problem on a farm. 3  One of the biggest concerns for farmers is weed control.