Standing crops face threat from pests and insects. This is dealt with pesticides and insecticides, which are different types of chemicals. What is the major drawback of this method?

Standing crops face threat from pests and insects. This is dealt with

1.	Standing crops face threat from pests and insects. This is dealt with pesticides and insecticides, which are different types of chemicals. What is the major drawback of this method?
Answer» Standing crops face threat from pests and insects. This is dealt with pesticides and insecticides, which are different types of chemicals. What is the major drawback of this method?