How is dna extraction useful to scientists?

I have a website for you to read into that will explain  it further.

DNA extraction allows scientists to get DNA out of its usual habitat and state (contained within cells and associated with proteins). You can’t do much with it when it’s all tangled up with proteins and surrounded by other cellular structures, so extraction is necessary to do further testing.

How is DNA extraction useful for scientists? - Quora

www.quora.com/How-is-DNA-extraction-useful-for-scientists

the major pests we deal with are insects, weeds and fungal diseases. a pesticide is a product, whether organic or chemical, used to kill the target pest. there are other techniques gardeners should use that can prevent the severe infestations that make the use of pesticides necessary