What should Timothy have done to increase reliability of his findings?

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

with this one i know the answer in craters one reason i looked it up and i learned about it there is my evidence