There are a number of homemade pesticide 'recipes' on the internet, but before you decide to whip up a batch in the kitchen sink read this article from Michigan State University.
There are several reasons that Michigan State University does not recommend pantry-based pesticides. A couple important reasons to keep in mind: It may not be legal and they might not work!
http://msue.anr.msu.edu/news/are_homemade_pesticides_legal?utm_source=Nursery+%26+Christmas+Tree+-+MSU+Extension+News+-+03-09-17&utm_campaign=Nursery+%26+Christmas+Trees+03-10-17&utm_medium=email
