Profile: Certis U.S.A. L.L.C. manufactures and supplies biopesticides. Kleentek® is a unique technology that prepares tissue culture for disease-free sugar cane growing stocks. botanical agricultural insecticide. Our product Neemix® is an insect growth regulator. It controls targeted insect larvae by interfering with the insects ability to molt. It is effective on all larval and pupae stages. It also reduces damage by repelling and deterring feeding of all stages of insects.