BASF Ultra Pure Horticultural Oil, 2.5 GallonUltra Pure Oil Horticultural Insecticide, Miticide and Fungicide Ultra Pure Oil Horticultural Insecticide, Miticide and Fungicide is a year round spray oil formulated with 99 percent unsulfonated residue to give growers broad spectrum control of insects, mites and fungus with a lower potential for phytotoxicity. Growers can use Ultra Pure alone or within a tank mix to provide effective control of adelgids, aphids, fungus gnats, lacebugs, leafminers,