Browsing Washington State University Extension by Subject "Vegetable oils."
Now showing items 1-1 of 1
(Pullman, Washington : Washington State University. Extension., 2015-10)Horticultural oils are manufactured from either petroleum or vegetable oils, to be used as a pesticide on plants. Regardless of the source, these oils kill eggs, larvae, and nymphs of insects and mites by smothering them.This ...