You are very welcome!* I'm glad that was helpful.* There are many different types of horticultural oil.* One is made from petroleum and another is made from sesame seeds.* Try and get Organocide which is made from sesame seeds.* Organicide is made from petroleum.
http://www.ces.ncsu.edu/depts/ent/no...her/not45.html
Good luck!
Newt
When weeding, the best way to make sure you are removing a weed and not a valuable plant is to pull on it. If it comes out of the ground easily, it is a valuable plant.