Being new and using a number of sources for my info that I acted on with, I used 70% isopropol undiluted with a couple drops of dish soap on my zygo, catt and oncidium without any negative effect on the plants. 2 treatments of that last week and one insecticide treatment on Sunday. And I have not seen a bug since. And I am looking for them. Because of where I live, if I can kill them before they become an infestation, I can be bug free and only have to worry about bugs when I bring in a new plant.