Winning the Mealybug war!
I am almost ready to declare victory in my greenhouse over the severe mealybug infestation I had. I was trying everything. I tried Imidacloprid, Orthene, Cygon, Lady bug release, and finally turned to Neem Oil. The Orthene knocked them back, but did not eradicate them. Repeated sprays with Neem has done a lot more to get rid of them. Its harder using the Neem. It has to actually touch the bug or egg in question, so I have to spray tops and bottoms of leaves and stalks, which means getting up on a ladder to spray plants that are between 10-20+ feet tall. It takes a while to make the greenhouse circuit and be certain everyone got adequate attention. But its WORKED. I am down to spraying every 10 days from every 7, and my sooty mold is practically gone, there's no sticky honeydew, the scale was eradicated weeks ago, and all I see are isolated mealies that are in the juvenile stage. No adults. These must be ones that are hatching in "secret" places like in leaf axils that aren;t getting Neem so I will be more vigilant.
I recommend Neem over insecticides. I'm a believer now.