I looked up the term that you so kindly gave me, and sure enough, your culprit is mealybugs, a soft bodied sucking insect related to scale. Since you prefer to stay away from systemic insecticides, what you're using works fine. I have never noticed any difference between the males and females. I do know that the larvae are microscopic in size and very mobile.
Since you haven't seen any new ones in two weeks, I would say that they are likely clean, but keep an eye on them in the meantime. It's just a standard procedure to keep watch on your plants so creepy crawlies don't make your plants their home while you're not looking.
Other non-chemical methods to consider: neem oil and diatomaceous earth.