WAIT! New development! About 5 min. ago, I touched the white on the stem with a toothpick and it moved. Pretty fast. In fact, it jumped off the plant, but I had already taken the orchid outside of my greenhouse. The pest is slightly larger than the mealybugs I've seen on my other two plants in the past, and they didn't move, either (but then, I didn't touch those with a toothpick). Could this be something else? If so, what do you think? OR...is part of the white area just the MB webbing?