I have approximately 50 Hill's Yews which form a nice hedge and noticed the other day that there are little white fluffy things located mostly at the junction point of the stems and branches. They are approximately 1/8 inch long (no noticeable motion detected). I've been told that they are either mealybugs or some sort of scale and that a systemic insecticide like Cygon works best but it turns out that Cygon is no longer available. Is the unavailability just limited to Ontario or is it all of Canada? Also is there another systemic product other than a topical one that washes off available?