Lecanium%20Scale (Coccus%20hesperidium) - These%20tiny%20insects%20appear%20as%20flat%2C%20oval%20like%20scales%20that%20can%20cover%20the%20stems%20and%20twigs%20of%20a%20multitude%20of%20hardwood%20and%20ornamental%20species.%20The%20scales%20can%20spread%20widely%20over%20a%20host%20plant%2C%20and%20cause%20long-term%20stress%20as%20they%20extract%20sugars%20from%20their%20host.