Circular scale
cause yellowing of leaves, premature leaf and fruit drop, and stem dieback. First signs of an infestation are dark-purple to reddish-brown or black spots [...] margins, on both surfaces of shaded leaves of the host plant. Life cycle and appearance of Circular scale Female nymphs and adults have flat to moderately [...] lower and central parts of mature trees. Circular scale prefers the leaves, but in high infestations it may spread to fruits, stems and trunks, and may cause