I have a hedge of waxleaf ligustrum shrubs, approximately 60-70 plants along a coral.* There are oak trees near-by, and the coral is surrounded by a pecan orchard in Texas.* The shrub planting is approximately 8-9 years old and 8 feet tall.** It has been pruned only occasionally, and watered regularly (2-3 times per week)*in the Spring and Summer, but not usually in the winter months, unless during extremely dry periods.* We observed today that there are large (1/2" diam) brown spots on many leaves all along the 100 foot lenght of the shrub.* Many leaves are turning yellow and falling.* Upon closer examination, there appears to be a scale along the stems and miniscule scale-like attachments to the underside of the leaves.* The brown spots do not appear to be alive with spores, as best we can tell.* We cannot see any visible insect activity.* Is this a disease problem or a water or nutrition*issue?* Is this enough information to identify the problem or should I attach a photo?*