cant tell much from that distance.. but what happened to the two that were removed.. leaving the blank spaces??? this looks like a slow progression that has been going on for a while... have you ever had a soil test done .. what did the dead ones look like ...underground ... this is where you tell me you just bought the house ... whats the deal with the lawn green under the camera.. and near dead out by those plants ... how bad has drought be the last 2 seasons??? ....since they are mature plants.. i would think heat is not an issue.. they have been there a rather long time .... is there a mulch volcano on the tree.. or is that a camera trick ... so many questions.. so little time ken

Lace bug... Horticultural oil will give control if thorough coverage is achieved on the undersides of leaves. Systemic insecticides, such as acephate (Orthene), will give good control with usually minimal impact on beneficials if plants are no longer in bloom (bees) and label instructions are carefully followed. Here is a link that might be useful:

Tina, I don't have my tree/shrub book in front of me(Pirrone) - I keep it at the library. But I want to say that your shrub is a Purple Sand Cherry and the insect that chews the holes is a wasp. I treat trees and shrubs and do not really have control over this problem. I also see it on Newport Plum - similar tree. It really is more of a cosmetic problem and will not kill the shrub like the borers that it OFTEN gets. A similar shrub I recommend as a replacement for Sand Cherries is a Diablo Ninebark - so far NO insects or diseases. So I really wouldn't worry about it- your shrub should be fine.

Shrubs in trouble Shrubs are a generally trouble-free type of plant. Mature shrubs can generally shake off insect and larval attacks, handle fungal diseases, and get through occasional droughts or floods. The occasional pruning of dead branches is often the only maintenance they need for years on end. Unfortunately, things can go wrong and sometimes you need to help out. Often, a little TLC, fertiliser, attention to watering, and judicious pruning, is all that is needed and the shrub will recover on its own. Leaf problems Why are there holes in my leaves? Usually, holes in leaves are caused by insects or insect larvae. The first step is to identify the culprit. Neat round cuts in the edges of leaves indicate leaf-cutter ants or wasps, while skeletonised leaves are caterpillar attacks. Once you have identified the little monster you can choose a means of control. Unless the attack is very severe, you can generally just let things take their course and the shrub will be fine. Occasionally, fungus can cause distinctive holes in leaves. Small dried-up patches on leaves tear into ragged holes as the leaf grows. Again, unless the attack is severe there is no need to treat this. What are these dead lines on my leaves? Grey meandering lines visible on leaves are the result of leaf miners, small larvae that live inside the leaf and eat it. They rarely damage the health of a plant, but can be unsightly on broadleaf evergreens. Minor damage can be treated by removing affected leaves. Severe infestations must be treated with a systemic insecticide. Why are my Cherry/Peach/Almond leaves all curled up and dead? Many flowering Prunus shrubs and trees are prone to Peach Leaf Curl, a fungal disease that attacks the leaf buds and sometimes the flower buds. It causes the mature leaf to be deformed, turn brown and crispy, and to drop prematurely. Treatment must be preventative with fungicide being applied after leaf drop and before bud burst. With repeat cases, the best approach is to replace with a resistant variety. What's that black stuff all over the leaves? Uusually back sooty deposits on leaves and branches are a fungus growing on sap produced by insects. It is not unhealthy for the shrub, but is unsightly. These can be aphids, but on shrubs the cause is often scale, small bumps on stems and underneath leaves. Again, this is rarely damaging to established shrubs. Treatment is to physically remove with your thumbnail or a small stick. Severe infestations can be sprayed with horticultural oil, but follow the instructions carefully since it can be toxic to the plant. Insecticides are rarely effective against scale. Why are leaves dropping off my shrub? Most evergreen shrubs drop some old leaves each year and this is perfectly normal. Even deciduous shrubs can drop older leaves during the summer and obviously drop them all in the autumn. Dropping more leaves than normal is usually due to some shock to the plant. This could be drought, overwatering, transplant shock, root damage, or a disease. In most cases, it is a good protection mechanism for the plant and once the cause of the shock is removed the shrub will recover. If disease is the cause, this should be identified and treated if necessary. Branch problems What are those lumps all over the branches? Little white, brown, grey, or black bumps on branches are usually scale insects. Read all about them in the leaf problems section.