I have several hedges that are losing leaves, including azaleas, pitassporum
(spelling), boxwoods, and holly. Some of these plants have had a lot of
leaves completely fall off, while other areas show some kind of disease
indicated by the leaf edges turning brown, or in the case of the holly, a
light purple. All of these plants are within 25 feet of each other.

In most affected areas, I can see new buds generating already, giving me
hope that this is not a continuing decline.

Although this event happened during a three week period that I was out of
town, I also lost one complete azalea plant in the same area, early in the
spring of the year. When that plant died, it was not regenerating buds for
new growth like these plants are doing.

I am trying to figure out if I likely have a fungus, or if these problems
are caused by insects. I did a bit of research via Google, but I was
surprised to find that it was hard for me to distinguish if my symptons
sound more like a result of fungus or if these plants are being eaten by
insects. I thought that usually, evidence of bugs was pretty obvious, with a
lot of holes or parts of leaves eaten off. Although I can see just a very
few holes, they are small, and not very significant to me.

I thought of spraying for bugs, waiting 2 -3 days, then spraying with a good
fungicide, but I wondered if this might harm the plants or be
counter-productive.

I will appreciate any help or advice please.