first thing to look at is a possible infestation of Eugenia psyllid. Leaves will become distorted and then fall off:

See UC davis article on the psyllid here

The other thing to consider is that they are young plants that just didn't get enough quite water when establishing, since we have been in extreme drought for four years. West side of fence will be hotter and more stressing because the west sun is the hottest of the day. If the tip branches are dead, no problem, just cut them off as new ones will grow. Eugenia are incredibly resilient, in the long run and with a good rainy winter ahead (I hope I hope I hope) they will be thriving next spring...

It's good that you checked the drippers to see if they were functioning well.

But it's also important to check the soil to determine if the rootzone is adequately moist.

Further, the comment about trees on the west side drying more rapidly than the others is right on.

Thanks for the responses! I really doubt it's a water issue since these have been on a drip system with each plant getting it's own nozzle. When I checked the offending plants' nozzle they were close enough that root were for sure getting water. I even opened up the nozzles a bit more so they could get a little extra water.

I thought about cutting the dry parts off but I was afraid of "topping" the plant prematurely since I need these to grow to about 7' in order to form the hedge I want.

I have some Beyer Tree and Shrub I can give these or even to all the Eugenias. Just not sure if this is a good idea or not. As you can see in the picture below, the plants on the bottom right corner are on the east side of the fence and are already about 7' tall and have no dry leaves/branches. Actually the ONLY plants that have the issue are the ones in the first picture and are located on the far west end of fence.

Don't worry about cutting them back. I've cut eugenia to the ground because I wanted to remove it, and it grew back in no time. Dieback on the top can be a symptom of root problems down below. Are they possibly too wet? I would not use Bayer advanced without knowing what the problem is. Psyllids usually do a little cosmetic damage but not much else.

BTW, nice colors on the house and the flower lined walk is inviting.

Here is a list of possible problems.

eugenia IPM

Thanks for the response. I also at one point thought maybe TOO much water. The drip was on every other day and would run for 5 minutes. Recently I dropped it down to every 3 days and only at 3 mins, but I did open the nozzles on the ones mentioned I little more. Ok so cutting off the dry parts will not cause any damage .

Thanks for the compliment =)