Answer: These plants may be showing drought stress or they may be showing some type of foliar disease. Unfortunately I can't give you a specific diagnosis based on your description. You might wish to take some samples to your UMass Extension and see if they can identify the problem and suggest controls for it. In the meantime, carefully remove and destroy any dead foliage or branches. In between cuts, clean your blades in a solution of bleach and water to avoid reinfecting or spreading the disease. Good luck with your shrubs!
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