Answer: Sunscald can cause the problem you describe, as can feeding by spidermites. You might try simply hosing off the plants on a regular basis. Spidermites like dry, dusty places and especially like evergreens and burning bushes. Hosing off your shrubs, especially directing the spray towards the centers of the plants will discourge these pests. Insecticidal soap sprays can also help. Best wishes with your burning bushes.
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