The photos look like you may have Lace-bug damage. Sometimes, the undersides may have debris or have gone brown and damaged. Light infestations are usually tolerated, and unlikely to kill your plants.
Make sure your plants are not in full sunlight and ensure they are well mulched to keep the root area moist. In these conditions, shrubs tend to be more robust and less likely to be attacked.
If you do decide to spray the leaves make sure it is done on a cloudy day.
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Make sure your plants are not in full sunlight and ensure they are well mulched to keep the root area moist. In these conditions, shrubs tend to be more robust and less likely to be attacked.
If you do decide to spray the leaves make sure it is done on a cloudy day.