Hydrangea Pests - Knowledgebase Question

N. Andover, MA
Question by tom_oneil
October 15, 1998
I have a hydrangea and viburnum which are newly planted next to each other. With both plants, holes are developing in the leaves in the middle and around the edges, with brown coloration around the borders of the holes. Is this part of the normal function of deciduous plants losing their leaves in the fall or is it a sign of a problem?


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Answer from NGA
October 15, 1998

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The symptoms you describe sound more like a critter feeding than a disease problem. Holes in leaves, even with browning edges, are generally caused by caterpillars or beetles. A healthy plant tries to seal off the injury when tissue is damaged, so it's normal for the edges of the holes to turn brown. Since you haven't discovered the culprit, and it may be long-gone before damage is even noticed, I'd take a wait and see attitude. The leaves of the hydrangea will fall off soon, and you can prune the viburnum if the damage to the leaves is extensive.

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