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White cocoons under leaves

By Almanac Staff

We suspect that you have scale insects on your hydrangea. Try to wipe the insects off with a cloth dipped in insecticidal soap. Then rinse with a spray of water. To control them spray the leaves with a mixture of insecticidal soap and horticultural oil.

Spray a mixture of insecticidal soap and horticultural oil to control scale insects. The oil smothers the slow-moving insects.

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