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Knockout Rose Bushes

Q.Holes in the leaves of knockout roses,

Zone 35242 | Anonymous added on May 18, 2019 | Answered

What causes the holes and what can I do about them?

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Answered on May 19, 2019

The holes in the leaves are likely due to little beetles that have long snouts. They poke into the leaves and suck out the juices. I would recommend buying some Bayer Tree and Shrub granules. Apply the granules per the label instructions for ornamentals/shrubs. The granules have some food in them to help strengthen the rosebushes and also a systemic that will kill the beetles and some other insects or worms that would suck the juices out of the leaves. You could also use a systemic insecticidal spray if you wish to accomplish relief from the problem.

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