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Knockout Rose Bushes

Q.Knockout Rose Bushes

Zone 20121 | maritime86 added on November 7, 2020 | Answered

Hello I live in northern Virginia and my knockout rose bush leaves have white spots and holes. What can do to fix this. Please see attached photos. Thank you, please reply back at maritime86@gmail.com

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Certified GKH Gardening Expert
Answered on November 10, 2020

The photos look like rose slug damage. You can control those with horticultural oils or insecticidal soaps. Although they look like a caterpillar they are not, so Bt is not effective as a treatment.


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