my rose bushes are eaten up

Asked May 28, 2019, 5:36 PM EDT

what is the cause of this debacle and how do I remedy it

Baltimore Maryland roses rose slugs shrub

1 Response

The holes on the leaves are caused by rose slug sawfly larvae. There are several types and may be active through the fall. Look on the undersides of the leaves for the young larvae. If the infestation is light, pick off and destroy the larvae by hand. To control heavy infestations, use horticultural oil or spray with spinosad. Target the undersides of the leaves. See our website for more information
https://extension.umd.edu/hgic/rose-slugs-shrubs

Marian