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White spots and holes on rose leaves

10 years ago

Hi, this is a picture of a rose with holes and white spots on the leaves. It's a friends rose. I'm not sure what this is. The rose is a Knock Out, so probably not black spot . He has seen what sounds like earwigs on the roses, but I'm not sure about the spots. Any ideas?

Featured Answer

jerijen

10 years ago

Yup -- that is a BAD infestation of rose slugs! Have fun popping them little divils.

Jeri

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Comments (9)

michaelg
10 years ago
Rose slugs are chewing off the lower surface of the leaves, leaving the top membrane as a translucent white window. Just wipe them off with your thumb, or spray with spinosad.

Buford, I'm surprised an experienced grower like you isn't familiar with these. Your own garden must have some magical power to repel sawflies.
buford
Original Author
10 years ago
I've honestly never see this before. I've seen rose slugs, but never this much damage. Thanks!
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jim1961 / Central Pennsylvania / Zone 6
10 years ago
Yep Rose Slugs... We have them from May until Nov here.
They have really done some damage in your pic...
subk3
10 years ago
That's a lot of damage?! I've been holding off spraying spinosad until things got "bad" and I have worse damage on a few plants than the picture. Maybe it's time to step it up a bit here. :-)

Buford thanks for post your picture!

This post was edited by subk3 on Fri, May 17, 13 at 11:40
TNY78
10 years ago
I'm glad you posted this. I've seen the same thing on my roses and wasnt sure what it was.

Tammy
prairielaura
10 years ago
Oh yeah. Me too.
buford
Original Author
10 years ago
Michael, I was working on my yard today, and I do see some similar type of damage and even saw some of the little slugs. But not to the extent of the damage in the photo. I told my friend to try spinosad.
jim1961 / Central Pennsylvania / Zone 6
10 years ago
Tell your friend to avoid spraying at hot times of the day. Leaves will burn. The spinosad I used before had oil in it.
I found the best time to spray Spinosad or Safers insecticide soap is in the evening hours after sun went down.

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