Roses forum→Rose Sawfly treatment

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Name: Shyam
San Francisco, CA (Zone 10b)
Image
Rose_Guy1127
Jun 23, 2018 8:53 AM CST
Morning everyone,

I have been spotting a few holes in a handful of foliages of Rosa 'The Poet's Wife' the past couple of days. I thought it could because the foliages getting punctured itself against the thorns by the wind. I was mistaken, this morning I spotted what I believe (and I could be wrong) is a sawfly. I have attached the image below. The image is kind of blurry because the sawfly was constantly moving. I looked it up online and concluded that it is a sawfly. I tried to detect a presence of larvae, but so far I couldn't spot any, again, I could've easily missed spotting the larvae. However, the holes in the foliages are increasing slowly but surely as the days progress. Yes, I killed the sawfly that is seen in the image.

By looking at the image,
1) Is it a sawfly?
2) If so, what kind of treatment is best suitable for eradicating the sawfly problem?
3) Also, when is the best time to use insecticide spray treating the sawfly?
4) Should I spray after I water the plants?

Thanks!

Thumb of 2018-06-23/Rose_Guy1127/84fd6c

Name: Porkpal
Richmond, TX
Charter ATP Member Dog Lover Cat Lover Keeper of Poultry Keeps Horses I was one of the first 300 contributors to the plant database!
Garden Ideas: Level 2 Plant Identifier Raises cows Roses Farmer Celebrating Gardening: 2015
porkpal
Jun 23, 2018 11:45 AM CST
If that photo is typical of your roses' foliage, I would not worry about it.
Porkpal
(Zone 6b)
Cat Lover Moon Gardener
Image
WitchyWV
Jun 23, 2018 8:34 PM CST
I doubt you will get many suggestions for pesticide. The good bugs get killed along with the bad, so a lot of people don't spray it, as to not kill the bees. I say this as someone currently watching japanese beetles eat holes and hump on every bloom. I don't even think anything would make a dent in them, and I'd imagine it would have to be a pretty harsh poison to bother them. I just knock as many as I can in soapy water to drown, and wait for them to move on. Sighing!
Name: Porkpal
Richmond, TX
Charter ATP Member Dog Lover Cat Lover Keeper of Poultry Keeps Horses I was one of the first 300 contributors to the plant database!
Garden Ideas: Level 2 Plant Identifier Raises cows Roses Farmer Celebrating Gardening: 2015
porkpal
Jun 23, 2018 9:24 PM CST
I am so glad not to have Japanese beetles here and still have a healthy population of bees, who were keeping the Crape Myrtles humming this morning.
Porkpal

Toolbelt68
Jun 25, 2018 2:47 PM CST
Rose-Guy, from what I've read on these forums most people just squish the little green worms that hang out on the leaves. They can be found next to the cane where a new branch is growing, under the leaves, or busy eating away. Knocking them off onto the ground won't help as they just climb back up. I find them mostly on new growth so look there first. The more you remove the less flies….That's my 2 cents on the subject….

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