ID Bugs On Roses Please?

 

Found two yesterday, and just found another one on a different bush today.
The bug is quite big and conspicuous- about 5mm or so long. It has wings.
The head and upper body are black, the lower body is bright orange and soft;
if I squash one, it appears to be orange inside(!) like a sac of soft orange
stuff.

They appear to travel down the stem leaving a black stripe- either cutting a
stripe or laying eggs in a line inside(?), can't easily tell.

Any idea what they are, and if so, are they harmful? I've never seen one
before, but then I've never been a rose gardener before, kind of thing. Any
ID gratefully appreciated.


Ian

 



"Ian B"  wrote...

Sounds like the Rose Slugworm or Rose Slug-sawfly. the lavae are
yellow-green and caterpillar shaped and will eat the top of the leaf. This
Sawfly does not roll the leaf or, usually, eat the underside of the leaf
unlike a lot of other Sawflys.
Confirm it by checking the photos on...
http://bluewisteria.co.uk/pest/pest_search.php?theBug=Rose+sawfly+larve
--
Regards
Bob Hobden
W.of London. UK

 

Bob Hobden wrote:

Thanks Bob, that looks like the chappie!

Should I remove and destroy those areas that have been "striped" by the
sawflies? Are they lines of eggs?


Ian

 



"Ian B"  wrote

I doubt you would get them all so I would use a spray idc when the larvae
first emerge and keep an eye on it.

--
Regards
Bob Hobden
W.of London. UK

 

Bob Hobden wrote:

Thanks Bob, any particular spray? What is "idc"?


Ian