Posted on Wednesday, July 11, 2007 - 03:50 pm EST :
Sawfly (Nematus ribesii.) I get them on my Gooseberries every year. You need to deal with them quickly as they will defoliate you rose incredibly fast. I use Derris dust as I am organic but you could use a systemic.
Growit- Hampshire, Zone "8/9"
Thank you for your response. I've been picking and squishing and also trimming and trimming. Hope to get them under control soon.
Craftygardener- Ontario, Zone "5b Canadian"