Please help identify this pest!

slim2169June 5, 2013

We have white caterpillars all over our creeping jenny in the front garden and it's slowly killing it all. What is this thing?

Thank you for reporting this comment. Undo
rhizo_1 (North AL) zone 7

That's the Lysimachia sawfly larva, not a caterpillar. I've always found sawflies easy to control with commercial insecticidal (horticultural) soap. Spray when you see that these insects are most active, avoid sunny days.

    Bookmark   June 6, 2013 at 4:34AM
Thank you for reporting this comment. Undo

In some places Creeping Jenny is considered a noxious "weed" while other places and people consider it a good ground cover.
Sawflies, wasps not flies, probably will not "kill" your Creeping Jenny, although a large invasion of the larva can weaken plants so they are susceptible to other problems. Insecticidal Soaps can, when applied early enough in the life cycle, help control them and Insecticidal Soaps containing pyrethrins may be of some helps later, but then why use the soap since it is the Pyrtethrin that does them in. Spinosad also can be used but that is very toxic to bees (as is pyrethrin) so due care in use is necessary.

Here is a link that might be useful: Sawflies

    Bookmark   June 6, 2013 at 7:09AM
Thank you for reporting this comment. Undo
ken_adrian Adrian MI cold Z5

bugs rarely kill a plant outright ...

and CJ is aggressive enough.. that i would not even bother eradicating them

besides the fact ... it will pupate very soon.. if that is near one inch ...

they will be gone soon ... and the aggressive plant will outgrow the damage ...

i wouldnt bother ...

now.. if it were a $100 conifer... i might go after them .. but not on this horribly invasive weed yeah.. i have a predisposition to hating CJ ...

it isnt worth the time, effort, nor cost.. IMHO ...


    Bookmark   June 6, 2013 at 8:05AM
Thank you for reporting this comment. Undo

Thanks everybody for your input, I really appreciate it!

    Bookmark   June 6, 2013 at 9:47AM
Sign Up to comment
More Discussions
Pepper problem
I am a doctor and gardening beginner, trying my luck...
Rabbit catch and release
I've researched all options for removing the rabbit...
Best organic pesticide for house plant soil?
Best organic pesticide for house plant soil? I currently...
problem with skunk cabbage
My Eastern skunk cabbages aren't doing so well. I believe...
Help! My Coleus Has Yellowing, Dying Leaves
I have an unknown variety of coleus; spent last summer...
Sponsored Products
Illumine Path & Landscape Lights 1-Light 3 W Low Voltage Raw Copper Pathlight
Home Depot
Madras Dyed Rug 6' x 9' - LIGHT GREEN
$3,299.00 | Horchow
Foscarini | Diesel Collection Fork Piccola Suspension Lamp
$764.00 | YLighting
Illumine Wall Mounted 1-Light Outdoor LED Matte Bronze Step Light with Large
Home Depot
Traditional 17 x 3 Column Radiator Cast Iron Style White 23.6 x 31
Hudson Reed
Star Dust Polished Glass Pencil Liners
$9.95 | TileBar
SensorPedic Gusseted Bed Pillow - Set of Two
$34.99 | zulily
Peri Opal Matte Bronze Sconce
$166.50 | Bellacor
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™