How to tell good grubs from bad?

nygardener(z6 New York)April 23, 2010

As I've been preparing my beds, I keep digging up little grubs of various thicknesses and colors. I've been killing them, figuring that for all I know they're Japanese beetles or other garden pests, but it seems to me that some might be beneficial  for example, ground beetles are supposed to be slug-eaters.

Actually, I've only found about a dozen, so my efforts probably aren't making much difference either way.

So how do I tell which to kill and which to keep?

Thank you for reporting this comment. Undo
jean001(z8aPortland, OR)

If you can post some good views, we can help you ID them.

    Bookmark   April 23, 2010 at 6:45PM
Thank you for reporting this comment. Undo
nygardener(z6 New York)

Hmm, good idea. Good excuse to go buy a macro lens!

    Bookmark   April 23, 2010 at 7:24PM
Thank you for reporting this comment. Undo
tdscpa(z5 NWKS)

Good grubs? Never heard of such. What do they do for you?

    Bookmark   April 24, 2010 at 3:23AM
Thank you for reporting this comment. Undo
rhizo_1 (North AL) zone 7

Ground beetle larvae would not be described as a 'grub'. Grubs are the larvae of a wide assortment of scarab beetles, some of which may be beneficial, or at least may not be considered too much of a pest.

Yep, pictures would help for sure.

    Bookmark   April 24, 2010 at 7:26AM
Thank you for reporting this comment. Undo

There is a way of telling which Scarab Beetle those grubs came from that involves counting the hairs they have, but generally grubs produce things like June Beetles and Japanese Beetles, among others.
The larva of Ground Beetles looks much different.

    Bookmark   April 26, 2010 at 7:25AM
Sign Up to comment
More Discussions
I am not a novice gardener, and yesterday I applied...
Hi guys, I have had whitefly interfering with some...
Acacia invaded by Caterpillars!
My wife and I don't know what to do. We have a small...
A rabbit! Argh!
Of all the problems I expected in a suburban dessert,...
ID please
Found a bunch of these crawling around my rain barrel....
© 2015 Houzz Inc. Houzz® The new way to design your home™