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What are these grubs and should I be concerned?

 
Posts: 50
Location: New Hampshire, USA zone 5/6
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Today I was puttering in the garden and noticed a few small worms next to my sage bush. When I lifted the sage bush up I found there were dozens of these worms. I don’t know what type of worm they are and if I should be concerned

I imagine since the bush is on top of a retainig wall they are gathering here for warmth, but can’t say for sure.

I hope someone can give me a bit more solid ideas of what to think. I’ve hopefully managed to attach a few pics here. I have a video but when i tried attaching it i got an error message because its a .mov file. Oh well.
mystery-worms.jpeg
[Thumbnail for mystery-worms.jpeg]
what-are-these-grubs.jpeg
[Thumbnail for what-are-these-grubs.jpeg]
 
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Location: Left Coast Canada
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Interesting grubs.  Sorry, I don't recognize these guys.

I have the hardest time telling grubs apart.  If I meet a grub I don't recognize I take a handful of them and whatever I think their 'food' might be (in this case soil and leaf litter) and place them in a jar with a find mesh cheesecloth tied tightly to the top.  Bring them in the house where it's warm and they quickly grow to their adult stage and I can tell what they are.

 
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I think they're possibly cutworms which is a name used for a number of species of moth larvae. If they are indeed cutworms, they are the enemy to anyone growing crops. One solution is chickens and they will gladly scratch around and gobble up those grubby worms and turn them into delicious eggs.
 
Posts: 64
Location: Callisburg Texas
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They look alot like bag worms. Im sorry I have no pictures nor do I know what the actual name is but they like pecan trees. Maybe they are some cousin to them. Nonetheless I would try to get rid of them.
 
Posts: 137
Location: Maritimes , Eastern Canada
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I agree with Tommie, they look like "bag worms" , we call them "tent caterpillars"    , they have likely overwintered there , haven,t seen that before.  I grub is typically white and under ground . These are grey with a small black head , typical caterpillar .

Hate to sound cruel , but put them out where the birds can get them or destroy them somehow as they will make tents(bags) in your trees and shrubs and eat as much foliage as they can.

You probably had some in your trees last season for these to be there.
 
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Whatever they are, I have 8 hungry chickens that would love to come over for a brief visit!  The problem is the solution.
 
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