Dessimated

[BigC]

Can anyone identify these caterpillar like grubs, they have totally dessimated the red berry bush this year....completely stripped all the leaves in a matter of days...Yes I took my eye off the ball....so cut the whole bush back and binned all the grubs....and sprayed what was left......

 

[Chuck]

Can anyone identify these caterpillar like grubs, they have totally dessimated the red berry bush this year....completely stripped all the leaves in a matter of days...Yes I took my eye off the ball....so cut the whole bush back and binned all the grubs....and sprayed what was left......

Looks like Army Worms to me. Spray everything in sight with Bt.

 

[BigC]

I got told they were Saw Fly larvae...sounds about right....I waged war and I have taken back control...mast keep a more watchful eye

 

[Beverly]

They look like Saw Fly larvae to me. Easy to control unless they sneak up on you.

 

[Marck]

Looks like Army Worms to me. Spray everything in sight with Bt.

B.t. (Bacillus thuringensis) will not be effective on sawfly larvae. It only works on caterpillars (Lepidoptera larvae).

Sawflies (Symphyta) are relatives of Ants, Bees, and Wasps (Hymenoptera).
However, Sawfly adults do not sting, unlike many of there more well-known kin.
There are over 8,000 described species of Sawfly.

The sawfly pictured in the OP is the Gooseberry Sawfly (Euura ribesii, formerly Nematus ribesii), in the family Tenthredinidae. This species feeds on the foliage of Currants and Gooseberries (Ribes spp.).
Yes, in large numbers, the larvae can indeed decimate the leaves on a berry bush.
Originally native to Europe, it is now found in many parts of the world where Currants and Gooseberries are grown.