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Fruit & Orchards

Help identify pest on grape leaf

7 years ago

I found a few Concor grape leaves with small areas eaten (skeletonized) and webbing present. The wormy things are very tiny and look translucent. If you look at the bottom of the eaten area in the above photo, you can spot one.

Can you help me ID these? Since they are a soft bodied caterpillar type, is Bt my best choice for control? Would you pick off damaged leaves with webbing and eggs and destroy them if there aren't very many leaves affected yet?

thanks!!

KS

Featured Answer

Konrad..just outside of Edmonton Alberta

7 years ago

Not sure what these little larva are and will do...no damage or worry so far, perhaps let them be and see a little later, perhaps cut off the leaves and put into a box to be separated from the plant.

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Comments (8)

PRO
The Logician LLC
7 years ago
There is no typical skeletonizing in your images.

The common Grape Leaf Skeletonizer is not associated with webbing, so your caterpillars may be Leaf Tiers or Leaf Rollers, too small yet to deform the leaves. In any of the above, Bt would be effective. The adult moth that layed the eggs may well be done for the season, so picking off the leaves might be the end of it.
Jean
7 years ago
The damage is old, not ongoing.
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Tim Walker
7 years ago
I have it on my himrod grapes. I did nothing. It did not affect the quantity or quality of the harvest
KSprairie
Original Author
7 years ago
Thank you all for your input. Glad to hear it is not going explode into a major problem! I will remove the damaged leaves but put a few in a box as Konrad suggests... Might be interesting to find out what these little guys grow up to be.
clarkinks
7 years ago
last modified: 7 years ago
The pest you want to be careful of with fruit trees is tent catepillars. They can defoliate a tree in a hurry and are very common here in Kansas. they don't typically pick on grapes.
KSprairie
Original Author
7 years ago
Clarkinks, thanks for the photo. I will watch for them on my trees. I have found a half dozen or more leaves with worm damage on my grapes, so they don't appear to be multiplying very quickly. I did get them sprayed with Bt, but probably missed some. Thanks!
clarkinks
7 years ago
last modified: 7 years ago
Glad to help out

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