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1. Will my tree die from the larvae eating all the old growth needles?

No, your tree should still survive because the new growth is not being harmed. This will only be a setback and possibly stunt the growth of the tree. Be aware though, of other factors that can add to this current stress and push a tree past the stage of coming back.


If a tree is severely defoliated, take precautions to make sure the tree is not stressed further this summer by drought or other pests. Water severely defoliated trees and check periodically for other pests or insects that could potentially harm this year's current needle growth.

2. How long does the feeding last?

The larvae stage occurs from early-May through mid-June, but may go longer or shorter depending on how the previous winter was (i.e. amount of snow, temperatures, etc.)

3. Will this be a problem next year?

The likelihood of this reoccurring is rather high. Prepare by looking over current year's needle growth for signs of eggs (white spots). Prune or pluck these needles off to prevent hatching and feeding. Another option is to check in late-April for signs of larvae and to control the populations early on with a strong liquid dish soap and/or pressure spray.

4. Will needles re-grow?

No, once a needle is cast or shed from the branch it will not re-grow a new needle in that spot. The only new growth that will occur is at the tips of branches. Your pine might look a little bare for a year or two until a couple cycles of needle growth have filled in.