How do Spruce Gall Adelgid larvae react when shucks break and expose new needles?

When shucks break and expose new needles, the larvae of the Spruce Gall Adelgid start to feed on the tender, newly emerging foliage. This feeding is crucial for their growth and development, as the new needles provide the nutrients the larvae need during this stage of their life cycle.

The newly exposed needles are often softer and richer in nutrients, making them more appealing to the larvae. By feeding on these young needles, the larvae are able to sustain themselves and prepare for the next stages of their life cycle. This feeding behavior occurs during a specific time in their development when the food source is most suitable for their needs.