This super-hot summer also didn't help. Colorado blue spruce is a native to colder areas and doesn't do well in areas hotter than Zone 7. As our climate slides southward (much of the Harrisburg ...

White pine weevil damage on a blue spruce. Q: Some of the tips of my Colorado blue spruce tree are browning and dying. I'm attaching photos.

Spruce trees again are being plagued by gall adelgids, which are small, sap-feeding insects. A tell-tale sign are pinecone-shaped growths, or galls, forming on new shoots of Colorado blue spruce.

Q: Hi Gerald, our five-year-old Norway spruce trees in the backyard have deformed/brown curling leaders. We have seen white worms on them that could be weevils. We … ...

Study reveals how a tall spruce develops defense against hungry weevils Date: July 10, 2023 Source: North Carolina State University Summary: A study has identified genes involved in development of ...