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http://tree-species.blogspot.com/2009/09/spruce-pineapple-or-pseudocone-gal…

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Exploring the World of Trees

Spruce Pineapple or Pseudocone galls

September 20, 2009

"Pineapple" or "Pseudocone" galls occur on several species of Spruce trees including; Norway, Sitka, Englemann and Colorado blue. They are a chemically induced growth distortion caused by a small aphid like insect called a "Pineapple gall adelgid" that Read more…