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As a comment about Dwarf Alberta Spruce (Picea glauca var. albertiana 'Conica'), Paul2032 wrote:

Dwarf Alberta Spruce are widely planted in landscapes here in Utah. Its scientific name is Picea glauca 'Conica'. It is a sport of the white spruce, Picea glauca. As the Alberta Spruce matures, a part of the plant may revert to the white spruce, which spoils the conical form.. They are plagued by spider mites here, which make the needles turn brown and drop. One of the best ways to deal with this is washing the shrub with a hard stream of water on a regular basis.
Name: Evan
Pioneer Valley south, MA, USA (Zone 6a)
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eclayne
Feb 11, 2013 9:30 PM CST

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Thanks for the tip Paul. I've been battling spider mites for years.
Evan
Name: Paul
Utah (Zone 5b)
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Paul2032
Feb 12, 2013 2:58 AM CST
Some of the Miticides work but use of them also kills beneficial predatory mites so I haven't used them.
Paul Smith Pleasant Grove, Utah

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