Western White Pine Recovery from Cold Damage

After a cold snap in November 2014, we observed widespread and severe needle mortality in western white pines. This update describes the extent of damage and recovery of affected seedlings and trees. 

Western White Pine Recovery from Cold Damage - MPG North UpdateWestern White Pine Recovery from Cold Damage - MPG North Update

In January, needle damage approached 100% on this sapling.

For 39% of the saplings, the cold snap caused little observable damage.

None of the saplings had died, but 19% lost their growth leaders and sustained heavy needle and branch mortality

The cold snap damaged most seedlings in the 2013 seedling cohort. None of the seedlings died, but 55% of the growth leaders perished.

 

The white pine endophyte research plots were planted in 2010 and also contain hybrid and wild type seedlings.

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