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Soil Testing
and Plant Diagnostic Services
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Plant Diagnostic Clinic
573-882-3019
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Several samples of white pine have been submitted to the clinic this spring and summer with needles on the new branch tips having died back while the stem itself remains green. Several reports indicated damage worse on the south side of the tree, and mature needles generally with a normal appearance throughout the tree. In some cases symptoms were not noticed until the end of May or early June. Diagnosticians and other tree experts across the midwest are reporting similar symptoms, and believe it to be a delayed effect of the late spring cold snap that occurred in early April. In some states it's also being attributed to an abrupt change from moderate temperatures to hot, dry, windy weather. Variation in the damage could be blamed on genetic, site, and microclimate factors.
White pine is not native to Missouri , and much of our soil is heavier and more poorly draining than is optimal. The climate can also be difficult, due to moisture and temperature fluctuations. However, white pine is generally not prone to serious foliar diseases in Missouri .
Other things to keep in mind are that white pine prefers:
Avoid soil compaction and root injuries.
Updated 6/29/07
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