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Nursery Forum & Plant Health
Eastern White Pine (Pinus Strobus)
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<blockquote data-quote="Greenie" data-source="post: 7765729" data-attributes="member: 2508"><p>If you want the trees to grow straight be aware of pine weevils - they'll attack the top leader, killing it. With the top leader dead the tree will continue to grow with a deformity in the stem. Much of the growth will be outward rather than upward. The trees are most susceptible when small. Pruning or damaging the leader will have the same effect - a deformity followed by invigorated outward growth. Control is tough - You can spray insecticide on a few trees you want to try to protect but it's hit and mostly miss for me as timing is critical and rain washes the insecticide off. Here's an article <a href="https://extension.psu.edu/white-pine-weevil" target="_blank">https://extension.psu.edu/white-pine-weevil</a></p></blockquote><p></p>
[QUOTE="Greenie, post: 7765729, member: 2508"] If you want the trees to grow straight be aware of pine weevils - they'll attack the top leader, killing it. With the top leader dead the tree will continue to grow with a deformity in the stem. Much of the growth will be outward rather than upward. The trees are most susceptible when small. Pruning or damaging the leader will have the same effect - a deformity followed by invigorated outward growth. Control is tough - You can spray insecticide on a few trees you want to try to protect but it's hit and mostly miss for me as timing is critical and rain washes the insecticide off. Here's an article [URL]https://extension.psu.edu/white-pine-weevil[/URL] [/QUOTE]
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