Yellow/Brown Crowns on your Pine Trees around Long Lake?
Wondering what is causing the yellow to reddish brown patches in the upper crown of your Red Pines, also known as Norway Pines? One of our members in Neighborhood #5 discovered this was caused by the pine bark beetle, a native MN beetle. More than 60 trees had to be removed, from 3 properties.
The DNR Park Rapids Area Forestry was his first point of contact when he noticed reddish brown discoloration of the needles and a large amount of pine pitch on the bark of some trees. A DNR consultant forester did further analysis with the landowner. Then a tree service was engaged to remove the trees and safely dispose of them according to DNR guidelines, so as to not infect other pine trees:
|Pine Bark Beetle|
For an historical study of pine bark beetles, including examples of the devastation caused in Colorado, visit: Bark Beetle Blues
Should the weather pattern of drought conditions like the summers of 2012 and 2013 begin again, the DNR Forestry suggests using a soaker hose in the drip area of these trees, so that one inch of water would be received on a weekly basis by the tree. Watering helps keep the trees healthy, less stressed and better able to resist the pine bark beetle. [MN DNR Pine Bark Beetles Brochure.pdf.] Fortunately, there has been adequate rainfall so far this summer.