Many plants, especially eastern white pine, are sensitive to salt spray from roadways. Road crews apply sodium chloride and other deicing materials to keep roads clear in the winter. Photo by Bert Cregg, Michigan State University.Ĭonifers located along the road can be damaged by road salt. Environmental – related issues Road salt damage on white pine. Photo by Bert Cregg, Michigan State University. Pine identification left to right: Scots (Scotch) pine, Austrian pine, eastern white pine.
Older Scots pines have orange-reddish bark, whereas the bark on Austrian pines is grey. Scots pines have shorter (1 1/2'” or less) needles and smaller cones than Austrian pines. Hard pines have two or three needles in each fascicle. Austrian pine and Scots pines are part of group known as hard pines along with our native jack pine and red pine. White pines have long (4” or longer), slender cones. The needles are thin and soft and often pale green. White pines have five needles in each fascicle. Determining the number of needles in a fascicle is the first step in identifying pines. Unlike many other conifers, needles on pine trees are clustered together in groups called fascicles. The most common pines in residential and commercial landscapes in Michigan are eastern white pine, Austrian pine and Scots (or Scotch) pine. Depending on the type of pine tree, there are several common causes of needle browning in pines. There are a few cultivars in the trade but they are not commonly sold in garden centers.As spring arrives, we begin to see browning of pine needles in plantations, landscapes and along roadsides.
AUSTRIAN PINE NEEDLE BLIGHT PROFESSIONAL
If this is detected, consult a professional arborist or plant laboratory for disease verification. No special care is needed except to scout for the presence of dead or dying branch tips which might be an indication of Sphaeropsis tip blight. Soil type: Most soils except for poorly-drained soils pH range: Acid to alkaline Functions:Īustrian pine can be used as in mass, in borders, and as a windbreak (for the early part of its life canopy opens with age) Care:
AUSTRIAN PINE NEEDLE BLIGHT FULL
Zone: 3 to7 (will languish in hot portions of zone 7) Light: Full sun
This species is also susceptible to nematodes (microscopic roundworms) which can kill a tree in a single year. If the disease has spread throughout the tree, then the tree should be taken down and all parts removed from the site.
Prevention of drought stress is apparently the best way to avoid this disease removal of infected plant parts and fungicide applications can control the disease spread if the tree is only minimally infected. The disease, which kills the needles (at the tips of branches), starts at the bottom of the tree and makes its way up to the tree Sphaeropsis tip blight will take several years to kill a tree. It is, however, susceptible to an ultimately lethal fungal disease ( Sphaeropsis tip blight formerly Diplodia tip blight). Austrian pine is quite tolerant of poor dry soils and urban conditions (including salt spray). As most other pines, with age this species loses its lower branches and assumes a flat-topped irregular form. Main features: Austrian pine is a medium to large pine tree that is quite dense in its youth (about first 20 years). Shape: densely conical in youth with age more irregular and flat-topped Foliage: About 5 inch long stiff needles 2 needles per fascicle evergreen Height: About 50 feet
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