If you pluck a needle and roll it between your fingers, you will notice it has four distinct sides. Description: A microscopic roundworm (the nematode, Litylenchus crenatae) has been consistently associated with symptoms, but the role of the nematode and other microorganisms in the proposed disease complex is not fully understood. Hosts:Oaks; symptoms are more severe on species in the red oak group (oaks with pointed leaf tips). The females create wispy, woolly ovisacs. Also has images of the trees for identification and links for further tree species education. Nearest Known Occurrences: Lamoille County, Vermont, also found in eastern New York and northern Pennsylvania. People ate the chestnuts, too, scooping them up by the sackful every Fall. The disease persists for long periods of time in white oak group oak trees (rounded leaf tips) causing noticeable but less-severe symptoms and an overall slower tree decline. New York City area in New York and adjacent areas in New Jersey. Damage to oak trees via pruning or otherwise during the growing season should be strictly avoided in areas where the oak wilt pathogen is present. Seasons: Due to the life-cycle of hemlock woolly adelgid, work should be conducted in hemlock in late-summer through winter. Damage:  Wilted foliage eventually turning from dark green, to light green, to yellow and then red. Bureaus & Programs → Maine Forest Service → About Us → Forest Health & Monitoring → Invasive Threats to Maine's Forests and Trees, Report Suspected Findings in Maine to: Decline may be more rapid in the presence of elongate hemlock scale (described below). Laboratory tests are necessary to confirm this species as the cause of disease. It has more upright branching than balsam, does … They start off purple, then turn brown in fall. And barely 100 miles from Rimouski sits Maine, which is no stranger to battles with the native pest: In the 1970s and 1980s, a major outbreak of spruce … Where to look: Planted hemlock, spruce and fir. Nearest Known Occurrences: Red pine scale was detected in Mount Desert, Hancock County, Maine in September 2014. Image: Jim Chatfield, OSU. Both beetles carry spores from infected to healthy trees. Most recognizable stages of the insect are covered in white, waxy, wool like material. Nearest Known Occurrences: The Asian longhorned beetle has been detected in Worcester and Boston Massachusetts (More Information). Spruce trees can be native to Asia, North America, and Europe, preferring cooler climates and struggling in hot temperatures or high humidity. Spruce trees are native to cold and temperate regions of the Northern Hemisphere. Maine Tree Growers is a small company that grows and sells balled and burlapped trees for the landscaping market in Maine. Spruce trees grow in a similar shape to fir trees and they are difficult to identify by shape alone. As the disease progresses, buds are aborted in greater numbers leading to reduced canopy and tree death. Davey uses cookies to make your experience a great one by providing us analytics so we can offer you the most relevant content. Ash: Black, Green and White Aspen (Poplar): Balsam, Bigtooth, and Quaking Basswood: American Beech: American The cones have scales, and they’re about 4-6 inches long, which is the largest cone size among spruce trees in the US. Growing straight and tall they were prized for timber. Description: Red pine scale is one of the Matsucoccus scales, a soft scale. Damage: Needle mortality, crown thinning, tree decline and mortality. Spruce pulp is important in the paper industry, and several species are cultivated for their attractive forms. Trees To Please is a nursery, garden center and Christmas tree farm, growing and selling Maine native evergreens, flowering annuals, perennials, fall mums, shrubs and shade, ornamental and fruit trees. The two featured here do their damage as larvae. Description: Dark metallic blue wasp-like, robust insect without a defined waist, with a spear-shaped plate at the tail end. Still not sure what type of tree you have? Winter webs on the outside edges of host crowns are conspicuous, tightly woven clusters of skeletonized leaves silk and sometimes fruit, filled with tiny larvae and frass. A single egg or crawler can start a new population of hemlock woolly adelgid. Slow to establish after transplanting; good medium-sized tree White spruce, Cat spruce Picea glauca. Nearest Known Occurrences: Canker damage occurs in California and Oregon. 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