Steve Munson The Brown Spruce Longhorn Beetle (Tetropium fuscum (Fabricius); BSLB) is native to northern and central Europe, western Siberia and Japan (CFIA, 2016). 1967. By the second autumn, most of the needles may have been lost and, for a year or two, the tree will have a reddish appearance from a distance due to the colour of the small, bare twigs. Leptographium abietinum was the most commonly isolated blue stain fungus for both beetle species. Hard, J.S. Outbreak populations - which may develop when such food and breeding materials are ample - can then surge into apparently healthy trees and stands. They seem to like spruce trees.  White spruce and Engelmann spruce are the principal hosts (Wygant and Lejeune 1967). forests. “The beetles are more likely to infest a trap tree than standing trees, so this technique can greatly reduce spruce beetle attacks on healthy trees nearby.” The project is also being done to reduce the risk of future wildfires in areas of urban development and to better the overall health of local forests. Disponible au : Centre de foresterie des Grands Lacs. Western North American Naturalist, 2010. For the Omineca Region, just over 354,000 hectares was impacted by spruce beetles in 2019. The brown spruce longhorn beetle (BSLB) is an exotic pest that affects spruce trees. Cottrell, C.B. About 6 galleries per 929 cm2, each about 12.5 cm long and parallel with the grain of the wood, are made in the inner bark, and 3 to 4 groups of eggs are laid along the sides of the galleries, about 100 eggs per gallery. Gov’t Can., Can. The spruce beetle, Dendroctonus rufipennis, is the most destructive pest of mature spruce trees in British Columbia. At low population levels, the spruce beetle prefers weakened or decadent trees and downed host materials such as windfall, logs, and logging residue. Shortly after, they will return to feeding and mating and start the cycle all over again. Infected trees have red needles at the crown. ... Illinois, New Jersey, Massachusetts, Ohio and Ontario, Canada. Rep. PNW-188. The spruce beetle, Dendroctonus rufipennis (Kirby), is the most significant natural mortality agent of mature spruce. Pine beetles of all kinds – including the Western, Southern and mountain pine beetle – attack weak trees. The spruce beetle is native to British Columbia and is regularly seen in forested areas, but higher-than-normal populations have been detected in the Omineca region.  The beetles are attracted strongly to blowdowns, cull logs, and freshly-cut logs. The insect has a 1-, 2-, or 3-year life cycle, with 2-year being the most common, in which the flight and attack period starts in June or soon after most of the snow around the trees has melted. Adult: Robust and cylindrical, about 6 mm long. Outbreaks of the spruce beetle often originate from areas with blowdown, logging slash, or damaged standing timber. Black Long Horned Spruce Beetle This is the most common beetle encountered in the Spruce forests of Interior Alaska, and certainly the ONLY beetle we have of anywhere near this size. There usually are long intervals between such events as insect and disease epidemics and wildfires, giving spruce forests time to … When these twigs fall, the trees are less conspicuous. Rep. 23. Res. Seasonal activity of the native elm bark beetle, Hylurgopinus rusipes, in central Ontario (Coleoptera: Scolytidae). 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