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Monochamus scutellatus, commonly known as the white-spotted sawyer or spruce sawyer or spruce bug or a hair-eater, [1] is a common wood-boring beetle found throughout North America. [2] It is a species native to North America.
A smaller bark beetle often found in spruce is the foureyed spruce bark beetle Polygraphus rufipennis. 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.
The most recent spruce bark beetle invasive outbreaks are found mainly in fallen, diseased or damaged Norway spruce. [7] Healthy trees use defenses by producing resin or latex , which might contain several insecticidal and fungicidal compounds that kill or injure attacking insects. [ 8 ]
Dendroctonus micans, the great spruce bark beetle, is a species of bark beetle native to the coniferous forests of Europe and Asia. The beetles burrow into the bark of spruce trees and lay eggs which develop into larvae that feed on the woody layers under the bark.
Elatobium abietinum feeds by sucking sap from spruce needles, often causing defoliation of older needles and wilting of young growth. The presence of the aphids weakens the tree by decreasing growth rates and making it more susceptible to attack by other pests such as the spruce beetle (Dendroctonus rufipennis). Serious defoliation can kill the ...
Rhizophagus grandis is a species of predatory beetle in the family Monotomidae. [1] R. grandis is a specialist predator on the larvae of the great spruce bark beetle (Dendroctonus micans), a pest of spruce trees (Picea), and is found in Eurasian forests where its prey is found.
Tetropium fuscum, the brown spruce longhorn beetle, is a species of beetle in the family Cerambycidae. [1] It was described by Johan Christian Fabricius in 1787. [1] Tetropium fuscum is native to Europe and Northern Asia, and has been introduced to Nova Scotia, Canada. [2] Brown spruce longhorn is a pest of spruce trees.
The southern pine beetle (Dendroctonus frontalis), a bark beetle, is a major threat to pine trees in the southeastern United States. Its reproductive cycle is controlled by varying ratios of certain natural chemicals, including verbenone. To reproduce, pine bark beetles aggregate in large numbers in their host pine trees.