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White-spotted sawyer

White-spotted sawyer

Monochamus scutellatus

A species of Sawyers, Also known as Tar sands beetle, Spruce sawyer, White-spotted sawyer beetle

The white-spotted sawyer (Monochamus scutellatus) is a bronze wood-boring beetle with small white specks. It primarily infests dead or dying wood. It's easily confused with the Asian long-horned beetle, and the only significant difference between the two is that the white-spotted sawyer has a white spot between the top of its two wing covers.

General Info About White-spotted sawyer
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Attributes of White-spotted sawyer
Colors
Black
White
Habitat
forest
Adult Food Sources
Tree bark, twigs, small branches, leaves, phloem
Larva Food Source
Coniferous tree wood, pine, spruce, fir, larch
Biting/stinging
Not reported
Allergy-causing
Not reported
Defensive attack
Not reported
Venomous
Not reported
Non-poisonous
The White-spotted sawyer is non-toxic and generally doesn't pose a risk to human health. No need for excessive worry.
Predatory
Not reported
Biting animal or pet
Not reported
Mouthparts Type
Chewing mouthparts
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Species Status of White-spotted sawyer
It is a species native to North America. It is found throughout North America.
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Distribution Area of White-spotted sawyer
United States
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Appearance of White-spotted sawyer
Adults are large-bodied and black, with very long antennae; in males, they can be up to twice the body length, but in females they are only slightly longer than body length. Both sexes have a white spot on the base of the wings, and may have white spots covering the wings. Both males and females also have a spine on the side of the prothorax.
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How to Identify White-spotted sawyer?

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Predators of White-spotted sawyer Larvae
Woodpeckers, rodents, parasitic wasps
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Predators of Adult White-spotted sawyer
Birds, spiders, small mammals
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Interesting Facts About White-spotted sawyer
White-spotted sawyer larvae create unique acoustic signals by grinding their mandibles to communicate with each other within their host trees.
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Scientific Classification of White-spotted sawyer
Tips for Finding White-spotted sawyer
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Youth Habitat of White-spotted sawyer
Forests and Woodlands, Rotting and Decaying Matter
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Adult Habitat of White-spotted sawyer
Forests and Woodlands
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How Can You Attract White-spotted sawyer
To attract white-spotted sawyer, one might use pheromone traps or bait made from host tree volatiles, as white-spotted sawyer is typically drawn to the scent of weakened or stressed trees within its habitat.
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What is the Best Weather to Observe White-spotted sawyer
Searching for white-spotted sawyer is best done on dry, warm days as they are less active during cold or rainy weather. Additionally, adults are more likely to be found on sunny days when they are often out for mating and feeding.
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How and Where Can You Find White-spotted sawyer at Different Life Stages
Larva White-spotted sawyer larvae can usually be found within the wood of host trees, where they create galleries. Locating infested trees and carefully examining them for entrance holes or sawdust-like frass can lead to finding larvae.
Pupal White-spotted sawyer pupae may still be inside the wood of trees or just beneath the bark. Searching for pupae involves peeling back loose bark or dissecting rotting logs where larvae are known to pupate.
Adult White-spotted sawyer adults can be found on or around their host trees. Look for them on warm, sunny days, especially on damaged or recently dead trees, as the adults lay eggs in the bark crevices.
Are White-spotted sawyer harmful?
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Harmful Effects of White-spotted sawyer
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Forestry Pest

In coniferous forests, white-spotted sawyer larvae bore into stems, interrupting nutrient flow, while adults may spread pine wilt disease. This can lead to needle discoloration, tree wilting, and eventual tree death. Large populations result in severe damage, potentially impacting lumber industries and natural ecosystems.

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Agricultural Pests

Larval stages of white-spotted sawyer boring into stems disrupt the conifer's vascular system, hindering nutrient and water transport. Mild infestations may cause stress, while severe cases can lead to tree death, affecting timber quality and increasing the risk of wildfire spread, possibly impacting air quality and human health.

More Effects of White-spotted sawyer

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