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White pine weevil

White pine weevil

Pissodes strobi

A species of Pine weevils

The eggs are laid inside a tree, usually white pine, Sitka spruce, white spruce, Engelmann spruce, or other pine or spruce, and the offspring feed on this tree until the host is killed.

General Info About White pine weevil
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Attributes of White pine weevil
Colors
Brown
Black
White
Habitat
spruce; pine
Adult Food Sources
Conifer needles, pine bark, pine shoots, pine twigs, conifer buds
Larva Food Source
Conifer phloem, conifer cambium, pine bark, pine shoots, pine twigs
Biting/stinging
Not reported
Allergy-causing
Not reported
Defensive attack
Not reported
Pest-Eating Predatory
Not reported
Phytophagous
Not reported
Predatory
Not reported
Biting animal or pet
Not reported
Mouthparts Type
Chewing mouthparts
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Species Status of White pine weevil
It is widely distributed in the Northern Hemisphere, its distribution mirroring that of plants in the Pinaceae, the pine family, which includes most of their host trees.
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Predators of White pine weevil Larvae
Birds, mammals, predatory insects, spiders
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Predators of Adult White pine weevil
Birds, rodents, predatory insects, spiders
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Interesting Facts About White pine weevil
White pine weevil communicates through an intricate system of chemical signals to locate mates and synchronize their invasion on host trees.
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Scientific Classification of White pine weevil
Tips for Finding White pine weevil
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Youth Habitat of White pine weevil
Forests and Woodlands
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Habitat Preferences of White pine weevil Through Different Life Stages
Eggs of white pine weevil are generally found on the bark of host trees, especially pines. Larvae burrow into the cambium layer, making precise search difficult, but examining the trunks of young pine trees is a good start. When searching for pupae, look for them within chambers in the wood, beneath the bark. Adults are easier to find on the surfaces of pine trees or on foliage, most active during the daytime, making visual search feasible in pine forests or areas with host trees.
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When is the Best Time to Observe White pine weevil
The best time to find adult white pine weevil is during late spring and early summer when they are most active, typically during the warmer parts of the day.
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What is the Best Weather to Observe White pine weevil
Searching for white pine weevil is preferable on dry and sunny days, as these conditions are optimal for their activity, especially when looking for adults that may be feeding or seeking mates.
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How and Where Can You Find White pine weevil at Different Life Stages
Larva Larvae of white pine weevil are typically found inside the bark or wood of their host plants. To find them, inspect dying or recently dead conifers, particularly pine trees, for signs of infestation like holes or sawdust. Carefully remove pieces of bark to locate the grubs.
Pupal Pupae of white pine weevil can be found in similar locations as the larvae, within the woody tissues of their host plants. To locate them, one would continue to carefully check under the bark or in the wood of infested trees.
Adult White pine weevil adults are often found on the bark of host trees. To increase your chances of finding white pine weevil, seek out weak or stressed pine trees. Adult white pine weevil can be observed crawling on the bark surface, or by setting up traps baited with attractants such as host plant odors and pheromones.
Are White pine weevil harmful?
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Harmful Effects of White pine weevil
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Forestry Pest

White pine weevil infestation can cause varying levels of harm to coniferous forests. In small numbers, adults bore into stems to lay eggs, and emerging larvae feed, creating galleries that can disrupt nutrient flow. In large numbers, this activity can severely weaken trees, leading to reduced growth and even death, with potential economic impacts on forestry industries.

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Agricultural Pests

When white pine weevil infest conifers in large numbers, they pose a severe threat, boring into stems and disrupting nutrient flow. In mild infestations, the impact is less pronounced but can lead to stress on the trees. Such damage not only hampers the lumber industry but also disrupts ecosystems, potentially affecting humans through ecological imbalances.

More Effects of White pine weevil

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