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Nut weevil

Nut weevil

Curculio nucum

A species of Acorn weevils

This distinctive beetle is recognized by its elongated snout, which it uses adeptly to bore into hardwood tree fruits and deposit its eggs. As a larva, it has a pale, legless body, contrasting greatly with its darker, hard-shelled adult form. Its lifecycle is marked by a metamorphosis, where it transforms within the fruit it infests, before emerging to continue the cycle. Its dietary habits evolve from internal fruit tissues in its juvenile stage to leaves and softer plant parts once matured.

General Info About Nut weevil
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Attributes of Nut weevil
Colors
Brown
Black
Yellow
Habitat
Deciduous forest; park; mixed hedge; hazelnut tree
Adult Food Sources
Leaves, nuts, fruit, bark, plant shoots
Larva Food Source
Nut tissues, hazel nuts, acorns, chestnuts, other hard-shelled fruit seeds
Biting/stinging
Not reported
Allergy-causing
Not reported
Defensive attack
Not reported
Venomous
Not reported
Non-poisonous
The Nut weevil is non-toxic and generally doesn't pose a risk to human health. No need for excessive worry.
Borer
The Nut weevil can bore into the wood and may damage its structure, or even harm the health of trees. Stay alert if you frequently observe it in your house.
Pollinator
Not reported
Pest-Eating Predatory
Not reported
Phytophagous
The Nut weevil feeds on plants, usually without causing significant harm. However, it's important to take the situation seriously if their numbers begin to increase significantly.
Predatory
Not reported
Biting animal or pet
Not reported
Mouthparts Type
Chewing mouthparts
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Species Status of Nut weevil
Widespread and common
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Distribution Area of Nut weevil
Europe, south Sweden, Finland, Great Britain, Mediterranean
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Life Cycle of Nut weevil
Egg The egg of nut weevil is oval and minute, typically deposited in clusters. Its creamy to white color helps camouflage it within the environment. Development within the egg encapsulates initial formation of the insect's basic structures.
Larva As larvae, nut weevil display creamy, legless bodies with a distinct head. The larvae focus on feeding and growth, which includes molting multiple times. Their size increases significantly, but they lack adult structures.
Pupal The pupa of nut weevil is a transitional, immobile stage. Encased within a cocoon, the pupa's coloration varies, while its body undergoes significant transformation, restructuring toward the adult form.
Adult Emerging from the pupa, the adult nut weevil’s development is marked by the presence of wings and functional reproductive organs. The body is fully formed and hardened, and the adult is mobile, focusing on reproduction.
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Predators of Nut weevil Larvae
Birds, rodents, carnivorous beetles, ant species, spiders
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Predators of Adult Nut weevil
Birds, rodents, spiders, insectivorous mammals, predatory beetles, lizards
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Interesting Facts About Nut weevil
Nut weevil uses its long snout to drill into nuts, laying eggs inside which later hatch into nut-boring larvae.
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Scientific Classification of Nut weevil
Tips for Finding Nut weevil
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Youth Habitat of Nut weevil
Forests and Woodlands
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Adult Habitat of Nut weevil
Forests and Woodlands
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Habitat Preferences of Nut weevil Through Different Life Stages
The larvae of nut weevil are typically found inside nuts of various trees like hazelnut, developing within the nut until pupation. Searching for the larvae requires harvesting the nuts and dissecting them to find larvae within. Adult nut weevil are found on or near host plants, often on leaves or flowers where they feed and mate. To find adults, one should search on the host trees during the right season, inspecting for insects on leaves or blossoms. Pupae are generally in the soil underneath the host plant, necessitating careful excavation of soil to locate them.
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Harmful Effects of Nut weevil
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Agricultural Pests

The larvae of nut weevil bore into hazelnut seeds, causing internal damage. A mild infestation might go unnoticed, but severe outbreaks can lead to significant crop loss. This can impact local economies and food supply, and increase reliance on pest control measures, potentially affecting human health and the environment.

More Effects of Nut weevil

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