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Mottled willow borer

Mottled willow borer

Cryptorhynchus lapathi

A species of Cryptorhynchus, Also known as Willow beetle, Poplar-and-willow curculio

Cryptorhynchus lapathi is a species of weevil native to Europe. Its common names include poplar and willow borer, osier weevil, and willow weevil. This weevil has long been known as a pest insect of willows cultivated for basketry.

General Info About Mottled willow borer
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Attributes of Mottled willow borer
Colors
Black
Yellow
Bronze
Habitat
wetland margin; damp woodland; fenland; poplar; alder; birch
Adult Food Sources
Willow bark and leaves, poplar bark and leaves
Larva Food Source
Willow wood (salix species), poplar wood (populus species)
Biting/stinging
Not reported
Allergy-causing
Not reported
Defensive attack
Not reported
Venomous
Not reported
Non-poisonous
Not reported
Borer
Not reported
Biting animal or pet
Not reported
Mouthparts Type
Chewing mouthparts
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Species Status of Mottled willow borer
Widespread
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Distribution Area of Mottled willow borer
Europe
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Life Cycle of Mottled willow borer
Egg After oviposition, the eggs of mottled willow borer are typically oval and minute. They're laid in clusters on the host plant, remaining static and vulnerable to predation. The color can blend with the environment, providing some camouflage.
Larva The mottled willow borer larvae are grub-like and legless, with a strong appetite for plant material. Growth is characterized by a series of molts, increasing in size with each stage. They are generally paler than adults.
Pupal The pupal stage is a transitional phase where mottled willow borer is enclosed in a cocoon-like structure. It's inactive and appears dormant; however, significant internal transformation is occurring. The shape slowly resembles the adult form.
Adult Emerging from the pupa, the adult mottled willow borer’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 Mottled willow borer Larvae
Birds, small mammals, predatory beetles, spiders
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Scientific Classification of Mottled willow borer
Tips for Finding Mottled willow borer
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Adult Habitat of Mottled willow borer
Forests and Woodlands
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Habitat Preferences of Mottled willow borer Through Different Life Stages
Adult mottled willow borer prefer to colonize decaying or weak willow trees, especially targeting the bark and trunk. In search of larvae, one needs to inspect the inner bark and cambium layer, as they burrow and feed within these tissues. Pupae can typically be found within protective cocoons made in the surrounding wood or in the soil at the base of infested trees. Seeking out eggs involves carefully examining the crevices of bark on willow trees, where the eggs are discreetly inserted. Each developmental stage of mottled willow borer thus presents a distinctive habitat preference, from egg-laying sites in tree crevices, larval burrows in the inner layers, pupation niches in wood or soil, to the adult's affinity for bark and trunks of compromised willows.
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How and Where Can You Find Mottled willow borer at Different Life Stages
Larva Mottled willow borer larvae can often be found burrowing in their host plants, typically trees or shrubs. Look for signs of infestation or damage on the plant such as holes, frass, or wilting.
Pupal Mottled willow borer pupae are typically located within a cocoon of debris and host plant material, often close to where the larval stage has developed. They may be found within the soil at the base of the host plant or in a concealed location on the plant itself.
Adult Mottled willow borer adults are most visible and may be found on or near host plants. They can be lured using bait traps or spotted during a visual search by examining the trunks, branches, and leaves of potential host plants during suitable weather and time of day.
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Harmful Effects of Mottled willow borer
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Agricultural Pests

In larval stages, mottled willow borer burrow into the stems and roots of willows and poplars, disrupting water and nutrient flow. Mild attacks may weaken plants, while severe infestations can lead to plant death, impacting both ecosystem balance and economic interests in areas where these trees are cultivated.

More Effects of Mottled willow borer

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