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Thistle bud weevil

Thistle bud weevil

Larinus carlinae

A species of Larinus

The thistle bud weevil (Larinus carlinae) is easily identified with its darker color and its unusually large "bug nose." This "nose" is used to access thistle buds, its primary focus on feeding. Their eggs are laid in these buds, where their larva will destroy seeds. In Canada, this weevil is used as a biocontrol agent against the Canada thistle, which is considered a noxious weed.

General Info About Thistle bud weevil
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Attributes of Thistle bud weevil
Colors
Black
Yellow
Habitat
weedy area
Adult Food Sources
Floral resources of carduus species, pollen, nectar, seeds of carduus species, leaves of host plants
Venomous
Not reported
Non-poisonous
The Thistle bud weevil is non-toxic and generally doesn't pose a risk to human health. No need for excessive worry.
Borer
Not reported
Pollinator
Not reported
Pest-Eating Predatory
Not reported
Phytophagous
The Thistle bud 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 Thistle bud weevil
It is native to Europe, it is also common in North America. It was accidentally introduced to Canada and the United States in the 1960s.
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Distribution Area of Thistle bud weevil
Throughout North America
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Life Cycle of Thistle bud weevil
Egg In the egg stage, the thistle bud weevil is oval and minute, usually laid in clusters. The color ranges from translucent to a light hue, providing camouflage. At this stage, the thistle bud weevil is immobile and growth occurs internally.
Larva During the larval stage, the thistle bud weevil exhibits a worm-like appearance, with a soft, elongated body, and may possess vibrant markings. Feeding voraciously, it increases in size, molting several times to accommodate its growing body.
Pupal The pupal stage is a transitional phase where the thistle bud weevil remains motionless, often encapsulated in a cocoon. The thistle bud weevil undergoes significant transformation, with tissues reorganizing. Color and shape are obscured, indicating the metamorphosis within.
Adult Emerging from the pupa, the adult thistle bud 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 Adult Thistle bud weevil
Birds, rodents, lizards, spiders, insectivorous mammals
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Interesting Facts About Thistle bud weevil
Adult thistle bud weevil are known to play dead as a defense mechanism when threatened, tucking in their legs and falling to the ground to evade predators.
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Scientific Classification of Thistle bud weevil
Class
Bugs
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Order
Beetles
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Genus
Larinus
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Tips for Finding Thistle bud weevil
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Youth Habitat of Thistle bud weevil
On and Within Other Organisms (Parasitic and Symbiotic Relationships), Agricultural and Cultivated Areas
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Adult Habitat of Thistle bud weevil
Grasslands and Prairies, Agricultural and Cultivated Areas
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How Can You Attract Thistle bud weevil
For adult thistle bud weevil, traps with pheromones or host plant material can be used as lures, as these creatures are often drawn to substances indicative of food sources or mating opportunities.
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What is the Best Weather to Observe Thistle bud weevil
Weather conditions that are mild and humid, without being excessively wet or dry, would be most suitable for locating thistle bud weevil, as extreme conditions can drive them into hiding or dormancy.
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How and Where Can You Find Thistle bud weevil at Different Life Stages
Larva Thistle bud weevil larvae typically feed on plant roots or stems and can be found by carefully digging around the host plant's base or by inspecting the underside of leaves if they are leaf miners.
Pupal Thistle bud weevil pupae are usually formed in the soil or leaf litter near the host plant. They can be discovered by gently sifting through the top layers of soil or by examining the leaf litter for any signs of pupation.
Adult Adult thistle bud weevil can be found on or near their host plants, feeding or mating. Look for these beetles by visually inspecting the plants they are known to associate with, paying attention to leaves, flowers, and stems for any signs of the adults.
Are Thistle bud weevil harmful?
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Harmful Effects of Thistle bud weevil
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Agricultural Pests

The larvae of thistle bud weevil bore into thistle tissues causing damage that ranges from mild to severe. Infested plants may exhibit stunted growth, reduced flowering, or wilted stems. A high pest population can lead to significant thistle decline, indirectly benefiting agricultural practices by reducing the presence of this weed.

More Effects of Thistle bud weevil

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