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Nodding thistle receptacle weevil

Nodding thistle receptacle weevil

Rhinocyllus conicus

A species of Rhinocyllus, Also known as Thistle seedhead weevil

The nodding thistle receptacle weevil (Rhinocyllus conicus) earns this name by being a natural biological control agent against noxious thistle plants such as the nodding thistle. She lays hundreds of eggs on the leaves of these plants, grinding leaves up to hide their eggs underneath the plant. Because they can not tell the difference between a good or bad thistle, they aren't used too much anymore.

General Info About Nodding thistle receptacle weevil
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Attributes of Nodding thistle receptacle weevil
Colors
Brown
Black
Habitat
thistle
Adult Food Sources
Carduus nutans (nodding thistle), cirsium arvense (canada thistle), cirsium vulgare (spear thistle), centaurea solstitialis (yellow star-thistle), centaurea calcitrapa (purple star-thistle)
Larva Food Source
Carduus nutans (nodding thistle), cirsium arvense (canada thistle), cirsium vulgare (spear thistle), centaurea solstitialis (yellow star-thistle), centaurea calcitrapa (purple star-thistle)
Biting/stinging
Not reported
Allergy-causing
Not reported
Defensive attack
Not reported
Venomous
Not reported
Non-poisonous
The Nodding thistle receptacle 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
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Species Status of Nodding thistle receptacle weevil
It is native to Eurasia and North Africa. It was introduced to the United States.
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Distribution Area of Nodding thistle receptacle weevil
Eurasia and North Africa
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Predators of Nodding thistle receptacle weevil Larvae
Birds, native beetles, spiders
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Predators of Adult Nodding thistle receptacle weevil
Birds, small mammals, reptiles, spiders
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Interesting Facts About Nodding thistle receptacle weevil
Nodding thistle receptacle weevil can alter its metabolism to survive internal temperatures that would typically be lethal to other species.
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Scientific Classification of Nodding thistle receptacle weevil
Tips for Finding Nodding thistle receptacle weevil
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Youth Habitat of Nodding thistle receptacle weevil
Agricultural and Cultivated Areas, Grasslands and Prairies
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Adult Habitat of Nodding thistle receptacle weevil
Agricultural and Cultivated Areas, Grasslands and Prairies
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When is the Best Time to Observe Nodding thistle receptacle weevil
Early morning or late afternoon when the temperature is cooler, are the suitable times as nodding thistle receptacle weevil is less active and easier to spot.
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What is the Best Weather to Observe Nodding thistle receptacle weevil
Mild, humid conditions are ideal when seeking nodding thistle receptacle weevil, as these creatures tend to avoid activity during hot, dry periods.
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How and Where Can You Find Nodding thistle receptacle weevil at Different Life Stages
Larva Nodding thistle receptacle weevil larvae are often located inside the seed heads of their host plants. To find them, dissect the seed heads gently over a tray to catch any larvae that fall out.
Pupal Finding nodding thistle receptacle weevil in its pupa stage requires searching inside the seed heads or in the soil beneath the host plant where they pupate. Look for signs of disturbance or small entry holes in the soil.
Adult To locate nodding thistle receptacle weevil adults, inspect the flowers and leaves of their host plants during early morning or late afternoon when they are most likely to feed or mate.
Are Nodding thistle receptacle weevil harmful?
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Harmful Effects of Nodding thistle receptacle weevil
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Hurt Plant

Nodding thistle receptacle weevil can cause severe damage throughout its adult and larval stages. It attacks any host plant, feeding on and laying eggs in flowers and seeds. Resulting in disrupted pollination and reduced seed viability, it threatens entire plant populations.

More Effects of Nodding thistle receptacle weevil

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