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Iris weevil

Iris weevil

Mononychus punctumalbum

A species of Mononychus

The species is listed in the red lists of North Rhine-Westphalia and Thuringia under category 3 (endangered).

General Info About Iris weevil
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Attributes of Iris weevil
Colors
Black
Yellow
Habitat
damp area; garden; forest; cliff
Adult Food Sources
Iris plant tissues, iris seeds, iris flowers, iris leaves, other soft plant tissues
Larva Food Source
Iris plant tissues, iris seed endosperm
Biting/stinging
Not reported
Allergy-causing
Not reported
Defensive attack
Not reported
Venomous
Not reported
Non-poisonous
The Iris weevil is non-toxic and generally doesn't pose a risk to human health. No need for excessive worry.
Borer
The Iris 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 Iris 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 Iris weevil
With the exception of Scandinavia this species occurs throughout Europe and extends eastwards into Siberia.
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Distribution Area of Iris weevil
Austria
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Life Cycle of Iris weevil
Egg The eggs of iris weevil are typically laid in the host plant. They are small, ovular, and have a protective coating. Initially, they might blend with the plant tissue, offering camouflage.
Larva Upon hatching, larval iris weevil are worm-like, without wings, and primarily focused on eating to grow. They molt multiple times, expanding in size with each instar.
Pupal After reaching a sufficient size, iris weevil enters the pupal stage. It forms a pupa that is immobile, with the insect undergoing significant changes internally, reshaping its body structures.
Adult Emerging from the pupa, the adult iris 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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Adult Size of Iris weevil
4 - 5 mm
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Predators of Iris weevil Larvae
Birds, rodents, other insects (e.g., predatory beetles), arachnids (e.g., spiders)
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Predators of Adult Iris weevil
Birds, rodents, lizards, frogs, spiders, insects (e.g., mantises, predatory beetles)
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Interesting Facts About Iris weevil
Iris weevil can trick predators by playing dead, abruptly ceasing all movement when threatened, a tactic known as thanatosis.
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Scientific Classification of Iris weevil
Tips for Finding Iris weevil
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Youth Habitat of Iris weevil
Forests and Woodlands
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Adult Habitat of Iris weevil
Forests and Woodlands
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How Can You Attract Iris weevil
Based on the diet of various stages of iris weevil, suitable trap foods might include host plant material or synthetic attractants mimicking host plant odors.
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Habitat Preferences of Iris weevil Through Different Life Stages
The egg stage of iris weevil is typically found in the cavities of their host plants' stems or leaf petioles. As larvae, iris weevil tend to be burrowed inside plant tissues, such as roots or stems, where they can cause significant damage. To find them, one would have to carefully dissect affected plant parts. Pupae of iris weevil often remain hidden within the plant tissues or in the soil close to the host plant, requiring an observant eye to uncover them. Adult iris weevil are commonly found on the foliage, flowers, or bark of host plants where they feed and mate. To observe these adults, a search around the host plants during their active times of day will yield success.
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When is the Best Time to Observe Iris weevil
The best time to find iris weevil could be during their active feeding phase or mating periods, which can differ according to the creature's life cycle stages.
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What is the Best Weather to Observe Iris weevil
Ideal weather conditions for finding iris weevil may include warm and dry or humid days, which encourage activity, though exact conditions can depend on the creature's habitat preferences.
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How and Where Can You Find Iris weevil at Different Life Stages
Egg Eggs of iris weevil are typically laid on or near the host plants. To find them, inspect the leaves of known host plants for small clusters or rows of eggs.
Larva Larvae of iris weevil can usually be found munching on plant material. Look for them by carefully examining the host plants for any signs of feeding, such as holes in the leaves or frass (insect droppings).
Pupal Iris weevil pupae might be located in the soil, in plant debris, or on the host plant itself. Search by gently sifting through leaf litter or soil at the base of host plants or by checking the underside of leaves.
Adult Adult iris weevil will emerge to feed and mate, often found on or near host plants. They can be spotted by carefully searching host plants during the daytime when they are most active or by setting up light traps overnight to attract them.
Are Iris weevil harmful?
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Harmful Effects of Iris weevil
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Hurt Plant

The iris weevil inflicts harm on Iris pseudacorus by chewing through its vegetative and reproductive organs. It targets leaves, flowers, and seeds, impacting the plant's ability to photosynthesize and reproduce. The feeding activity results in physical tissue damage, which can weaken the plant and potentially lead to reduced fitness and vitality.

More Effects of Iris weevil

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