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Willow dagger moth

Willow dagger moth

Acronicta impressa

A species of Dagger moths, Also known as Impressive dagger moth, Impressed dagger

Acronicta impressa, the impressive dagger moth or willow dagger moth, is a moth of the family Noctuidae. The species was first described by Francis Walker in 1856. It is found from western Canada to north-western Mexico. The wingspan is about 38 mm. Adults are on wing from early to midsummer depending on the location. Recorded food plants include bitterbrush, rose, aspen, poplar and willow.

Does the Willow dagger moth cause allergies?
Allergenic
General Info About Willow dagger moth
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Attributes of Willow dagger moth
Colors
Black
Gray
White
Allergy-causing
The Willow dagger moth has special defensive behaviors that can trigger an allergic reaction. If there are serious reactions, seek IMMEDIATE medical attention.
Defensive attack
Not reported
Venomous
Not reported
Non-poisonous
Not reported
Borer
Not reported
Pollinator
Not reported
Pest-Eating Predatory
Not reported
Phytophagous
The Willow dagger moth 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
Siphoning mouthparts
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Species Status of Willow dagger moth
Widely distributed
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Distribution Area of Willow dagger moth
Western Canada, north-western Mexico
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Life Cycle of Willow dagger moth
Egg The egg is the first stage in the life of willow dagger moth, where it begins as a small, usually spherical object. The eggs are often laid in clusters and exhibit limited color variation. The sole function of this stage is to provide a protected environment for the developing embryo.
Larva Upon hatching, the larva of willow dagger moth is worm-like in shape. With a primary focus on feeding, the larva grows rapidly, molting several times. It exhibits distinct colors and patterns that may change with each molt, providing camouflage or warning signals.
Pupal The willow dagger moth enters the pupal stage encased within a chrysalis. Immobility characterizes this stage, and the pupa may blend with its surroundings. Inside, the willow dagger moth undergoes significant transformation, reorganizing into its adult form.
Adult Emerging from the pupa, the adult willow dagger moth'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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Interesting Facts About Willow dagger moth
Caterpillars of willow dagger moth mimic the appearance of twigs as a defense mechanism, rendering them nearly undetectable to predators in their natural habitat.
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Scientific Classification of Willow dagger moth
Tips for Finding Willow dagger moth
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Youth Habitat of Willow dagger moth
Forests and Woodlands, Grasslands and Prairies
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Adult Habitat of Willow dagger moth
Forests and Woodlands, Grasslands and Prairies, Urban and Suburban Areas
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How Can You Attract Willow dagger moth
During the caterpillar stage, willow dagger moth can be attracted using host plants that caterpillars feed on. Adult willow dagger moth, being moths, may be attracted to light sources or to bait such as a mixture of ripe fruit and fermenting sugars.
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What is the Best Weather to Observe Willow dagger moth
Weather that is not too cold or wet, with mild to moderate temperatures, could be ideal for finding willow dagger moth, as extreme temperatures and precipitation can reduce their activity levels.
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How and Where Can You Find Willow dagger moth at Different Life Stages
Egg Willow dagger moth eggs can often be located on the underside of leaves of the host plants. To find them, inspect leaves thoroughly, looking for small, spherical or ovate objects.
Larva Willow dagger moth larva can be seen feeding on leaves. Finding willow dagger moth in this stage involves searching for signs of feeding, like holes in leaves, and then looking for caterpillars nearby.
Pupal Willow dagger moth pupae might be found in loose soil or leaf litter. Searching around the base of host plants and gently probing the soil or leaf litter can reveal their presence.
Adult Willow dagger moth adults are moths that may be observed around light sources at night. Setting up a light trap with a white sheet can attract these moths for study or observation.
Are Willow dagger moth harmful?
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Harmful Effects of Willow dagger moth
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Allergenic
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Does the Willow dagger moth cause allergies?

Willow dagger moth's larvae stage is responsible for causing mild allergies in a small number of people. Contact with the larvae's hair can trigger allergic reactions, such as itching or rash. Most individuals may encounter minor discomfort, but for a subset with sensitive constitutions, symptoms could be more pronounced. Caution is advised when handling larvae, especially for those with known susceptibilities.

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Agricultural Pests

Larvae of willow dagger moth feed on the leaves of various crops, stripping foliage and compromising plant health. Large infestations can severely reduce photosynthesis, weakening or even killing plants. This pest's activity may lead to lower crop yields, impacting food supplies and agricultural economics.

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