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Agonopterix alstroemeriana

Agonopterix alstroemeriana

Agonopterix alstromeriana

A species of Agonopterix

The hemlock moth (Agonopterix alstroemeriana), also known as the defoliating hemlock moth or poison hemlock moth, is a nocturnal moth species of the family Depressariidae. Of Palaearctic origin, it was first found in North America in 1973 when it was accidentally introduced. The moth is now widespread throughout the northern half of the United States, southern Canada, northern Europe, and, more recently, New Zealand. The larval form grows to around 10 mm, while the adults wingspan is between 17 mm and 19 mm. It is best known for its use in biological control of the lethally toxic poison hemlock (Conium maculatum), which is eaten by its caterpillars (larvae). The toxicity of its host plant may actually benefit the caterpillar because it helps females recognize locations for oviposition. This species also uses the leaves of its host plant (C. maculatum) to form protective tubes around the caterpillar.

General Info About Agonopterix alstroemeriana
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Attributes of Agonopterix alstroemeriana
Colors
Brown
Black
Red
Gray
White
Habitat
The poison hemlock moth can be found wherever its host plant (Conium maculatum) occurs. Thus, the moth is most commonly seen in open fields and roadsides in suburban and rural locations. In the U.S., A. alstroemeriana often winters under the bark of firewood; then flies away after being warmed up when the wood is brought into the house. Moths also may come inside buildings and housing during the night, as they are attracted to light.
Adult Food Sources
Flower nectar from available flowers, honeydew secreted by aphids, tree sap from small wounds in trees, juices from decaying fruits, liquid from manure or other organic decaying matter
Larva Food Source
Leaves of hemlock (conium maculatum), cow parsley (anthriscus sylvestris), wild carrot (daucus carota), other apiaceae plants
Biting/stinging
Not reported
Allergy-causing
Not reported
Defensive attack
Not reported
Venomous
Not reported
Non-poisonous
Not reported
Borer
Not reported
Pollinator
Not reported
Pest-Eating Predatory
Not reported
Phytophagous
Not reported
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Species Status of Agonopterix alstroemeriana
Stable population, rare
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Distribution Area of Agonopterix alstroemeriana
The Netherlands
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Life Cycle of Agonopterix alstroemeriana
Egg Tiny and often overlooked, the egg stage involves a protective covering in which the agonopterix alstroemeriana begins development, often resembling small beads deposited on host plants.
Larva After hatching, the caterpillar emerges, primarily focused on feeding. Its coloration serves as camouflage while it molts several times, significantly increasing in size.
Pupal Following the larval stage, the agonopterix alstroemeriana enters pupation, forming a chrysalis. Within this case, transformation occurs, structures rearrange, and adult features form while the agonopterix alstroemeriana remains stationary.
Adult Emerging from the pupa, the adult agonopterix alstroemeriana's development is marked by the presence of wings and functional reproductive organs. The body is fully formed and hardened, and the adult focuses on reproduction.
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Predators of Agonopterix alstroemeriana Larvae
Birds, small mammals, reptiles, amphibians, spiders, other predatory insects
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Predators of Adult Agonopterix alstroemeriana
Birds, bats, reptiles, spiders, insects like mantises and other predatory bugs
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Scientific Classification of Agonopterix alstroemeriana
Tips for Finding Agonopterix alstroemeriana
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Youth Habitat of Agonopterix alstroemeriana
Forests and Woodlands, Agricultural and Cultivated Areas
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Adult Habitat of Agonopterix alstroemeriana
Forests and Woodlands, Grasslands and Prairies, Agricultural and Cultivated Areas, Urban and Suburban Areas
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How Can You Attract Agonopterix alstroemeriana
Since agonopterix alstroemeriana is a moth, the most effective trap food might consist of substances that mimic the pheromones of the female moths or sweet mixtures like wine and sugar to attract them.
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Habitat Preferences of Agonopterix alstroemeriana Through Different Life Stages
The eggs of agonopterix alstroemeriana are typically laid on herbaceous plants, where they are sheltered among leaves. As larvae, they're found on or near their host plants, particularly umbellifers, where they feed and grow. Pupation generally occurs in a cocoon spun among the plant debris on the ground or in a protected area near the base of the host plant. Adults are often spotted in habitats such as grasslands, meadows, or gardens, usually on the foliage of a suitable plant. To find these stages, check respective plant species during the appropriate season, look closely at leaf surfaces and underside for eggs or larvae, and search ground litter or the base of plants for pupae.
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When is the Best Time to Observe Agonopterix alstroemeriana
The suitable time to find agonopterix alstroemeriana is usually at dusk or during the night when moths are most active. During daylight, they may be found resting on the undersides of leaves or camouflaged on tree bark.
Are Agonopterix alstroemeriana harmful?
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