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Garden webworm

Garden webworm

Achyra rantalis

A species of Achyra

The wingspan is 1.7 - 2.5 cm . The forewings are orange, brown or grayish brown. The hindwings are similar but lighter. The larvae have a yellowish, pale green or dark greenish body and a yellowish-brown head and reach a length of about 2.5 cm .

General Info About Garden webworm
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Attributes of Garden webworm
Colors
Brown
White
Habitat
field; garden
Adult Food Sources
Flower nectar, honeydew, plant sap, juicy fruit
Larva Food Source
Duckweed (lemna species), watermeal (wolffia species), frogbit (hydrocharis morsus-ranae), water hyacinth (eichhornia crassipes), water lettuce (pistia stratiotes)
Biting/stinging
Not reported
Allergy-causing
Not reported
Defensive attack
Not reported
Pest-Eating Predatory
Not reported
Phytophagous
The Garden webworm 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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Life Cycle of Garden webworm
Egg The egg of garden webworm appears minuscule and oval. Initially, the egg's color is pale white but gradually darkens as the embryo develops. These eggs serve as the initial phase of life and are usually laid on host plants.
Larva Upon hatching, the caterpillar or larva of garden webworm is a voracious feeder, primarily focusing on growth. During this stage, the larva will molt several times, increasing in size and sometimes varying in color.
Pupal After reaching the necessary size, garden webworm enters the pupal stage, forming a cocoon around itself. This stage is characterized by a drastic transformation inside the chrysalis, reshaping its body in preparation for adult life.
Adult Emerging from the pupa, the adult garden webworm’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 Garden webworm
1.7 - 2.5 cm
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Predators of Garden webworm Larvae
Birds, rodents, other insect larvae, parasitic wasps, spiders
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Predators of Adult Garden webworm
Bats, birds, spiders, mantis, other predatory insects
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Interesting Facts About Garden webworm
The garden webworm is capable of 'snapping' its wings together, which creates a clicking sound thought to deter predators.
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Scientific Classification of Garden webworm
Tips for Finding Garden webworm
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How Can You Attract Garden webworm
To attract garden webworm in adult stage, light traps can be effective as these creatures are typically nocturnal and are drawn to sources of light at night. Alternatively, baiting with fermented sweet substances like overly ripe fruit or sugary mixtures can also lure them in.
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Habitat Preferences of Garden webworm Through Different Life Stages
The eggs of garden webworm are typically laid on host plants near wetlands, especially on rushes or grasses. Caterpillars emerge exclusively within these vegetation types, where they feed and develop, often creating shelters by spinning silken webs entwining foliage or stems. Pupation occurs close to the feeding site in a robust cocoon. Adults, who are most active at night, disperse to mate and lay eggs but are drawn to light sources, making them observable in areas with artificial illumination near their larval habitats. To locate these insects throughout their life stages, visit marshy areas with abundant grasses for eggs and caterpillars, inspect silk nestings on host plants for caterpillars, look for cocoons hidden in the foliage, and conduct nighttime searches with lamps for active adults.
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When is the Best Time to Observe Garden webworm
The best time to find adult garden webworm is usually at night since they are moths and are attracted to light. For larvae, the daytime may be more suitable when they are active and feeding on host plants.
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What is the Best Weather to Observe Garden webworm
Calm, warm, and humid nights are typically the most suitable conditions for finding adult garden webworm, as they are more active in such weather. The larval stages may be easier to find during moist conditions that promote plant growth and provide a moist environment for the larvae.
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How and Where Can You Find Garden webworm at Different Life Stages
Egg Garden webworm eggs are often laid on host plants and can be found by carefully inspecting the leaves, especially on the undersides where they may be hidden.
Larva Garden webworm larvae can be found on or near their food plants. To find them, examine the foliage for signs of feeding such as holes or chewed edges, and look directly for the caterpillars themselves.
Pupal Garden webworm pupae may be in concealed locations such as under leaves, in crevices, or underground. Finding them involves gently sifting through leaf litter or soil near the host plants.
Adult Garden webworm adults are often nocturnal and can be found by using a light trap at night. They are attracted to the light and may also come to fermented bait traps set out in likely habitats.
Are Garden webworm harmful?
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Harmful Effects of Garden webworm
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Agricultural Pests

The larvae of garden webworm target corn, lettuce, and asparagus, chewing tissues of leaves and stems, which can lead to mild defoliation or severe crop loss. A small number causes negligible damage, but large infestations can result in significant yield losses. This indirectly affects humans by threatening food supply and economic stability.

More Effects of Garden webworm

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